Python3基础 str split 用指定的字符将字符串分割

Posted 2021-01-08 xingchuxin

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•                    python : 3.7.0
•                           OS : Ubuntu 18.04.1 LTS
  
•                          IDE : PyCharm 2018.2.4
•                      conda : 4.5.11
•            type setting : Markdown

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code

[email protected]:~$ source activate py37
(py37) [email protected]:~$ ipython
Python 3.7.0 (default, Jun 28 2018, 13:15:42) 
Type ‘copyright‘, ‘credits‘ or ‘license‘ for more information
IPython 6.5.0 -- An enhanced Interactive Python. Type ‘?‘ for help.

In [1]: content = "hello,world"

In [2]: hello_str = content.split(",")

In [3]: hello_str
Out[3]: [‘hello‘, ‘world‘]

In [4]: hello_str,world_str = content.split(‘,‘, 1)

In [5]: hello_str
Out[5]: ‘hello‘

In [6]: world_str
Out[6]: ‘world‘

In [7]: exit
(py37) [email protected]:~$ source deactivate py37
[email protected]:~$ 

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more knowledge

split(self, /, sep=None, maxsplit=-1)
    Return a list of the words in the string, using sep as the delimiter string.
    
    sep
      The delimiter according which to split the string.
      None (the default value) means split according to any whitespace,
      and discard empty strings from the result.
    maxsplit
      Maximum number of splits to do.
      -1 (the default value) means no limit.

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[email protected]:~$ source activate py37
(py37) [email protected]:~$ ipython
Python 3.7.0 (default, Jun 28 2018, 13:15:42) 
Type ‘copyright‘, ‘credits‘ or ‘license‘ for more information
IPython 6.5.0 -- An enhanced Interactive Python. Type ‘?‘ for help.

In [1]: my_str = "hello,world,hello,world"

In [2]: my_str.split(‘,‘, 1)
Out[2]: [‘hello‘, ‘world,hello,world‘]

In [3]: my_str.split(‘,‘, 2)
Out[3]: [‘hello‘, ‘world‘, ‘hello,world‘]

In [4]: my_str.split(‘,‘, 3)
Out[4]: [‘hello‘, ‘world‘, ‘hello‘, ‘world‘]

In [5]: my_str.split(‘,‘, 4)
Out[5]: [‘hello‘, ‘world‘, ‘hello‘, ‘world‘]

In [6]: exit
(py37) [email protected]:~$ source deactivate py37
[email protected]:~$ 

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resource

• [文档] https://docs.python.org/3/
• [规范] https://www.python.org/dev/peps/pep-0008/
• [规范] https://zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules/
• [源码] https://www.python.org/downloads/source/
• [ PEP ] https://www.python.org/dev/peps/
• [平台] https://www.cnblogs.com/

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