Re: [Tutor] error when using using subprocess.popen in Python wrapper script
If I want to write this command to a file, would this be the right format?
*
import subprocess
(all my variables defined okay)
perl_script=subprocess.call(['perl',perl_prog,ipfile,cmd,user,timeout,])
log=open('/tmp/pythonOutput.txt',w)
log.write(subprocess.call(perl_script))
*
The program runs (and outputs stuff on the screen okay), but when I
"cat /tmp/pythonOutput.txt", nothing is there.
(While I'm not waiting for the entire program to run across all the IP
addresses, I would think that something would be go out into that log
file.)
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Re: [Tutor] error when using using subprocess.popen in Python wrapper script
Rogelio wrote:
> If I want to write this command to a file, would this be the right format?
>
> *
> import subprocess
>
> (all my variables defined okay)
>
> perl_script=subprocess.call(['perl',perl_prog,ipfile,cmd,user,timeout,])
>
> log=open('/tmp/pythonOutput.txt',w)
> log.write(subprocess.call(perl_script))
> *
>
> The program runs (and outputs stuff on the screen okay), but when I
> "cat /tmp/pythonOutput.txt", nothing is there.
The documentation is fairly clear:
"""
subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)
Run the command described by args. Wait for command to complete, then return
the returncode attribute.
"""
> (While I'm not waiting for the entire program to run across all the IP
> addresses, I would think that something would be go out into that log
> file.)
No, you'll get an integer return code and ultimately a TypeError when you
pass that to the file's write() method.
Read the docs on Popen.communicate()
http://docs.python.org/library/subprocess.html#subprocess.Popen.communicate
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[Tutor] Displaying data in columns
I have some data that comes out of a database as a list of tuples of integers and strings, one tuple for each row in the ResultProxy from the select operation. The data looks something like this: [(56, 12, 8, u'2012-02', 10, 12, u'Guangxi Province', u'Guangxi', u'10', 8, u'TOT'), (57, 21, 1, u'2012-03', 36, 21, u'Sichuan EQ Region', u'Sichuan', u'2', 1, u'Basic Medical - Rural')] I would like to display some of the items in the tuples in columnar format with each column lining up on the left side (below should be three neat columns with location, training type, number trained and date): Guangxi ProvinceTOT 10 2012-02 Sichuan EQ Region Basic Medical - Rural 36 2012-03 Surely there is a python module that helps with that, isn't there? I know I could write a function that reads the items, figures string lengths, adds padding white space and prints out the columns but am hoping there is a more elegant solution. I am not against reading documentation, just can't find the right module to read about. thomas ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Displaying data in columns
On 5/7/2012 9:43 AM, Thomas C. Hicks wrote: I have some data that comes out of a database as a list of tuples of integers and strings, one tuple for each row in the ResultProxy from the select operation. The data looks something like this: Where the data comes from is not relevant. Please don't clutter your questions with irrelevant facts. [(56, 12, 8, u'2012-02', 10, 12, u'Guangxi Province', u'Guangxi', u'10', 8, u'TOT'), (57, 21, 1, u'2012-03', 36, 21, u'Sichuan EQ Region', u'Sichuan', u'2', 1, u'Basic Medical - Rural')] I would like to display some of the items in the tuples in columnar format with each column lining up on the left side (below should be three neat columns with location, training type, number trained and date): Guangxi ProvinceTOT 10 2012-02 Sichuan EQ Region Basic Medical - Rural 36 2012-03 Surely there is a python module that helps with that, isn't there? I know I could write a function that reads the items, figures string lengths, adds padding white space and prints out the columns but am hoping there is a more elegant solution. I am not against reading documentation, just can't find the right module to read about. the basic tool you'd use is string formatting. I prefer the original %. "%24s%24s%8s%7s" % -- Bob Gailer 919-636-4239 Chapel Hill NC ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] looking for some advice
Hello Everyone: Here is what I am trying to do: I have a window which has a row of buttons on it. Below the buttons is a label frame. Depending upon which button they push, I want to change the widgets in the label frame. I can add widgets now with no problem. Basically, I am trying to imitate a notebook like in Tkinter.ttk, without having to re-write a major chunk of the app to add such a widget. I know Tix has a notebook widget, but that would require people (read end users) to download and compile the Tix components. My questions are: 1. how do I remove all of the widgets from the label frame to add the new ones? 2. Am I better off just creating different label frames for each group of widgets and then just using grid_forget and grid_remember to hide or show them as I need them? 3. How else would you approach this problem? Yes - I guess I am looking for some design advice. This is creeping a little since my customer (my wife who is a horse breeder) would like to have some things done a little differently in her app. Thanks for your suggestions! Chris ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Displaying data in columns
On 5/7/2012 6:43 AM Thomas C. Hicks said... I would like to display some of the items in the tuples in columnar format with each column lining up on the left side I am not against reading documentation, just can't find the right module to read about. You'll want to read up on the string interpolation related docs. Start with http://docs.python.org/release/2.5.2/lib/typesseq-strings.html or the equivalent for your python version. Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Curious dictionary printing
In 3.2.2 in IDLE I have this dictionary entry:
Namath = {"first_name": "Joe", "last_name": "Namath", "phone": "212-222-",\
"email": "joe.nam...@gmail.com", "stadium": "Shea Stadium"}
when I print it:
print(Namath)
I get:
{'phone': '212-222-', 'first_name': 'Joe', 'last_name': 'Namath',
'email': 'joe.nam...@gmail.com', 'stadium': 'Shea Stadium'}
Why is it out of order?
