count
returns the number of times its argument occurs in a stringsentence = 'to be or not to be that is the question'
sentence.count('to')
count
searches only the slice string[
start_index:]
sentence.count('to', 12)
count
searches only the slice string[
start_index:
end_index]
sentence.count('that', 12, 25)
count
, the other string methods presented in this section each have start index and end index arguments index
searches for a substring within a string and returns the first index at which the substring is found; otherwise, a ValueError
occurs:sentence.index('be')
rindex
performs the same operation as index
, but searches from the end of the stringsentence.rindex('be')
find
and rfind
perform the same tasks as index
and rindex
but return -1
if the substring is not foundin
or not in
'that' in sentence
'THAT' in sentence
'THAT' not in sentence
startswith
and endswith
return True
if the string starts with or ends with a specified substringsentence.startswith('to')
sentence.startswith('be')
sentence.endswith('question')
sentence.endswith('quest')
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