In Python you can use the in operator to determine whether one string is contained in another string.
general format of an expression using
the in operator with two strings:
string1 in
string2
The expression returns true if string1
is found in string2.
Example:
text = 'Four hundred and seven years
ago'
if 'seven' in text:
print('The string
"seven" was found.')
else:
print('The string
"seven" was not found.')
‘not in’ operator can be used to determine
whether one string is not contained in another string.
Example:
text = 'Four hundred and seven years
ago'
if 'seven' not in text:
print('The string
"seven" was not found.')
else:
print('The string
"seven" was found.')