--
Frank L. "Cranky Frankie" Palmeri
Risible Riding Raconteur & Writer
“The problem with quotes on the Internet is that
it is often difficult to verify their authenticity.”
- Abraham Lincoln
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Re: [Tutor] Curious dictionary printing
Hi,
On 7 May 2012 18:16, Cranky Frankie wrote:
> In 3.2.2 in IDLE I have this dictionary entry:
>
> Namath = {"first_name": "Joe", "last_name": "Namath", "phone": "
> 212-222-",\
> "email": "joe.nam...@gmail.com", "stadium": "Shea Stadium"}
>
> Why is it out of order?
Python dictionaries (unlike real physical language dictionaries), are not
ordered, and should be thought of as "an unordered set of *key:
value*pairs"[1]
Walter
[1] http://docs.python.org/tutorial/datastructures.html
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Re: [Tutor] looking for some advice
Chris Hare wrote: > Hello Everyone: > > Here is what I am trying to do: > > I have a window which has a row of buttons on it. Below the buttons is a > label frame. Depending upon which button they push, I want to change the > widgets in the label frame. I can add widgets now with no problem. > > Basically, I am trying to imitate a notebook like in Tkinter.ttk, without > having to re-write a major chunk of the app to add such a widget. I know > Tix has a notebook widget, but that would require people (read end users) > to download and compile the Tix components. > > My questions are: > > 1. how do I remove all of the widgets from the label frame to add the new > ones? > 2. Am I better off just creating different label frames for each group of > widgets and then just using grid_forget and grid_remember to hide or show > them as I need them? > 3. How else would you approach this problem? > > Yes - I guess I am looking for some design advice. This is creeping a > little since my customer (my wife who is a horse breeder) would like to > have some things done a little differently in her app. > > Thanks for your suggestions! There is a tabbedpages.TabbedPageSet widget in idlelib. At first glance I don't see any dependencies, so maybe you can use that? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] How can I have type "function" in my script?
Hi,
I have this script:
from types import *
class Tag:
def __init__(self, nom, tipus, valor):
self.nom = nom
self.tipus = tipus
self.valor = valor
def __str__(self):
return "Nom: " + str(self.nom) + ", Tipus: " + str(self.tipus)
+ ", Valor: " + str(self.valor)
def main():
a = Tag("descripció", str, "primera tasca")
b = Tag("unmes", str, lambda x: x+1)
print(a)
print(b)
if __name__ == '__main__':
main()
All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1)
for b = Tag("unmes", function, lambda x: x+1) I receive an error that
function is not globally defined variable. How can I say that function
is the types.function? (the type of lambda x: x+1)
I use python3
Thanks in advance,
Xan.
