?
- ???????Python : 3.7.3
- ?????????OS : Ubuntu 18.04.2 LTS
- ????????IDE : pycharm-community-2019.1.3
- ??????Conda : 4.7.5
- ???typesetting : Markdown
?
code
[email protected]:~$ source activate py37
(py37) [email protected]:~$ 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]: # 变量a引用了数字1，a指向1的地址
In [2]: a = 1
In [3]: id(a)
Out[3]: 94869542450208
In [4]: b = a # 变量b 赋值为 变量a
In [5]: id(b)
Out[5]: 94869542450208
In [6]: # 修改数据的引用。变量a引用了数字2，a指向2的地址
In [7]: a = 2
In [8]: id(a)
Out[8]: 94869542450240
In [9]: id(b)
Out[9]: 94869542450208
In [10]: # 变量名相当于一个标签
In [11]: exit
(py37) [email protected]:~$ conda deactivate
[email protected]:~$
?
source_code
def id(*args, **kwargs): # real signature unknown
"""
Return the identity of an object.
This is guaranteed to be unique among simultaneously existing objects.
(CPython uses the object's memory address.)
"""
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
?
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。
原文地址：https://www.cnblogs.com/xingchuxin/p/11135300.html
时间： 2024-07-30 18:37:15