Python3 basis str: reverse a string

 

•        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 = "0123456789"                                                  

In [2]: content[-1::-1]                                                         
Out[2]: '9876543210'

In [3]: # 末尾的字符索引为-1                                                    

In [4]: content[::-1]                                                           
Out[4]: '9876543210'

In [5]: exit                                                                    
(py37) coder@ubuntu:~$ conda deactivate
coder@ubuntu:~$ 

 

resource

• [Documents - English] docs.python.org/3
• [Documentation - Chinese] docs.python.org/zh-cn/3
• [Specification] www.python.org/dev/peps/pep-0008
• [Specification] zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules
• [Source] www.python.org/downloads/source
• [ PEP ] www.python.org/dev/peps
• [Platform] www.cnblogs.com
• [Platform] gitee.com

 

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Python has an open source, cross-platform, interpreted, interactive and other characteristics, it is worth learning.
Python's design philosophy: elegant, clear and simple. Promote the use of a method, the best is only one way to do a thing.
Writing code to comply with norms, which helps communication and understanding.
Each language has unique ideas, beginners need to change the thinking, pragmatic practice, adhere to accumulate.