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Re: [Tutor] looking for some advice
Thanks Peter - I will give it a look On May 7, 2012, at 1:02 PM, Peter Otten wrote: > Chris Hare wrote: > >> Hello Everyone: >> >> Here is what I am trying to do: >> >> I have a window which has a row of buttons on it. Below the buttons is a >> label frame. Depending upon which button they push, I want to change the >> widgets in the label frame. I can add widgets now with no problem. >> >> Basically, I am trying to imitate a notebook like in Tkinter.ttk, without >> having to re-write a major chunk of the app to add such a widget. I know >> Tix has a notebook widget, but that would require people (read end users) >> to download and compile the Tix components. >> >> My questions are: >> >> 1. how do I remove all of the widgets from the label frame to add the new >> ones? >> 2. Am I better off just creating different label frames for each group of >> widgets and then just using grid_forget and grid_remember to hide or show >> them as I need them? >> 3. How else would you approach this problem? >> >> Yes - I guess I am looking for some design advice. This is creeping a >> little since my customer (my wife who is a horse breeder) would like to >> have some things done a little differently in her app. >> >> Thanks for your suggestions! > > There is a tabbedpages.TabbedPageSet widget in idlelib. At first glance I > don't see any dependencies, so maybe you can use that? > > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How can I have type "function" in my script?
Xan, it's "not defined" because you haven't defined a function called
"function" or any variable called "function".
Nom: descripci, Tipus: , Valor: primera tasca
Nom: unmes, Tipus: , Valor: at 0x10df736e0>
str comes back as because str is a built-in method and python
and will always be in the namespace.
See http://docs.python.org/library/functions.html#str
On Mon, May 7, 2012 at 1:24 PM, xancorreu wrote:
> Hi,
>
> I have this script:
>
> from types import *
>
> class Tag:
>
>def __init__(self, nom, tipus, valor):
>self.nom = nom
>self.tipus = tipus
>self.valor = valor
>
>def __str__(self):
>return "Nom: " + str(self.nom) + ", Tipus: " + str(self.tipus) +
> ", Valor: " + str(self.valor)
>
>
> def main():
>a = Tag("descripció", str, "primera tasca")
>b = Tag("unmes", str, lambda x: x+1)
>print(a)
>print(b)
>
> if __name__ == '__main__':
>main()
>
>
> All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1) for
> b = Tag("unmes", function, lambda x: x+1) I receive an error that function
> is not globally defined variable. How can I say that function is the
> types.function? (the type of lambda x: x+1)
>
> I use python3
>
>
> Thanks in advance,
> Xan.
> __**_
> Tutor maillist - Tutor@python.org
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>
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Re: [Tutor] How can I have type "function" in my script?
On 05/07/2012 02:24 PM, xancorreu wrote:
> Hi,
>
> I have this script:
>
> from types import *
>
Bad idea. Once you do that, you can silently overwrite globals in your
own module with stuff that the current version of types happens to have
in it. Besides, it then becomes very hard to read your program and
figure out which names you really did want to import.
If you're just getting one or two names, such as in your case, better
just do
import types
> class Tag:
>
> def __init__(self, nom, tipus, valor):
> self.nom = nom
> self.tipus = tipus
> self.valor = valor
>
> def __str__(self):
> return "Nom: " + str(self.nom) + ", Tipus: " +
> str(self.tipus) + ", Valor: " + str(self.valor)
>
>
> def main():
> a = Tag("descripció", str, "primera tasca")
> b = Tag("unmes", str, lambda x: x+1)
> print(a)
> print(b)
>
> if __name__ == '__main__':
> main()
>
>
> All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1)
> for b = Tag("unmes", function, lambda x: x+1) I receive an error that
> function is not globally defined variable. How can I say that function
> is the types.function? (the type of lambda x: x+1)
>
Where's the stack trace and the exact error message?
types.function is undefined. The types module does not expose a name
called 'function,' at least not in python 3.2
The type of a lambda is , so it's not clear what you
really want.
Why don't you show the program as you actually run it (perhaps with both
versions of the b= assignment), and the output and stack trace you got.
Then explain just what you'd hoped to get, as output.
> I use python3
>
>
> Thanks in advance,
> Xan.
--
DaveA
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Re: [Tutor] How can I have type "function" in my script?
On Mon, May 7, 2012 at 3:07 PM, Dave Angel wrote:
> On 05/07/2012 02:24 PM, xancorreu wrote:
>> Hi,
>>
>> I have this script:
>>
>> from types import *
>>
> Bad idea. Once you do that, you can silently overwrite globals in your
> own module with stuff that the current version of types happens to have
> in it. Besides, it then becomes very hard to read your program and
> figure out which names you really did want to import.
