Python common string manipulation functions Summary [split (), join (), strip ()]

Common examples herein describes Python string manipulation functions. Share to you for your reference, as follows:

str.split ( '')

1. Press the segmentation of a single character, such as '.'

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

2. Press one character split and divided n times. The division by 1 ''; cutting bit number parameter maxsplit

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

3. segmented by a string. Such as: '||'

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

’ '.join(str)

Python, the join () and the os.path.join () two functions, specifically effects include:

join (): connecting string array. A string, a tuple, in the list element to specify character (separator) connected to generate a new string
os.path.join (): returns the plurality of combinations of paths

The operation sequence (respectively using 'and': 'as a separator)

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

Manipulate 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

Operating a tuple

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

Operating a tuple

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

To operate dictionary

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

The combined catalog

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

str.strip()

Disclaimer: s a string, rm is a sequence of characters to be deleted

s.strip (rm) to delete the beginning of the string s, at the end, located rm delete character sequence;
s.lstrip (rm) to delete the beginning of the string s, rm located delete character sequence;
s.rstrip (rm) at the end of the string s delete, delete character sequence rm located;

1. When rm is empty, the default deletion whitespace (including '\ n', '\ r', '\ t', '')

E.g:

>>> a = '123abc'
>>> a.strip('21')
'3abc'  结果是一样的
>>> a.strip('12')
'3abc'

2. Here is the sequence rm delete characters on the long side (beginning or end) in the deletion sequence, it is deleted.

E.g:

>>> a = '123abc'
>>> a.strip('21')
'3abc'  结果是一样的
>>> a.strip('12')
'3abc'

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