[Tutor] educational

2014-03-09 Thread MICHAEL BASHAGI 
i wanted to use a .jpeg image file on a label in a small program that am
building in Python, i use Window 7 professional OS, and Python 3.4here
are my codes:-
import sys
from tkinter import *

#Window
mGui=Tk()

mGui.geometry("1000x500")
mGui.title("Kamusi")

#Functions

#Variables
ment=StringVar()
#Images
image = Image.open("logo.jpg")
photo = ImageTk.PhotoImage(image)
#Widgets
Logo=Label(mGui,image=photo,width=510,height=150)
Logo.grid(row=0,column=3)

when i run those codes i get this error message:-
AttributeError: type object 'Image' has no attribute 'open'
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Ben Finney 
Welcome, Michael!

MICHAEL BASHAGI  writes:

> when i run those codes i get this error message:-

When showing an error, please show the entire traceback; it usually
contains information useful for diagnosing the problem.

> AttributeError: type object 'Image' has no attribute 'open'

In this case, I'm fairly sure the line producing this error is::

image = Image.open("logo.jpg")

And Python is correct, the ‘Image’ type has no ‘open’ attribute. What
leads you to think that would work? If there is some article online
telling you to use that, it's incorrect; please help us to correct that.

It's best not to guess what attributes are in a type (otherwise known as
the “API” for the type). Instead, consult the documentation. For
Tkinter, that is http://www.python.org/topics/tkinter/>.

-- 
 \“Most people, I think, don't even know what a rootkit is, so |
  `\ why should they care about it?” —Thomas Hesse, Sony BMG, 2006 |
_o__)  |
Ben Finney

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Ben Finney 
Ben Finney  writes:

> It's best not to guess what attributes are in a type (otherwise known as
> the “API” for the type). Instead, consult the documentation. For
> Tkinter, that is http://www.python.org/topics/tkinter/>.

My apologies; there's a broken link in the documentation.

Use this instead http://docs.python.org/3/library/tkinter.html>.

-- 
 \  “I busted a mirror and got seven years bad luck, but my lawyer |
  `\thinks he can get me five.” —Steven Wright |
_o__)  |
Ben Finney

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Peter Otten 
Ben Finney wrote:

> Welcome, Michael!
> 
> MICHAEL BASHAGI  writes:
> 
>> when i run those codes i get this error message:-
> 
> When showing an error, please show the entire traceback; it usually
> contains information useful for diagnosing the problem.
> 
>> AttributeError: type object 'Image' has no attribute 'open'
> 
> In this case, I'm fairly sure the line producing this error is::
> 
> image = Image.open("logo.jpg")
> 
> And Python is correct, the ‘Image’ type has no ‘open’ attribute. What
> leads you to think that would work? If there is some article online
> telling you to use that, it's incorrect; please help us to correct that.

There are a few things around called `Image`. The code the OP is trying to 
adapt probably uses the Image from the PIL:

import tkinter
from PIL import ImageTk
from PIL import Image

mGui = tkinter.Tk()

image = Image.open("logo.jpg")
photo = ImageTk.PhotoImage(image=image)

Logo = tkinter.Label(mGui, image=photo)
Logo.grid(row=0, column=3)

mGui.mainloop()

This can be simplified:

import tkinter
from PIL import ImageTk

mGui = tkinter.Tk()
photo = ImageTk.PhotoImage(file="logo.jpg")

Logo = tkinter.Label(mGui, image=photo)
Logo.grid(row=0, column=3)

mGui.mainloop()


___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Alan Gauld 

On 09/03/14 10:37, Peter Otten wrote:


In this case, I'm fairly sure the line producing this error is::

 image = Image.open("logo.jpg")

And Python is correct, the ‘Image’ type has no ‘open’ attribute. What


There are a few things around called `Image`. The code the OP is trying to
adapt probably uses the Image from the PIL:



Which may lead to another issue since the OP is using Python 3.4.

Is PIL available for any Python 3.x yet?
And especially for 3.4?