>
> If you're just getting one or two names, such as in your case, better
> just do
> import types
>
>> class Tag:
can a class be defined this way in python 3.x? I thought it needs a
parent class as a parameter?
>>
>> def __init__(self, nom, tipus, valor):
>> self.nom = nom
>> self.tipus = tipus
>> self.valor = valor
>>
>> def __str__(self):
>> return "Nom: " + str(self.nom) + ", Tipus: " +
>> str(self.tipus) + ", Valor: " + str(self.valor)
>>
>>
>> def main():
>> a = Tag("descripció", str, "primera tasca")
>> b = Tag("unmes", str, lambda x: x+1)
>> print(a)
>> print(b)
>>
>> if __name__ == '__main__':
>> main()
>>
>>
>> All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1)
>> for b = Tag("unmes", function, lambda x: x+1) I receive an error that
>> function is not globally defined variable. How can I say that function
>> is the types.function? (the type of lambda x: x+1)
>>
> Where's the stack trace and the exact error message?
>
> types.function is undefined. The types module does not expose a name
> called 'function,' at least not in python 3.2
>
> The type of a lambda is , so it's not clear what you
> really want.
>
> Why don't you show the program as you actually run it (perhaps with both
> versions of the b= assignment), and the output and stack trace you got.
> Then explain just what you'd hoped to get, as output.
>
>
>> I use python3
>>
>>
>> Thanks in advance,
>> Xan.
>
> --
>
> DaveA
>
> ___
> Tutor maillist - Tutor@python.org
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--
Joel Goldstick
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Re: [Tutor] How can I have type "function" in my script?
On 05/07/2012 03:11 PM, Joel Goldstick wrote: > On Mon, May 7, 2012 at 3:07 PM, Dave Angel wrote: >> On 05/07/2012 02:24 PM, xancorreu wrote: >>> Hi, >>> >>> I have this script: >>> >>> from types import * >>> >> Bad idea. Once you do that, you can silently overwrite globals in your >> own module with stuff that the current version of types happens to have >> in it. Besides, it then becomes very hard to read your program and >> figure out which names you really did want to import. >> >> If you're just getting one or two names, such as in your case, better >> just do >>import types >> >>> class Tag: > > can a class be defined this way in python 3.x? I thought it needs a > parent class as a parameter? >>> That's legal in 3.x The difference between 2.x and 3.x is that if you omit the base class in 2.x, it generates an old-style class, while in 3.x it always uses new-style classes. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Displaying data in columns
On 07/05/12 14:43, Thomas C. Hicks wrote: I would like to display some of the items in the tuples in columnar format with each column lining up on the left side (below should be three neat columns with location, training type, number trained and date): You need to read up on string formatting. That allows you to specify the length of fields, whether they are left or right justified, any leading pad characters etc. This is not in a module but is a standard feature of Python. For anything more exotic you should look to a formatting language like HTML. Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] looking for some advice
On 07/05/12 15:19, Chris Hare wrote: Basically, I am trying to imitate a notebook like in Tkinter.ttk, I know Tix has a notebook widget, but that would require people > to download and compile the Tix components. You must be using a very old version of Python. Tix has been in the standard library since version 2.3 I think... The documentation for the Python version is not great but there is a lot on the Tcl version wjhich is fairly easy to translate. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How can I have type "function" in my script?
Al 07/05/12 21:07, En/na Dave Angel ha escrit:
On 05/07/2012 02:24 PM, xancorreu wrote:
Hi,
I have this script:
from types import *
Bad idea. Once you do that, you can silently overwrite globals in your
own module with stuff that the current version of types happens to have
in it. Besides, it then becomes very hard to read your program and
figure out which names you really did want to import.
If you're just getting one or two names, such as in your case, better
just do
import types
class Tag:
def __init__(self, nom, tipus, valor):
self.nom = nom
self.tipus = tipus
self.valor = valor
def __str__(self):
return "Nom: " + str(self.nom) + ", Tipus: " +
str(self.tipus) + ", Valor: " + str(self.valor)
def main():
a = Tag("descripció", str, "primera tasca")
b = Tag("unmes", str, lambda x: x+1)
print(a)
print(b)
if __name__ == '__main__':
main()
All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1)
for b = Tag("unmes", function, lambda x: x+1) I receive an error that
function is not globally defined variable. How can I say that function
is the types.function? (the type of lambda x: x+1)
Where's the stack trace and the exact error message?
types.function is undefined. The types module does not expose a name
called 'function,' at least not in python 3.2
The type of a lambda is, so it's not clear what you
really want.
