Python Common string processing

S.find (Substring,[start[end]]) #可指范围查找子串, returns the index value, otherwise returns-1

For example

>>>b = ' ABCD '
>>> b.find (' d ')
3
>>> b.find (' d ', 2,4)
3
>>> b.find (' d ', 3,4)
3

>>> b.find (' d ', 2, 3)
-1

Visible when the specified range is searched, the specified range is opened before closing.

S.index (Substring,[start[end]) #同find, just can't find the valueerror exception

S.count (Substring,[start[end]) #返回找到子串的个数

S.split (' * ') #将string转list, divided by *, for example:

>>> B = ' abc def GHI '
>>> B.split (")
[' abc ', ' Def ', ' Ghi ']

' * '. Join () #将list转string, with * link

For example:

>>> B = ' abc def GHI '
>>> B.split (")
[' abc ', ' Def ', ' Ghi ']
>>> C = B.split (")
>>> ' * '. Join (c)
' Abc*def*ghi '

Other uses are easier to understand, not to repeat

Python Common string processing