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Tim Golden 

On 09/03/2014 17:06, Alan Gauld wrote:

On 09/03/14 10:37, Peter Otten wrote:


In this case, I'm fairly sure the line producing this error is::

 image = Image.open("logo.jpg")

And Python is correct, the ‘Image’ type has no ‘open’ attribute. What


There are a few things around called `Image`. The code the OP is
trying to
adapt probably uses the Image from the PIL:



Which may lead to another issue since the OP is using Python 3.4.

Is PIL available for any Python 3.x yet?
And especially for 3.4?



Pillow does seem to (haven't used it myself):

http://pillow.readthedocs.org/en/latest/installation.html

TJG
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Ben Finney 
Peter Otten <__pete...@web.de> writes:

> Ben Finney wrote:
> > And Python is correct, the ‘Image’ type has no ‘open’ attribute. What
> > leads you to think that would work? If there is some article online
> > telling you to use that, it's incorrect; please help us to correct that.
>
> There are a few things around called `Image`. The code the OP is trying to 
> adapt probably uses the Image from the PIL:

Then I'm further confirmed in my view that ‘from tkinter import *’ is
dreadful practice, especially for a system we recommend to newcomers.

If it were::

> import tkinter
> from PIL import ImageTk
> from PIL import Image

then it would be clear which “Image” is being used where.

Now all I need is for the Tkinter-using community to change itself to
fix this confusing practice. I won't hold my breath.

-- 
 \ Rommel: “Don't move, or I'll turn the key on this can of Spam!” |
  `\   —The Goon Show, _Rommel's Treasure_ |
_o__)  |
Ben Finney

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Alan Gauld 

On 09/03/14 19:56, Ben Finney wrote:


Then I'm further confirmed in my view that ‘from tkinter import *’ is
dreadful practice, especially for a system we recommend to newcomers.


Its always dreadful practice for production code regardless of the 
module. Its OK for playing at the >>> prompt but not much more.


I usually import Tkinter as

import tkinter as tk


Now all I need is for the Tkinter-using community to change itself to
fix this confusing practice. I won't hold my breath.


I don't find everyone in the Tkinter community using from tkinter import 
*, quite a few use normal practice. But historically I agree

it's been an unfortunate paradigm, Even the IDLE code uses
import * :-(


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Mark Lawrence 

On 09/03/2014 21:35, Alan Gauld wrote:

On 09/03/14 19:56, Ben Finney wrote:


Then I'm further confirmed in my view that ‘from tkinter import *’ is
dreadful practice, especially for a system we recommend to newcomers.


Its always dreadful practice for production code regardless of the
module. Its OK for playing at the >>> prompt but not much more.

I usually import Tkinter as

import tkinter as tk


Now all I need is for the Tkinter-using community to change itself to
fix this confusing practice. I won't hold my breath.


I don't find everyone in the Tkinter community using from tkinter import
*, quite a few use normal practice. But historically I agree
it's been an unfortunate paradigm, Even the IDLE code uses
import * :-(




I vaguely recall reading somewhere that IDLE is moving towards 'ímport 
tkinter as tk', a process which would certainly be helped by the 
extremely sensible PEP 434 http://legacy.python.org/dev/peps/pep-0434/


--
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.


Mark Lawrence

---
This email is free from viruses and malware because avast! Antivirus protection 
is active.
http://www.avast.com


___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] educational

2014-03-09 Thread Ben Finney 
Alan Gauld  writes:

> On 09/03/14 19:56, Ben Finney wrote:
> > Now all I need is for the Tkinter-using community to change itself
> > to fix this confusing practice [‘from tkinter import *’]. I won't
> > hold my breath.
>
> I don't find everyone in the Tkinter community using from tkinter
> import *, quite a few use normal practice.

Then they are not following the advice of the documentation
http://docs.python.org/3/library/tkinter.html>, which explicitly
recommends ‘from tkinter import *’.

It's also prevalent in third-party http://effbot.org/tkinterbook/>
http://www.tkdocs.com/> documents which are referenced from the
official documentation.

