Python3基础 dict pop 弹出指定键的项

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]: my_dic = {‘子‘: ‘鼠‘, ‘丑‘: ‘牛‘, ‘寅‘: ‘虎‘, ‘卯‘: ‘兔‘,
   ...:           ‘辰‘: ‘龙‘, ‘巳‘: ‘蛇‘, ‘午‘: ‘马‘, ‘未‘: ‘羊‘,
   ...:           ‘申‘: ‘猴‘, ‘酉‘: ‘鸡‘, ‘戌‘: ‘狗‘, ‘亥‘: ‘猪‘}
   ...:           

In [2]: # 弹出 键为 ‘子‘的项

In [3]: my_dic.pop(‘子‘)
Out[3]: ‘鼠‘

In [4]: my_dic
Out[4]: 
{‘丑‘: ‘牛‘,
 ‘寅‘: ‘虎‘,
 ‘卯‘: ‘兔‘,
 ‘辰‘: ‘龙‘,
 ‘巳‘: ‘蛇‘,
 ‘午‘: ‘马‘,
 ‘未‘: ‘羊‘,
 ‘申‘: ‘猴‘,
 ‘酉‘: ‘鸡‘,
 ‘戌‘: ‘狗‘,
 ‘亥‘: ‘猪‘}

In [5]: # 弹出 一个不存在的键所对应的项会报错

In [6]: my_dic.pop(‘行初心‘)
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-6-816ff248824b> in <module>()
----> 1 my_dic.pop(‘行初心‘)

KeyError: ‘行初心‘

In [7]: 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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Python具有开源、跨平台、解释型、交互式等特性，值得学习。
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