Question

How to check if element exists in a list of lists with Python

Answer 1

lst_lst = [[1, 2, 3, 4], 
           [5, 6, 7, 8], 
           [9, 10, 11, 12]] 


element = 9
b = any(element in lst for lst in lst_lst) 
print(b)

element = 35
b = any(element in lst for lst in lst_lst) 
print(b) 



'''
run:

True
False

'''

 

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Answer 2

from  itertools import chain 

lst_lst = [[1, 2, 3, 4], 
           [5, 6, 7, 8], 
           [9, 10, 11, 12]] 


element = 9
b = element in chain(*lst_lst) 
print(b)

element = 35
b = element in chain(*lst_lst) 
print(b) 



'''
run:

True
False

'''

 

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