This one http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/> does
at least get it right. If ‘import tkinter as tk’ were to become the norm
in official and third-party documentation, I'd agree the problem would
be solved at that point.

-- 
 \  “One bad programmer can easily create two new jobs a year. |
  `\  Hiring more bad programmers will just increase our perceived |
_o__) need for them.” —David Lorge Parnas, 1999-03 |
Ben Finney

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

[Tutor] improvements on a renaming script

2014-03-09 Thread street . sweeper 
Hello all,

A bit of background, I had some slides scanned and a 3-character
slice of the file name indicates what roll of film it was.
This is recorded in a tab-separated file called fileNames.tab.
Its content looks something like:

p01 200511_autumn_leaves
p02 200603_apple_plum_cherry_blossoms

The original file names looked like:

1p01_abc_0001.jpg
1p02_abc_0005.jpg

The renamed files are:

200511_autumn_leaves_-_001.jpeg
200603_apple_plum_cherry_blossoms_-_005.jpeg

The script below works and has done what I wanted, but I have a
few questions:

- In the get_long_names() function, the for/if thing is reading
the whole fileNames.tab file every time, isn't it?  In reality,
the file was only a few dozen lines long, so I suppose it doesn't
matter, but is there a better way to do this?

- Really, I wanted to create a new sequence number at the end of
each file name, but I thought this would be difficult.  In order
for it to count from 01 to whatever the last file is per set p01,
p02, etc, it would have to be aware of the set name and how many
files are in it.  So I settled for getting the last 3 digits of
the original file name using splitext().  The strings were unique,
so it worked out.  However, I can see this being useful in other
places, so I was wondering if there is a good way to do this.
Is there a term or phrase I can search on?

- I'd be interested to read any other comments on the code.
I'm new to python and I have only a bit of computer science study,
quite some time ago.


#!/usr/bin/env python3

import os
import csv

# get longnames from fileNames.tab
def get_long_name(glnAbbrev):
with open(
  os.path.join(os.path.expanduser('~'),'temp2','fileNames.tab')
  ) as filenames:
filenamesdata = csv.reader(filenames, delimiter='\t')
for row in filenamesdata:
if row[0] == glnAbbrev:
return row[1]

# find shortname from slice in picture filename
def get_slice(fn):
threeColSlice = fn[1:4]
return threeColSlice

# get 3-digit sequence number from basename
def get_bn_seq(fn):
seq = os.path.splitext(fn)[0][-3:]
return seq

# directory locations
indir = os.path.join(os.path.expanduser('~'),'temp4')
outdir = os.path.join(os.path.expanduser('~'),'temp5')

# rename
for f in os.listdir(indir):
if f.endswith(".jpg"):
os.rename(
os.path.join(indir,f),os.path.join(
outdir,

get_long_name(get_slice(f))+"_-_"+get_bn_seq(f)+".jpeg")
)

exit()


Thanks!
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] improvements on a renaming script

2014-03-09 Thread bob gailer 

On 3/9/2014 3:22 PM, street.swee...@mailworks.org wrote:

Hello all,

A bit of background, I had some slides scanned and a 3-character
slice of the file name indicates what roll of film it was.
This is recorded in a tab-separated file called fileNames.tab.
Its content looks something like:

p01 200511_autumn_leaves
p02 200603_apple_plum_cherry_blossoms

The original file names looked like:

1p01_abc_0001.jpg
1p02_abc_0005.jpg

The renamed files are:

200511_autumn_leaves_-_001.jpeg
200603_apple_plum_cherry_blossoms_-_005.jpeg

The script below works and has done what I wanted, but I have a
few questions:

- In the get_long_names() function, the for/if thing is reading
the whole fileNames.tab file every time, isn't it?  In reality,
the file was only a few dozen lines long, so I suppose it doesn't
matter, but is there a better way to do this?
The "usual" way is to create a dictionary with row[0] contents as keys 
and row[1] contents as values. Do this once per run. Then lookup each 
glnAbbrev in the dictionary and return the corresponding value.

