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python Programming Glossary: unlessWhy is if not someobj: better than if someobj == None: in Python? http://stackoverflow.com/questions/100732/why-is-if-not-someobj-better-than-if-someobj-none-in-python length is zero . Otherwise the object is considered True unless it is None in which case it is considered False . In the second..
Common pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python many years. I usually don't use mutable default arguments unless needed but I think with time I forgot about that. Today in the.. to get the object attribute it will gives you its value unless it's empty. In that case it will return the class attributes... you'll get the same object shared across instances. Don't unless you want static class Car object color red wheels wheel Wheel..
http://stackoverflow.com/questions/1151658/python-hashable-dicts see different grammars so cached parse results are invalid unless I also store the current version of the grammar along with the..
Remove items from a list while iterating in Python http://stackoverflow.com/questions/1207406/remove-items-from-a-list-while-iterating-in-python is correct you will lose reference to the original list unless you do it this way see Alex Martelli's answer for details ...
What is a global interpreter lock (GIL)? http://stackoverflow.com/questions/1294382/what-is-a-global-interpreter-lock-gil a Python developer you don't generally come across the GIL unless you're writing a C extension. C extension writers need to release..
Python string 'join' is faster(?) than '+', but what's wrong here? http://stackoverflow.com/questions/1349311/python-string-join-is-faster-than-but-whats-wrong-here midriff by the oncoming trailer truck of a 200 slowdown unless you get unlucky and it's a 2000 one . Just remember if you ever..
What limitations have closures in Python compared to language X closures? http://stackoverflow.com/questions/141642/what-limitations-have-closures-in-python-compared-to-language-x-closures assigned to in a local scope a function is always local unless declared otherwise. While there is the 'global' declaration..
http://stackoverflow.com/questions/1819124/image-comparison-algorithm correleation of the RGB values which works also quite good unless the pictures are a litte bit shifted. So if a have a 100 identical..
In Python, what is the difference between '/' and '//' when used for division? http://stackoverflow.com/questions/183853/in-python-what-is-the-difference-between-and-when-used-for-division later in the 2.x line there is no difference for integers unless you perform a from __future__ import division which causes Python..
http://stackoverflow.com/questions/228181/the-zen-of-python to do it. Although that way may not be obvious at first unless you're Dutch. Now is better than never. Although never is often..
Why use pip over easy_install? http://stackoverflow.com/questions/3220404/why-use-pip-over-easy-install over easy_install A tweet reads Don't use easy_install unless you like stabbing yourself in the face. Use pip. Why use pip..
Which game scripting language is better to use: Lua or Python? [closed] http://stackoverflow.com/questions/356160/which-game-scripting-language-is-better-to-use-lua-or-python Lua several years ago now but it is not so easy to find unless you know where to look or ask on the mailing list . The entire..
What is the difference between encode/decode? http://stackoverflow.com/questions/447107/what-is-the-difference-between-encode-decode strings really doesn't have any applications at all unless you have some non text data in a unicode string for some reason..
Using only the DB part of Django http://stackoverflow.com/questions/579511/using-only-the-db-part-of-django But it is an aspect of the ORM that is not available unless you put some effort into setup. Secondly consider how you would..
mkdir -p functionality in python http://stackoverflow.com/questions/600268/mkdir-p-functionality-in-python that when true enables the mkdir p functionality em unless mode is provided and the existing directory has different permissions..
Python's use of __new__ and __init__? http://stackoverflow.com/questions/674304/pythons-use-of-new-and-init created. In general you shouldn't need to override __new__ unless you're subclassing an immutable type like str int unicode or..
Recommendations of Python REST (web services) framework? [closed] http://stackoverflow.com/questions/713847/recommendations-of-python-rest-web-services-framework respectively . HTTP verbs are very important in REST and unless you're very careful about this you'll end up falling into a..
local var referenced before assignment http://stackoverflow.com/questions/8934772/local-var-referenced-before-assignment defined in the innermost scope before the name is accessed unless the global statement was used . In your code the line c 3 is..
Python metaclasses: Why isn't __setattr__ called for attributes set during class definition? http://stackoverflow.com/questions/10762088/python-metaclasses-why-isnt-setattr-called-for-attributes-set-during-class what's going on not your metaclass. So you're out of luck. Unless you're using Python 3.x In Python 3.x you can define a __prepare__..
