s = 'cescesc'
print (s.isupper) # judge is not all uppercase letters
print (s.isdigit) # determines whether bit number
print (s.islower) # judgment is not lowercase
number = input ( 'Enter to produce a few:')
print (s.index ( 'd')) # can not find the error
print (s.find ( 'd')) can not be found reported -1
s.count ( 'a') statistical number appears
s.strip () clear space
s.lstrip () to remove the spaces left
s.rlstrp () the right to remove spaces
s.startswith () # determine what the beginning
s.endswith () to determine what end