Python3基础 str ljust-rjust-center 左、右对齐 居中

 

•        Python : 3.7.3
•          OS : Ubuntu 18.04.2 LTS
•         IDE : pycharm-community-2019.1.3
•       Conda : 4.7.5
•    typesetting : Markdown

 

code

coder@ubuntu:~$ conda activate py37
(py37) coder@ubuntu:~$ ipython
Python 3.7.3 (default, Mar 27 2019, 22:11:17)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.5.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: content = "123"                                                         

In [2]: # 原字符串左对齐，并用 - 填充直到字符串长度为6                          

In [3]: content.ljust(6, '-')
Out[3]: '123---'

In [4]: # 原字符串右对齐，并用 - 填充直到字符串长度为6                          

In [5]: content.rjust(6, '-')
Out[5]: '---123'

In [6]: # 原字符串居中，并用 - 填充直到字符串长度为6                            

In [7]: content.center(6, '-')
Out[7]: '-123--'

In [8]: # 原字符串居中，并用 - 填充直到字符串长度为7                            

In [9]: content.center(7, '-')
Out[9]: '--123--'

In [10]: exit
(py37) coder@ubuntu:~$ conda deactivate
coder@ubuntu:~$ 

 

source_code

def ljust(self, *args, **kwargs): # real signature unknown
    """
    Return a left-justified string of length width.

    Padding is done using the specified fill character (default is a space).
    """
    pass

def rjust(self, *args, **kwargs): # real signature unknown
    """
    Return a right-justified string of length width.

    Padding is done using the specified fill character (default is a space).
    """
    pass

def center(self, *args, **kwargs): # real signature unknown
    """
    Return a centered string of length width.

    Padding is done using the specified fill character (default is a space).
    """
    pass

 

resource

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

 

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Python具有开源、跨平台、解释型、交互式等特性，值得学习。

Python的设计哲学：优雅，明确，简单。提倡用一种方法，最好是只有一种方法来做一件事。

代码的书写要遵守规范，这样有助于沟通和理解。

每种语言都有独特的思想，初学者需要转变思维、踏实践行、坚持积累。