- Really, I wanted to create a new sequence number at the end of
each file name, but I thought this would be difficult.  In order
for it to count from 01 to whatever the last file is per set p01,
p02, etc, it would have to be aware of the set name and how many
files are in it.  So I settled for getting the last 3 digits of
the original file name using splitext().  The strings were unique,
so it worked out.  However, I can see this being useful in other
places, so I was wondering if there is a good way to do this.
Is there a term or phrase I can search on?
I'm  sorry but I don't fully understand that paragraph. And why would 
you need to know the number of files?

- I'd be interested to read any other comments on the code.
I'm new to python and I have only a bit of computer science study,
quite some time ago.
Beware using tabs as indents. As rendered by Thunderbird they appear as 
8 spaces which is IMHO overkill.
It is much better to use spaces. Most Python IDEs have an option to 
convert tabs to spaces.


The Python recommendation is 4; I use 2.

#!/usr/bin/env python3

import os
import csv

# get longnames from fileNames.tab
def get_long_name(glnAbbrev):
with open(
  os.path.join(os.path.expanduser('~'),'temp2','fileNames.tab')
  ) as filenames:
filenamesdata = csv.reader(filenames, delimiter='\t')
for row in filenamesdata:
if row[0] == glnAbbrev:
return row[1]

# find shortname from slice in picture filename
def get_slice(fn):
threeColSlice = fn[1:4]
return threeColSlice

Writing a function to get a slice seems overkill also. Just slice in place.

# get 3-digit sequence number from basename
def get_bn_seq(fn):
seq = os.path.splitext(fn)[0][-3:]
return seq

# directory locations
indir = os.path.join(os.path.expanduser('~'),'temp4')
outdir = os.path.join(os.path.expanduser('~'),'temp5')

# rename
for f in os.listdir(indir):
if f.endswith(".jpg"):
os.rename(
os.path.join(indir,f),os.path.join(
outdir,

get_long_name(get_slice(f))+"_-_"+get_bn_seq(f)+".jpeg")
)

exit()

HTH - remember to reply-all so a copy goes to the list, place your 
comments in-line as I did, and delete irrelevant text.

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with Guess the number script

2014-03-09 Thread eryksun 
> On Mar 8, 2014, at 7:29 AM, eryksun  wrote:
>>
>>not not (guess < 1 or guess > 100)
>
> Why a not not?  Wouldn’t that just be saying do this because the
> second not is undoing the first?

In boolean algebra, `not (A or B)` is equivalent to `not A and not B`
(De Morgan's law). I double negated in order to mechanically apply
this rule, e.g.

A or B
= not not (A or B)
= not (not A and not B)

>> Anyway, you needn't go out of your way to rewrite the expression using
>> a chained comparison. The disjunctive expression is actually
>> implemented more efficiently by CPython's compiler, which you can
>> verify using the dis module to disassemble the bytecode.
>
> I’m not sure what you’re talking about in the above paragraph.

There's hardly any difference in how the interpreter evaluates the
code in a simple case like this, and it's actually slightly more
efficient (in CPython) without chaining. That said, chained
comparisons are more efficient when the expressions being compared are
computationally expensive, since each expression is only evaluated
once.

Regarding bytecode, CPython compiles Python source code to a sequence
of bytecode operations that get interpreted at runtime. It's an
implementation detail, but examining CPython bytecode is nonetheless
informative. Here's a basic example:

>>> def f():
... x = 'abc'

The function's code object contains the compiled code as a byte sting
in its co_code attribute:

>>> f.__code__.co_code
b'd\x01\x00}\x00\x00d\x00\x00S'

This assembled code isn't easy to read. Also, reading it requires
referencing other fields of the code object such as co_consts and
co_varnames. The dis module disassembles it to a form that's a bit
easier to read:

>>> dis.dis(f)
  2   0 LOAD_CONST   1 ('abc')
  3 STORE_FAST   0 (x)
  6 LOAD_CONST   0 (None)
  9 RETURN_VALUE

The documentation for the dis module includes a basic description of
each operation.

http://docs.python.org/3/library/dis
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor