import re
 
 
sashalist1 = ['Sasha1', 'Sasha14', 'Sasha4147' ]
sashalist2 = ['Sasha1', 'Sasha14', 'Sasha4147', 'asha4147' ]
sasharegex = r'Sas'
 
if all(re.search(sasharegex, item) for item in sashalist1):
    print('in sashalist1 All elements have sasharegex !')
else:
    print('in sashalist1 NOT all elements have sasharegex !')
 
if all(re.search(sasharegex, item) for item in sashalist2):
    print('in sashalist2 All elements have sasharegex !')
else:
    print('in sashalist2 NOT all elements have sasharegex !')
 

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