How to query GAE datastore to render a template (newbie level) http://stackoverflow.com/questions/11311461/how-to-query-gae-datastore-to-render-a-template-newbie-level at # # http www.apache.org licenses LICENSE 2.0 # # Unless required by applicable law or agreed to in writing software..
Showing the stack trace from a running Python application http://stackoverflow.com/questions/132058/showing-the-stack-trace-from-a-running-python-application # Allow access to frame object. d.update frame.f_globals # Unless shadowed by global d.update frame.f_locals i code.InteractiveConsole..
Is there a way to convert pyplot.imshow() object to numpy array? http://stackoverflow.com/questions/14869321/is-there-a-way-to-convert-pyplot-imshow-object-to-numpy-array opencv numpy matplotlib share improve this question Unless you really need the marker ticks and such im._rgba_cache gives..
How to make a python script run like a service or daemon in linux http://stackoverflow.com/questions/1603109/how-to-make-a-python-script-run-like-a-service-or-daemon-in-linux multiple simple tools interact and solve your problems. Unless there are additional reasons why you should make a daemon in..
http://stackoverflow.com/questions/163009/urllib2-file-name using filename url.split ' ' 1 .split '#' 0 .split ' ' 0 Unless I'm mistaken this should strip out all potential queries as..
Understanding Generators in Python? http://stackoverflow.com/questions/1756096/understanding-generators-in-python why you would use it Without quoting any books obviously Unless you can find a decent simplistic answer direct from a book ...
Build Python scripts and call methods from C# http://stackoverflow.com/questions/2139202/build-python-scripts-and-call-methods-from-c-sharp cannot access the Python methods directly from C# code. Unless you are playing with C# 4.0 and the dynamic keyword or you are..
http://stackoverflow.com/questions/2241600/python-regex-r-prefix r' n' n ' s' ' s' r' s' ' s' print ' s' s print r' s' s Unless an 'r' or 'R' prefix is present escape sequences in strings..
http://stackoverflow.com/questions/228181/the-zen-of-python beats purity. Errors should never pass silently. Unless explicitly silenced. In the face of ambiguity refuse the temptation..
How can I retrieve the signal strength of nearby wireless LAN networks on Windows using Python? http://stackoverflow.com/questions/2851233/how-can-i-retrieve-the-signal-strength-of-nearby-wireless-lan-networks-on-window Both of these managers can be queried using dbus . Unless you can control what the clients have on their systems you might..
How is the 'is' keyword implemented in Python? http://stackoverflow.com/questions/2987958/how-is-the-is-keyword-implemented-in-python strings with is only works when the strings are interned. Unless you really know what you're doing and explicitly interned the..
Statistics: combinations in Python http://stackoverflow.com/questions/3025162/statistics-combinations-in-python share improve this question See scipy.misc.comb . Unless exact answers are requested it uses the gammaln function to..
F# vs IronPython: When is one preferred to the other? http://stackoverflow.com/questions/3327885/f-vs-ironpython-when-is-one-preferred-to-the-other already code in that style that's what you get. Unless you have some really hardcore and slightly masochistic FP enthusiasts..
Why doesn't Python have multiline comments? http://stackoverflow.com/questions/397148/why-doesnt-python-have-multiline-comments tip You can use multi line strings as multi line comments. Unless used as docstrings they generate no code share improve this..
How can you dynamically create variables in Python via a while loop? http://stackoverflow.com/questions/5036700/how-can-you-dynamically-create-variables-in-python-via-a-while-loop this python variables share improve this question Unless there is an overwhelming need to create a mess of variable names..
Python - How to check if a file is used by another application? http://stackoverflow.com/questions/589407/python-how-to-check-if-a-file-is-used-by-another-application will fail. this is extremely intrusive and error prone. Unless both the new application and the legacy application need synchronized..
How the method resolution and invocation works internally in Python? http://stackoverflow.com/questions/852308/how-the-method-resolution-and-invocation-works-internally-in-python then the value from the class lookup is returned. Unless it happens to be a non data descriptor i.e. it has the __get__.. to explain here so if you're interested see this article . Unless you are doing some really funky inheritance hierarchies and..
Choosing between Java and Python http://stackoverflow.com/questions/954164/choosing-between-java-and-python but it's an option that's easier in Python than Java. Unless you make use of some Python features multiple inheritance operator..
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