Hi,
I am reading a book where it says that:
Just like module-level function definitions, the definition of a local function
happens at run time when the def keyword is executed. Interestingly, this means
that each call to sort_by_last_letter results in a new definition of the
function last_letter. That is, just like any other name bound in a function
body, last_letter is bound separately to a new function each time
sort_by_last_letter is called.
If that above is true, why the below program shows the same object reference
for last_letter every time I call function sort_by_last_letter.
# file name is sample.py
def sort_by_last_letter(strings):
def last_letter(s):
return s[-1]
print(last_letter)
return sorted(strings, key=last_letter)
python3 -i sample.py
>>> sort_by_last_letter(['ghi', 'def', 'abc'])
<function sort_by_last_letter.<locals>.last_letter at 0x1051e0730>
['abc', 'def', 'ghi']
>>> sort_by_last_letter(['ghi', 'def', 'abc'])
<function sort_by_last_letter.<locals>.last_letter at 0x1051e0730>
['abc', 'def', 'ghi']
>>> sort_by_last_letter(['ghi', 'def', 'abckl'])
<function sort_by_last_letter.<locals>.last_letter at 0x1051e0730>
['def', 'ghi', 'abckl']
>>>
Thanks,
Arup Rakshit
a...@zeit.io
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