Re: [Tutor] Naming variables

[Wiktor Matuszewski]

W dniu 2014-01-18 19:20, Pierre Dagenais pisze:


I wish to fill a list called years[] with a hundred lists called
year1900[], year1901[], year1902[], ..., year1999[]. That is too much
typing of course. Any way of doing this in a loop? I've tried stuff like
("year" + str(1900)) = [0,0] but nothing works.
Any solution?


Hi,
I don't know the solution, or if there is one.
And because of that, if I were you I would try to contain this data in 
different way. Why not dictionary?


years = {1900: [0,0], 1901: [0,0], ..., 1999: [0,0]}

Initiating this dictionary with empty (or [0,0]) one hundred lists would 
be easy with for loop. Accessing/changing list representing particular 
year is much more easier: years[1980].


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'py{}@wu{}em.pl'.format('wkm', 'ka')  |  newbie
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Re: [Tutor] Naming variables

[Wiktor Matuszewski]

W dniu 2014-01-18 19:20, Pierre Dagenais pisze:

I wish to fill a list called years[] with a hundred lists called
year1900[], year1901[], year1902[], ..., year1999[]. That is too much
typing of course. Any way of doing this in a loop? I've tried stuff like
("year" + str(1900)) = [0,0] but nothing works.
Any solution?


>>> y = 1900
>>> exec('year{} = [0, 0]'.format(y))
>>> year1900
[0, 0]

But I still think, that solution with dict with lists is better.

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Best regards, Wiktor Matuszewski  |  Python
'py{}@wu{}em.pl'.format('wkm', 'ka')  |  newbie
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Re: [Tutor] most useful ide

[Wiktor Matuszewski]

W dniu 2014-02-02 18:56, Albert-Jan Roskam pisze:
>> On 02/02/14 08:25, Ian D wrote:
>>
>>> Are there any recommendations for python ide's
>>
>> Lots depending who you ask...
>
> If you ask me: Spyder (free) or PyCharm (free for open source 
projects) ;-)


There is also PyCharm Community Edition. Free for all projects.
And if you'd ask me, it would be my answer. :)

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Wiktor Matuszewski
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[Tutor] Project tree

[Wiktor Matuszewski]

Hi,
let's assume I have this project tree:

project_name/
 |-src/
 |  |- __init__.py
 |  |- moda.py
 |  '- modb.py
 '- start.py

And individual files contain:

- modb.py: -
def hello(txt):
return "Hello " + txt + "!"

def plus1(num):
return num + 1


- moda.py: -
import modb

def hello_world():
return modb.hello("World")


- start.py: -
from src import moda, modb

print(moda.hello_world())
print(modb.plus1(41))


__init__.py is empty

(it's project for my purpose - I don't want to distribute it with pypi, 
I pulled out start.py form src folder to just run everything without 
opening src folder)


Ok, so now executing start.py works in Python 2.7(*), but doesn't work 
in Python 3.4(**). Can someone, please, explain me why? What changed 
between 2.x and 3.x versions?


*) - gives output:
Hello World!
42

**) - gives error message:
Traceback (most recent call last):
  File "E:\tests\project_name\start.py", line 1, in 
from src import moda
  File "E:\tests\project_name\src\moda.py", line 1, in 
import modb
ImportError: No module named 'modb'

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Wiktor Matuszewski
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