Why don't you show the program as you actually run it (perhaps with both
versions of the b= assignment), and the output and stack trace you got.
Then explain just what you'd hoped to get, as output.
This is the code:
class Tag:
def __init__(self, nom, tipus, valor):
self.nom = nom
self.tipus = tipus
self.valor = valor
def __str__(self):
return "Nom: " + str(self.nom) + ", Tipus: " + str(self.tipus)
+ ", Valor: " + str(self.valor)
class Task:
_nombre = 0
def __init__(self):
self.tags = []
Task._nombre = Task._nombre + 1
self.num = Task._nombre
def __str__(self):
return "Número: " + str(self.num) + ", Tags: " + str(self.tags)
def main():
a = Tag("descripció", str, "primera tasca")
b = Tag("unmes", str, lambda x: x+1)
c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
# en comptes de str ha de ser lambda
print(a)
print(b)
print(b.valor(2))
t = Task()
print("Tasca 1:", t)
t2 = Task()
print("Tasca 2:", t2)
if __name__ == '__main__':
main()
and it fails here:
$ python3 tasques.py
File "tasques.py", line 26
c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
^
SyntaxError: invalid syntax
Really, I want to specify "manually" the type of lambda, but it does not
work. How to do that?
Thanks,
I use python3
Thanks in advance,
Xan.
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Re: [Tutor] Curious dictionary printing
On 07/05/2012 18:16, Cranky Frankie wrote:
In 3.2.2 in IDLE I have this dictionary entry:
Namath = {"first_name": "Joe", "last_name": "Namath", "phone": "212-222-",\
"email": "joe.nam...@gmail.com", "stadium": "Shea Stadium"}
when I print it:
print(Namath)
I get:
{'phone': '212-222-', 'first_name': 'Joe', 'last_name': 'Namath',
'email': 'joe.nam...@gmail.com', 'stadium': 'Shea Stadium'}
Why is it out of order?
Cos plain old dicts have no order, but this can be done with
http://docs.python.org/library/collections.html#ordereddict-objects
--
Cheers.
Mark Lawrence.
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Re: [Tutor] How can I have type "function" in my script?
On 05/07/2012 04:37 PM, xancorreu wrote:
> Al 07/05/12 21:07, En/na Dave Angel ha escrit:
>> On 05/07/2012 02:24 PM, xancorreu wrote:
>>> Hi,
>>>
>>> I have this script:
>>>
>>> from types import *
>>>
>> Bad idea. Once you do that, you can silently overwrite globals in your
>> own module with stuff that the current version of types happens to have
>> in it. Besides, it then becomes very hard to read your program and
>> figure out which names you really did want to import.
>>
>> If you're just getting one or two names, such as in your case, better
>> just do
>> import types
>>
>>> class Tag:
>>>
>>> def __init__(self, nom, tipus, valor):
>>> self.nom = nom
>>> self.tipus = tipus
>>> self.valor = valor
>>>
>>> def __str__(self):
>>> return "Nom: " + str(self.nom) + ", Tipus: " +
>>> str(self.tipus) + ", Valor: " + str(self.valor)
>>>
>>>
>>> def main():
>>> a = Tag("descripció", str, "primera tasca")
>>> b = Tag("unmes", str, lambda x: x+1)
>>> print(a)
>>> print(b)
>>>
>>> if __name__ == '__main__':
>>> main()
>>>
>>>
>>> All is ok, but when I substitute b = Tag("unmes", str, lambda x: x+1)
>>> for b = Tag("unmes", function, lambda x: x+1) I receive an error that
>>> function is not globally defined variable. How can I say that function
>>> is the types.function? (the type of lambda x: x+1)
>>>
>> Where's the stack trace and the exact error message?
>>
>> types.function is undefined. The types module does not expose a name
>> called 'function,' at least not in python 3.2
>>
>> The type of a lambda is, so it's not clear what you
>> really want.
>>
>> Why don't you show the program as you actually run it (perhaps with both
>> versions of the b= assignment), and the output and stack trace you got.
>> Then explain just what you'd hoped to get, as output.
>>
>
> This is the code:
>
> class Tag:
>
> def __init__(self, nom, tipus, valor):
> self.nom = nom
> self.tipus = tipus
> self.valor = valor
>
> def __str__(self):
> return "Nom: " + str(self.nom) + ", Tipus: " + str(self.tipus)
> + ", Valor: " + str(self.valor)
>
> class Task:
> _nombre = 0
>
> def __init__(self):
> self.tags = []
> Task._nombre = Task._nombre + 1
> self.num = Task._nombre
>
>
> def __str__(self):
> return "Número: " + str(self.num) + ", Tags: " + str(self.tags)
>
> def main():
> a = Tag("descripció", str, "primera tasca")
> b = Tag("unmes", str, lambda x: x+1)
> c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
> # en comptes de str ha de ser lambda
> print(a)
> print(b)
> print(b.valor(2))
> t = Task()
> print("Tasca 1:", t)
> t2 = Task()
> print("Tasca 2:", t2)
>
> if __name__ == '__main__':
> main()
>
>
> and it fails here:
>
> $ python3 tasques.py
> File "tasques.py", line 26
> c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
>^
> SyntaxError: invalid syntax
>
>
> Really, I want to specify "manually" the type of lambda, but it does not
> work. How to do that?
>
>
> Thanks,
>
>>> I use python3
>>>
>>>
>>> Thanks in advance,
>>> Xan.
>
>
def main():
a = Tag("descripció", str, "primera tasca")
print (a)
b = Tag("unmes", str, lambda x: x+1)
print(b)
c = Tag("unmes", "function", lambda x: x+1)
print(c)
Does that help?
--
DaveA
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Re: [Tutor] How can I have type "function" in my script?
On 07/05/12 21:37, xancorreu wrote:
This is the code:
OK, But it's not clear from that why you want the type.
You are not doing anything meaningful with the type.
class Tag:
def __init__(self, nom, tipus, valor):
self.nom = nom
self.tipus = tipus
self.valor = valor
def __str__(self):
return "Nom: " + str(self.nom) + ", Tipus: " + str(self.tipus) + ",
Valor: " + str(self.valor)
You store it then print the string version of it.
Why not just pass a string name?
def main():
a = Tag("descripció", str, "primera tasca")
b = Tag("unmes", str, lambda x: x+1)
c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
and it fails here:
$ python3 tasques.py
File "tasques.py", line 26
c = Tag("twice", type(lambda: x: x), lambda x: 2*x)
^
SyntaxError: invalid syntax
As it says there is a syntax error. Look at your two lambda expressions,
the second one has an extra :
If you really want the type of a function just use one of the
built in functions... or a very simple lambda:
>>> type(pow)
>>> type(lambda : 0)
>>>
But in most cases you don't need the type and the callable() function is
more useful.
>>> callable(pow)
True
>>> callable(lambda : 0)
True
>>> callable(7)
False
>>>
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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[Tutor] Console Application - Key Events
Hi tutors, I would like to know if there is any "easy" way to handle events (such as mouse movements, keyboard keys pressed, etc) in console based python applications? More specifically, I am working on a screensaver for terminals ( http://termsaver.info), so I would like to simulate the same behaviour of a standard screensaver for the X windows, by: - running on background - starting some functionality (display a text, etc) if there is no event (mouse or keyboard) for more than N minutes - stopping the above if there is any movement detected Any thoughts on this would be highly appreciated. Thanks! -- *Braga, Bruno* www.brunobraga.net bruno.br...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Curious dictionary printing
On 5/7/2012 1:16 PM, Cranky Frankie wrote:
In 3.2.2 in IDLE I have this dictionary entry:
Namath = {"first_name": "Joe", "last_name": "Namath", "phone": "212-222-",\
"email": "joe.nam...@gmail.com", "stadium": "Shea Stadium"}
when I print it:
print(Namath)
I get:
{'phone': '212-222-', 'first_name': 'Joe', 'last_name': 'Namath',
'email': 'joe.nam...@gmail.com', 'stadium': 'Shea Stadium'}
Why is it out of order?
May I recommend a different approach to such questions.
When you get an unexpected (undesired) result try saying - "Oh I see -
that's how Python does it!"
I want something different. How can I get it?
Then try reading the documentation.
Asking why does it not do what I want is not IMHO the best way to win
friends here.
Taking this steps further
- what does it mean to be "in order". To some it is the order in which
items are added rather than some collating sequence.
