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+--- Thread: multiple condition if statement problem (/thread-31931.html)
multiple condition if statement problem - FelixReiter - Jan-10-2021
Hey everyone, i'm trying filter items out of a list, which contains specific characters.
i tried to do it like shown below, but it is not doing what i expect it to do. instread of returning the list items, which contain "a" and "c", it gives me any item which has eighter an "a" or a "c" in it.
what am i doing wrong here? or is there a better way to do it? Happy for any help!
list = ["bc", "ad", "ac", "cpd"]
new_list =[]
for x in list:
if ("a" and "c") in x:
new_list.append(x)
print (new_list)Output:['bc', 'ac', 'cpd']RE: multiple condition if statement problem - jefsummers - Jan-10-2021
First, bad idea to have a variable named the same as a keyword (list).
This works. Note the change in the if statement
test_list = ["bc", "ad", "ac", "cpd"]
new_list =[]
for x in test_list:
if "a" in x and "c" in x:
new_list.append(x)
print (new_list)
RE: multiple condition if statement problem - ndc85430 - Jan-10-2021
Remember that the expression
"a" and "c" is a Boolean expression that actually evaluates to "c" (per the documentation), so your filter only keeps the items containing "c".Note also that a filter can be neatly expressed as a list comprehension:
values = ["bc", "ad", "ac", "cpd"] filtered_values = [v for v in values if "a" in v and "c" in v]
RE: multiple condition if statement problem - FelixReiter - Jan-11-2021
Thanks to both of you, for your help!