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Showing posts with the label Python Internals
Why Does '20000 Is 20000' Result In True?

Why Does '20000 Is 20000' Result In True?

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is in Python tests if 2 references point to the same object. Numbers between -5 and 256 are cached … Read more Why Does '20000 Is 20000' Result In True?
Python 3 Integer Addresses

Python 3 Integer Addresses

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x=300 y=300 print(id(x),id(y)) a=[300,300] print(id(a[0]),id(a[1])) On executing above code I get … Read more Python 3 Integer Addresses
Python Dictionary Iterator Performance

Python Dictionary Iterator Performance

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When working with dictionaries in Python, this page says that the time complexity of iterating thro… Read more Python Dictionary Iterator Performance
Is An Explicit Nul-byte Necessary At The End Of A Bytearray For Cython To Be Able To Convert It To A Null-terminated C-string

Is An Explicit Nul-byte Necessary At The End Of A Bytearray For Cython To Be Able To Convert It To A Null-terminated C-string

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When converting a bytearray-object (or a bytes-object for that matter) to a C-string, the cython-do… Read more Is An Explicit Nul-byte Necessary At The End Of A Bytearray For Cython To Be Able To Convert It To A Null-terminated C-string
Converting A Series Of Ints To Strings - Why Is Apply Much Faster Than Astype?

Converting A Series Of Ints To Strings - Why Is Apply Much Faster Than Astype?

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I have a pandas.Series containing integers, but I need to convert these to strings for some downstr… Read more Converting A Series Of Ints To Strings - Why Is Apply Much Faster Than Astype?
Python: Why Are * And ** Faster Than / And Sqrt()?

Python: Why Are * And ** Faster Than / And Sqrt()?

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While optimising my code I realised the following: >>> from timeit import Timer as T >&… Read more Python: Why Are * And ** Faster Than / And Sqrt()?