This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
We’ve previously seen how to create a nested function in Python.
If you return a nested function from a function, that nested function has access to the variables defined in that function, even if that function is not active any more.
Here is a simple counter example.
def counter():
count = 0
def increment():
nonlocal count
count = count + 1
return count
return increment
increment = counter()
print(increment()) # 1
print(increment()) # 2
print(increment()) # 3We return the increment() inner function, and that has still access to the state of the count variable even though the counter() function has ended.
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-01-08T05:00:00+00:00) Python Closures. Retrieved from https://www.scien.cx/2021/01/08/python-closures/
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