- Do you want order by key or by value?
- how would you order {1 : 'cat', "a": 3, (2,3): True}?
--
Bob Gailer
919-636-4239
Chapel Hill NC
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[Tutor] IPcount = 0 when used with subprocess.call (use something to convert to integer?)
I am wrapping a Python wrapper script to "wc -l" (count lines) of a
list of IP addresses
***
import subprocess
IPcount = subprocess.call(['wc -l file.txt | awk \'{print $1}\''], shell=True)
print "You have",IPcount,"IP addresses that are alive."
***
I get the following output
***
46
You have 0 IP addresses that are alive.
***
Why does IPcount not equal 46? Is this what the stout is for?
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Re: [Tutor] IPcount = 0 when used with subprocess.call (use something to convert to integer?)
On Mon, May 7, 2012 at 8:09 PM, Rogelio wrote:
> Why does IPcount not equal 46? Is this what the stout is for?
FWIW, I think this seems to fix it and make IPcount an integer.
import os
IPcount = os.popen("wc -l file.txt | awk '{print $1}'").read()
print "You have",IPcount,"IP addresses that are alive."
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Re: [Tutor] IPcount = 0 when used with subprocess.call (use something to convert to integer?)
On Tue, May 8, 2012 at 8:39 AM, Rogelio wrote:
> I am wrapping a Python wrapper script to "wc -l" (count lines) of a
> list of IP addresses
>
> ***
>
> import subprocess
> IPcount = subprocess.call(['wc -l file.txt | awk \'{print $1}\''], shell=True)
> print "You have",IPcount,"IP addresses that are alive."
>
> ***
>
> I get the following output
>
> ***
> 46
> You have 0 IP addresses that are alive.
> ***
>
> Why does IPcount not equal 46? Is this what the stout is for?
You can do this:
http://docs.python.org/py3k/library/subprocess.html#replacing-bin-sh-shell-backquote
However, for this simple action of counting lines in a file, I
recommend you do it directly in python:
def count_lines(filename):
with open(f, 'r') as in_stream:
return len(in_stream.readlines())
The count_lines function takes a filename and returns the number of
lines in that file. This way you avoid the problems with shell
metacharacters when using shell=True, mentioned in the subprocess
documentation:
http://docs.python.org/py3k/library/subprocess.html#frequently-used-arguments
--
regards,
kushal
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Re: [Tutor] IPcount = 0 when used with subprocess.call (use something to convert to integer?)
On Mon, May 07, 2012 at 08:09:55PM -0700, Rogelio wrote:
> import subprocess
> IPcount = subprocess.call(['wc -l file.txt | awk \'{print $1}\''], shell=True)
> print "You have",IPcount,"IP addresses that are alive."
>
> I get the following output
>
> 46
> You have 0 IP addresses that are alive.
>
> Why does IPcount not equal 46? Is this what the stout is for?
Yes. The output of the call gets written to stdout. The return result of
the call is 0 if the call succeeded and some other integer if it failed.
--
Steven
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[Tutor] summary stats grouped by month year
I would like to calculate summary statistics of rainfall based on year and month. I have the data in a text file (although could put in any format if it helps) extending over approx 40 years: YEAR MONTHMeanRain 1972 Jan12.7083199 1972 Feb14.17007142 1972 Mar14.5659302 1972 Apr1.508517302 1972 May2.780009889 1972 Jun1.609619287 1972 Jul0.138150181 1972 Aug0.214346148 1972 Sep1.322102228 I would like to be able to calculate the total rain annually: YEAR Annualrainfall 1972400 1973300 1974350 2011 400 and also the monthly mean rainfall for all years: YEAR MonthlyMeanRain Jan 13 Feb 15 Mar 8 . Dec 13 Is this something I can easily do? I have started by simply importing the text file but data is not represented as time so that is probably my first problem and then I am not sure how to group them by month/year. textfile=r"textfile.txt" f=np.genfromtxt(textfile,skip_header=1) Any feedback will be greatly appreciated. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] summary stats grouped by month year
Hello anonymous questioner,
first comment - you may want to look into hdf5 data structures
http://www.hdfgroup.org/HDF5/
and the python tools to play with them
pytables - http://www.pytables.org/moin
h5py - http://code.google.com/p/h5py/
I have personally used pytables more - but not for any good reason. If you
happen to have the Enthought python distribution - these come with the package,
as well as an installation of hdf5
hdf5 is a very nice file format for storing large amounts of data (binary) with
descriptive meta-data. Also, numpy plays very nice with hdf5. Given all your
questions here, I suspect you would benefit from learning about these and
learning to play with them.
