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Extract traceback info from an exception object
...__ attribute that contains the traceback. This attribute is also writable, and can be conveniently set using the with_traceback method of exceptions:
raise Exception("foo occurred").with_traceback(tracebackobj)
These features are minimally described as part of the raise documentation.
All credi...
Pythonic way to find maximum value and its index in a list?
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@SvenMarnach Why not key=lambda e: e[1] instead and thereby avoid the import?
– lifebalance
Aug 7 '17 at 6:19
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How to get a reference to current module's attributes in Python
What I'm trying to do would look like this in the command line:
3 Answers
3
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Are there legitimate uses for JavaScript's “with” statement?
...nking. I've seldom found a reason to use this particular language feature, and had never given much thought to how it might cause trouble. Now, I'm curious as to how I might make effective use of with , while avoiding its pitfalls.
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How do I find the location of Python module sources?
...king at themodule.__file__.
The datetime module, however, is written in C, and therefore datetime.__file__ points to a .so file (there is no datetime.__file__ on Windows), and therefore, you can't see the source.
If you download a python source tarball and extract it, the modules' code can be found...
`if __name__ == '__main__'` equivalent in Ruby
...m the Ruby I've seen out in the wild (granted, not a ton), this is not a standard Ruby design pattern. Modules and scripts are supposed to stay separate, so I wouldn't be surprised if there isn't really a good, clean way of doing this.
EDIT: Found it.
if __FILE__ == $0
foo()
bar()
end
Bu...
Unmangling the result of std::type_info::name
... information about the calling function. This should be relatively easy, standard C++ has a type_info class. This contains the name of the typeid'd class/function/etc. but it's mangled. It's not very useful. I.e. typeid(std::vector<int>).name() returns St6vectorIiSaIiEE .
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What does “#define _GNU_SOURCE” imply?
Today I had to use the basename() function, and the man 3 basename ( here ) gave me some strange message:
4 Answers
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How can I create a copy of an object in Python?
... you can use the copy.deepcopy() function.
For more details about shallow and deep copying please refer to the other answers to this question and the nice explanation in this answer to a related question.
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Finding the source code for built-in Python functions?
...rieving Source Code in the documentation of inspect.
For built-in classes and methods this is not so straightforward since inspect.getfile and inspect.getsource will return a type error stating that the object is built-in. However, many of the built-in types can be found in the Objects sub-director...