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  • python - What does the caret (^) operator do? - Stack Overflow
    Side note, seeing as Python defines this as an xor operation and the method name has "xor" in it, I would consider it a poor design choice to make that method do something not related to xor like exponentiation I think it's a good illustrative example of how it simply calls the __xor__ method, but to do that for real would be bad practice
  • What does colon equal (:=) in Python mean? - Stack Overflow
    In Python this is simply = To translate this pseudocode into Python you would need to know the data structures being referenced, and a bit more of the algorithm implementation Some notes about psuedocode: := is the assignment operator or = in Python = is the equality operator or == in Python There are certain styles, and your mileage may vary:
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    What does the percentage sign mean in Python [duplicate] Asked 16 years, 1 month ago Modified 1 year, 8 months ago Viewed 349k times
  • python - What is the purpose of the -m switch? - Stack Overflow
    Python 2 4 adds the command line switch -m to allow modules to be located using the Python module namespace for execution as scripts The motivating examples were standard library modules such as pdb and profile, and the Python 2 4 implementation is fine for this limited purpose
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    I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3]?
  • python - Iterating over dictionaries using for loops - Stack Overflow
    Why is it 'better' to use my_dict keys() over iterating directly over the dictionary? Iteration over a dictionary is clearly documented as yielding keys It appears you had Python 2 in mind when you answered this, because in Python 3 for key in my_dict keys() will still have the same problem with changing the dictionary size during iteration
  • What does [:-1] mean do in python? - Stack Overflow
    Working on a python assignment and was curious as to what [:-1] means in the context of the following code: instructions = f readline()[:-1] Have searched on here on S O and on Google but to no avail
  • python - Errno 13 Permission denied - Stack Overflow
    For future searchers, if none of the above worked, for me, python was trying to open a folder as a file Check at the location where you try to open the file, if you have a folder with exactly the same name as the file you try to open (the file extension is part of the file name)




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