... Note that using count() instead of find() is never better but potentially worse. This is because find() will return after the first match, count() will always iterate over all elements. – Frerich Raabe Nov 9 '09 at 15:50 ...

...vs immutable types. __new__ accepts a type as the first argument, and (usually) returns a new instance of that type. Thus it is suitable for use with both mutable and immutable types. __init__ accepts an instance as the first argument and modifies the attributes of that instance. This is inappropr...

... Interrogate version string of already-installed distribution To retrieve the version from inside your package at runtime (what your question appears to actually be asking), you can use: import pkg_resources # part of setuptools version = pkg_resources.require("MyP...

Is there a way in Python to list all installed packages and their versions? 11 Answers ...

...az.bar == 50 assert foo.bar == 50 The setter didn't work at the time we call Bar.bar, because we are calling TypeOfBar.bar.__set__, which is not Bar.bar.__set__. Adding a metaclass definition solves this: class ClassPropertyMetaClass(type): def __setattr__(self, key, value): if key ...

...ization library Input/output library Regular expressions library I think all but the first one provide terrible support. I'll get back to it in more detail after a quick detour through your other questions. Does std::string do what it should? Yes. According to the C++ standard, this is what ...

...d eval have nothing to do with each other. An application that's fundamentally mis-designed is fundamentally mis-designed. eval is no more the root cause of bad design than division by zero or attempting to import a module which is known not to exist. eval isn't insecure. Applications are insecu...

...it test module is of the form test_*.py . I am attempting to make a file called all_test.py that will, you guessed it, run all files in the aforementioned test form and return the result. I have tried two methods so far; both have failed. I will show the two methods, and I hope someone out there ...

... It is generally a bad pattern to kill a thread abruptly, in Python and in any language. Think of the following cases: the thread is holding a critical resource that must be closed properly the thread has created several other threads ...

...to declare it explicitly. When you create an instance of the A class and call its methods, it will be passed automatically, as in ... a = A() # We do not pass any argument to the __init__ method a.method_a('Sailor!') # We only pass a single argument The __init__ method is roughly w...