1. join(self, ab=None, pq=None, rs=None): # real signature unknown; restored from __doc__
"""
Concatenate any number of strings.
The string whose method is called is inserted in between each given string.
The result is returned as a new string.
Example: '.'.join(['ab', 'pq', 'rs']) -> 'ab.pq.rs'
a = "你不是美女！" print(a) b = "***" c = b.join(a) print(c) ——————- 你不是美女！ 你***不***是***美***女***！
2. split(self, *args, **kwargs): # real signature unknown
a = 'jfwiefuieowir'
b = a.split('i',2)
print(b)
__________
['jfw', 'efu', 'eowir']
a = 'jfwiefuieowir'
b = a.split('i')
print(b)
______________
['jfw', 'efu', 'eow', 'r']
3. find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
S.find(sub[, start[, end]]) -> int
Return the lowest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
"""
return 0
a = 'jfwiefuieowir'
b = a.find('u',2,10)
print(b)
_________
6
4. strip(self, *args, **kwargs): # real signature unknown
"""
Return a copy of the string with leading and trailing whitespace remove.
If chars is given and not None, remove characters in chars instead.
"""
pass
a = ' jfwiefuieowir '
b = a.strip() #删除前面和后面的空格
c = a.lstrip() #删除左面的空格
d = a.rstrip() #删除右面的空格
print(a,'\n',b,'\n',c,'\n',d)
________________________
jfwiefuieowir
jfwiefuieowir
jfwiefuieowir
jfwiefuieowir
5. lower(self, *args, **kwargs): # real signature unknown
""" Return a copy of the string converted to lowercase. """
pass
upper(self, *args, **kwargs): # real signature unknown
""" Return a copy of the string converted to uppercase. """
pass
a = 'TjkdFGklfsaYYY' b = a.lower() c = a.upper() print(a,'\n',b,'\n',c,'\n') ___________________ TjkdFGklfsaYYY tjkdfgklfsayyy TJKDFGKLFSAYYY
