Python Learning notes (10)

String method

find join lower replace split strip translate

Find

You can find the string in a longer string, the return value is the leftmost index of the location where the string is located, and cannot find the return-1

Cases:

>>> ' with a Moo-moo here,and a moo-moo there '. Find (' moo ')

7

>>> ' with a Moo-moo here,and a moo-moo there '. Find (' Hello ')

-1

Join

The element in the connecting sequence is the inverse method of Split

Cases:

>>>sss = [' 1 ', ' 2 ', ' 3 '] #注意: This must be quoted, because it can only concatenate strings

>>>CCC = ' + '

>>>ccc.join (SSS)

' 1+2+3 '

>>>dirs = ', ' usr ', ' bin ', ' env '

>>> '/'. Join (dirs)

'/usr/bin/env '

>>> print ' C: ' + ' \ \ '. Join (dirs)

C:\usr\bin\env

Lower

Returns the lowercase letter version of the character

Cases:

>>> ' Where is You '. Lower ()

' Where is You '

Replace

The resulting string after all occurrences of a string have been replaced

Cases:

>>> ' This was a test '. Replace (' is ', ' EEZ ')

' Theez eez a test '

Split

Splitting a string into a sequence , the inverse method of the Join method

Cases:

>>> ' 1+2+3+4 '. Split (' + ') #此处若不指定任何分割符 with a space separator (space, tab, line wrap, etc.)

[' 1 ', ' 2 ', ' 3 ', ' 4 ']

Strip

Returns a string that strips both sides of the space (excluding interior)

Cases:

>>> ' where is You '. Strip ()

' Where is You '

>>> ' ***where * is * you *********! '. Strip (*!)

' WHERE * is * you '

Translate

Replace Some parts of a string, handling only a single character

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Python Learning notes (10)