Basic Code Review

Please review this Python function that calculates factorial : def factorial ( n ) : if n < 0 : return None if n == 0 : return 1 return n * factorial ( n - 1 )…

Please review this Python function that calculates factorial
:
def
factorial
(
n
)
:
if
n
<
0
:
return
None
if
n
==
0
:
return
1
return
n
* factorial
(
n
- 1
)
Focus on
:
1.
Error handling
2.
Performance
3.
Edge cases
4.
Coding standards

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