I am Python newbie, so maybe don't knew if this is obvious or not.
In Javascript a||b returns a if a is evaluated to true, else returns b.
Is that possible in Python other than lengthy if else statement.
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4 Answers
I believe this is correct:
x = a or b
Proof
This is how "||" works in JavaScript:
> 'test' || 'again'
"test"
> false || 'again'
"again"
> false || 0
0
> 1 || 0
1
This is how "or" works in Python:
>>> 'test' or 'again'
'test'
>>> False or 'again'
'again'
>>> False or 0
0
>>> 1 or 0
1
Comments
In python you can use something like this
result = a or b
which may give you result=a if a is not False (ie not None, not empty, not 0 length), else you will get result=b
1 Comment
Tadeck
Basically it could be explained by showing these two statements as having the same effect:
result = a or b, result = a if a else b (or longer: if a: result = a [line break] else: result = b). Upvoting anyway (for being correct).You can simply do
a or b
For more complex logic (only for Python 2.5 and above):
x if a > b else y
This is the equivalent to the following which you may be familiar with from Javascript:
a > b ? x : y;
Comments
x = a or b does the same thing.
