Summary of common Python string operation functions [split (), join (), strip ()], pythonstrip

Summary of common Python string operation functions [split (), join (), strip ()], pythonstrip

This example describes common Python string operation functions. We will share this with you for your reference. The details are as follows:

Str. split ('')

1. Split by a certain character, such '.'

>>> s = ('www.google.com')>>> print(s)www.google.com>>> s.split('.')['www', 'google', 'com']

2. Split by a character and divide it n times. For example, split one time by '.'. The number of times the maxsplit bit is cut.

>>> s = 'www.google.com'>>> s'www.google.com'>>> s.split('.', maxsplit=1)['www', 'google.com']

3. Split by a string. For example, '|'

>>> s = 'WinXP||Win7||Win8||Win8.1'>>> s'WinXP||Win7||Win8||Win8.1'>>> s.split('||')['WinXP', 'Win7', 'Win8', 'Win8.1']>>>

''. Join (str)

Python hasjoin()Andos.path.join()The functions are as follows:

Join (): concatenate a string array. Concatenates string, tuples, and list elements with specified characters (delimiters) to generate a new string.
OS. path. join (): returns the result after combining multiple paths.

Operate the sequence (use ''and ':' as separators respectively)

>>> seq1 = ['hello','good','boy','doiido']>>> print ' '.join(seq1)hello good boy doiido>>> print ':'.join(seq1)hello:good:boy:doiido

Operate on strings

>>> seq2 = "hello good boy doiido">>> print ':'.join(seq2)h:e:l:l:o: :g:o:o:d: :b:o:y: :d:o:i:i:d:o

Operate on tuples

>>> seq3 = ('hello','good','boy','doiido')>>> print ':'.join(seq3)hello:good:boy:doiido

Operate dictionaries

>>> seq4 = {'hello':1,'good':2,'boy':3,'doiido':4}>>> print ':'.join(seq4)boy:good:doiido:hello

Merge Directories

>>> import os>>> os.path.join('/hello/','good/boy/','doiido')'/hello/good/boy/doiido'

Str. strip ()

Declaration: "s" is a string and "rm" is the sequence of characters to be deleted.

S. strip (rm) deletes the characters starting and ending in the s string and located in the rm deletion sequence;
S. lstrip (rm) Delete the characters starting from the s string and located in the rm Delete sequence;
S. rstrip (rm) deletes the characters at the end of the s string in the rm deletion sequence;

1. When rm is blank, blank spaces (including '\ n',' \ R', '\ t', '') are deleted by default ','')

For example:

>>> A = '123abc' >>> a. strip ('21') '3abc' returns the same result >>> a. strip ('12') '3abc'

2. Here, the rm Delete sequence is deleted as long as the characters on the edge (beginning or end) are in the delete sequence.

For example:

>>> A = '123abc' >>> a. strip ('21') '3abc' returns the same result >>> a. strip ('12') '3abc'