python all elements not in list
[x for x in item if x not in z]python all elements not in list
[x for x in item if x not in z]pandas not in list
>>> df
countries
0 US
1 UK
2 Germany
3 China
>>> countries
['UK', 'China']
>>> df.countries.isin(countries)
0 False
1 True
2 False
3 True
Name: countries, dtype: bool
>>> df[df.countries.isin(countries)]
countries
1 UK
3 China
>>> df[~df.countries.isin(countries)]
countries
0 US
2 Germanypython check if list contains
# To check if a certain element is contained in a list use 'in'
bikes = ['trek', 'redline', 'giant']
'trek' in bikes
# Output:
# Truepython check if list contains value
if value in list:
#do stuff
#Also to check if it doesn't contain
if value not in list:
#do stuffpython checking not in list
a = [1, 2, 3, 4, 5, 6]
b = 7
c = 4
# use "not in" to check if something is not an element of a list
# use "in" to check if something is an element of a list
if b not in a:
print('True')
else:
print('False')
if c in a:
print('True')
else:
print('False')Copyright © 2021 Codeinu
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