Linked Questions
116 questions linked to/from How do "and" and "or" act with non-boolean values?
40
votes
4
answers
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and / or operators return value [duplicate]
I was watching a 2007 video on Advanced Python or Understanding Python, and at 18'27" the speaker claims "As some may know in Python and and or return one of the two values, whereas not returns always ...
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37
votes
7
answers
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views
Python's Logical Operator AND [duplicate]
I'm a little confused with the results I'm getting with the logical operators in Python. I'm a beginner and studying with the use of a few books, but they don't explain in as much detail as I'd like.
...
- 1,416
22
votes
4
answers
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if 'a' or 'b' in L, where L is a list [duplicate]
I am having trouble with the following logic:
Lets say I have a list:
L = ['a', 'b', 'c']
Both items are in the list...
if ('a' or 'b') in L:
print "It's there!"
else:
print 'No ...
- 4,164
14
votes
7
answers
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How do "and" and "or" work when combined in one statement? [duplicate]
For some reason this function confused me:
def protocol(port):
return port == "443" and "https://" or "http://"
Can somebody explain the order of what's happening behind the scenes to make this ...
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27
votes
2
answers
25k
views
How does the logical `and` operator work with integers? [duplicate]
So, I was playing with the interpreter, and typed in the following:
In [95]: 1 and 2
Out[95]: 2
In [96]: 1 and 5
Out[96]: 5
In [97]: 234324 and 2
Out[97]: 2
In [98]: 234324 and 22343243242
Out[98]:...
- 441
12
votes
2
answers
18k
views
Evaluation of boolean expressions in Python [duplicate]
What truth value do objects evaluate to in Python?
Related Questions
Boolean Value of Objects in Python: Discussion about overriding the way it is evaluated
- 120k
6
votes
2
answers
3k
views
Assigning string with boolean expression [duplicate]
I am trying to understand this code from someone else's project. If you want the context it's here: https://github.com/newsapps/beeswithmachineguns/blob/master/beeswithmachineguns/bees.py#L501
IS_PY2 ...
- 361
1
vote
5
answers
2k
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How do 'and' and 'or' act with non-boolean values in Python? [duplicate]
22 and 333/12 or 1
I have encountered the above line of code. The result is 27, but I could not quite understand what does and and or mean in this case. Can somebody explain to me, preferred with ...
- 3,228
3
votes
6
answers
4k
views
How does boolean operator work on string in python [duplicate]
True and "asdf" or "qwer"
result => "asdf"
False and "asdf" or "qwer"
result => "qwer"
I can't understand how those things work. I thought that boolean operator on string would make type error, but ...
- 1,227
5
votes
4
answers
2k
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Logical operators in Python [duplicate]
While reading about logical operators in python, I came across the following expressions:
5 and 1
output: 1
5 or 1
output: 5
Can anyone explain how this is working?
I know that the operands of the ...
- 1,051
6
votes
2
answers
12k
views
Use of OR operator in python lambda function [duplicate]
There is a code example in the O Reilly Programming Python book which uses an OR operator in a lambda function. The text states that "[the code] uses an or operator to force two expressions to be run"....
- 611
2
votes
4
answers
1k
views
"4 and 5" is 5, while "4 or 5" is 4. Is there any reason? [duplicate]
When I test the difference between and and or, I meet this problem. Could you please help me understand it?
- 21
3
votes
5
answers
370
views
Concise way to compare a variable against multiple values [duplicate]
I've been trying to understand if it is possible to use an if statement similar to the likes of what I have demonstrated here below. It is my understand that it is not?
for i in range(10):
if i == (...
- 33
0
votes
2
answers
3k
views
Why does not(True or False) return False? [duplicate]
Just starting out learning Python. Is the reason for not(True or False) returning False because:
"True or False" is not a Falsy. Hence, not Falsy = Truthy. Therefore, not(Truthy) = False; ...
- 17
1
vote
1
answer
1k
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Complex compound boolean expression [duplicate]
I know how to test multiple boolean conditions (as below), but am wondering if I can combine testing multiple boolean conditions by grouping variables together, as below? Is there a way to shorten the ...
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