if 'string1' in line: ...
... works as expected but what if I need to check multiple strings like so:
if 'string1' or 'string2' or 'string3' in line: ...
... doesn't seem to work.
views:
101answers:
4
+6
A:
if any(s in line for s in ('string1', 'string2', ...)):
Ignacio Vazquez-Abrams
2010-02-22 05:13:21
+1
A:
if 'string1' in line or 'string2' in line or 'string3' in line:
Would that be fine for what you need to do?
aldld
2010-02-22 05:17:09
Ofcourse, thats what I tried but I needed a more readable and efficient method. :)
Nimbuz
2010-02-22 05:18:51
+1
A:
or does not behave that way. 'string1' or 'string2' or 'string3' in line is equivalent to ('string1') or ('string2') or ('string3' in line), which will always return true (actually, 'string1').
To get the behavior you want, you can say if any(s in line for s in ('string1', 'string2', 'string3')):.
Mike Graham
2010-02-22 05:17:45
+1
A:
If you read the expression like this
if ('string1') or ('string2') or ('string3' in line):
The problem becomes obvious. What will happen is that 'string1' evaluates to True so the rest of the expression is shortcircuited.
The long hand way to write it is this
if 'string1' in line or 'string2' in line or 'string3' in line:
Which is a bit repetitive, so in this case it's better to use any() like in Ignacio's answer
gnibbler
2010-02-22 05:21:12