Now to your specific question.
> I would like to calculate summary statistics of rainfall based on year and
> month.
> I have the data in a text file (although could put in any format if it helps)
> extending over approx 40 years:
> YEAR MONTHMeanRain
> 1972 Jan12.7083199
> 1972 Feb14.17007142
> 1972 Mar14.5659302
> 1972 Apr1.508517302
> 1972 May2.780009889
> 1972 Jun1.609619287
> 1972 Jul0.138150181
> 1972 Aug0.214346148
> 1972 Sep1.322102228
>
> I would like to be able to calculate the total rain annually:
>
> YEAR Annualrainfall
> 1972400
> 1973300
> 1974350
>
> 2011 400
>
> and also the monthly mean rainfall for all years:
>
> YEAR MonthlyMeanRain
> Jan 13
> Feb 15
> Mar 8
> .
> Dec 13
>
>
> Is this something I can easily do?
Yes - this should be very easy. Imagine importing all this data into a numpy
array
===
import numpy as np
data = open(your_data).readlines()
years = []
for line in data:
if line.split()[0] not in years:
years.append(line.split()[0])
months = ['Jan','Feb',,'Dec']
rain_fall = np.zeros([len(n_year),len(months)])
for y,year in enumerate(years):
for m,month in enumerate(months):
rain_fall[y,m] = float(data[ y * 12 + m].split()[2])
# to get average per year - average over months - axis=1
print np.mean(rain_fall,axis=1)
# to get average per month - average over years - axis=0
print np.mean(rain_fall,axis=0)
===
now you should imagine doing this by setting up dictionaries, so that you can
request an average for year 1972 or for month March. That is why I used the
enumerate function before to walk the indices - so that you can imagine
building the dictionary simultaneously.
years = {'1972':0, '1973':1, }
months = {'Jan':0,'Feb':1,...'Dec':11}
then you can access and store the data to the array using these dictionaries.
print rain_fall[int('%(1984)s' % years), int('%(March)s' % months)]
Andre
> I have started by simply importing the text file but data is not represented
> as time so that is probably my first problem and then I am not sure how to
> group them by month/year.
>
> textfile=r"textfile.txt"
> f=np.genfromtxt(textfile,skip_header=1)
>
> Any feedback will be greatly appreciated.
>
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Re: [Tutor] Curious dictionary printing
Put it simple, dictionaries do not sort. You can use the dict.keys() to get
a list of the dictionary keys, then sort them... there are lots of talks on
this, just google a bit, and you will find fancy ways to do key or value
sorting.
--
*Braga, Bruno*
www.brunobraga.net
bruno.br...@gmail.com
On Tue, May 8, 2012 at 12:31 PM, bob gailer wrote:
> On 5/7/2012 1:16 PM, Cranky Frankie wrote:
>
>> In 3.2.2 in IDLE I have this dictionary entry:
>>
>> Namath = {"first_name": "Joe", "last_name": "Namath", "phone": "
>> 212-222-",\
>> "email": "joe.nam...@gmail.com", "stadium": "Shea Stadium"}
>>
>> when I print it:
>>
>> print(Namath)
>>
>> I get:
>>
>> {'phone': '212-222-', 'first_name': 'Joe', 'last_name': 'Namath',
>> 'email': 'joe.nam...@gmail.com', 'stadium': 'Shea Stadium'}
>>
>> Why is it out of order?
>>
>
> May I recommend a different approach to such questions.
>
> When you get an unexpected (undesired) result try saying - "Oh I see -
> that's how Python does it!"
>
> I want something different. How can I get it?
>
> Then try reading the documentation.
>
> Asking why does it not do what I want is not IMHO the best way to win
> friends here.
>
> Taking this steps further
> - what does it mean to be "in order". To some it is the order in which
> items are added rather than some collating sequence.
> - Do you want order by key or by value?
> - how would you order {1 : 'cat', "a": 3, (2,3): True}?
>
> --
> Bob Gailer
> 919-636-4239
> Chapel Hill NC
>
> __**_
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>
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