python-2.x

I have a code base that runs unchanged in Python 2.7 and 3.2+. But the doctests in the documentation rst files are giving me a headache. When I run them in Python2, I get UnicodeEncodeError: 'ascii' codec can't encode character u'\xb2' in position 16: ordinal not in range(128) . If I add .. testsetup:: * from __future__ import unicode_literals then I get a lot of errors like Expected: 'something' Got: u'something' Is there a way to have doctest containing unicode characters in the rst files that work unchanged in Python 2.7 and 3.2+? Make sure you are using Python 3.3. It added the explicit u

import MySQLdb db = MySQLdb.connect("localhost","root","password","database") cursor = db.cursor() cursor.execute("SELECT id FROM some_table") u_data = cursor.fetchall() >>> print u_data ((1320088L,),) What I found on internet got me till here: string = ((1320088L,),) string = ','.join(map(str, string)) >>> print string (1320088L,) what I expect output to look like: #Single element expected result 1320088L #comma separated list if more than 2 elements, below is an example 1320088L,1320089L Use itertools.chain_fromiterable() to flatten your nested tuples first, then map() to string and join() .

In python 3, int(50)<'2' causes a TypeError , and well it should. In python 2.x, however, int(50)<'2' returns True (this is also the case for other number formats, but int exists in both py2 and py3). My question, then, has several parts: Why does Python 2.x (< 3?) allow this behavior? (And who thought it was a good idea to allow this to begin with???) What does it mean that an int is less than a str ? Is it referring to ord / chr ? Is there some binary format which is less obvious? Is there a difference between '5' and u'5' in this regard? It works like this 1 . >>> float() == long() == int()

I am trying to write a list of a list to a new file, but I am getting this error: Traceback (most recent call last): File "", line 1, in dowork() File "C:\Python27\work\accounting\formatting quickbooks file\sdf.py", line 11, in dowork WriteFile() File "C:\Python27\work\accounting\formatting quickbooks file\sdf.py", line 71, in WriteFile f.write(thefile) TypeError: expected a character buffer object How do I write a list of a list to a file? This is how i am writing: def WriteFile(): global thefile f = open("output"+'.csv','w') f.seek(0) f.write(thefile) f.close() and here is the complete

I found something interesting, here is a snippet of code: class A(object): def __init__(self): print "A init" def __del__(self): print "A del" class B(object): a = A() If I run this code, I will get: A init But if I change class B(object) to class B() , I will get: A init A del I found a note in the __del__ doc : It is not guaranteed that del () methods are called for objects that still exist when the interpreter exits. Then, I guess it's because that B.a is still referenced(referenced by class B ) when the interpreter exists. So, I added a del B before the interpreter exists manually, and

I've got this piece of code: #!/usr/bin/env python def get_match(): cache=[] def match(v): if cache: return cache cache=[v] return cache return match m = get_match() m(1) if I run it, it says: UnboundLocalError: local variable 'cache' referenced before assignment but if I do this: #!/usr/bin/env python def get(): y = 1 def m(v): return y + v return m a=get() a(1) it runs. Is there something with list? or my code organizing is wrong? The problem is that the variable cache is not in the scope of the function match. This is not a problem if you only want to read it as in your second example, but