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:~$ source 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]: a = (1, 2, [4, 5]) # index=2的元素是list类型

In [2]: type(a), id(a)

Out[2]: (tuple, 140524432415480)

In [3]: a[2].append(6) # 改变index=2的list类型的元素的值

In [4]: a

Out[4]: (1, 2, [4, 5, 6])

In [5]: type(a), id(a) # id(a)的值竟然无变化

Out[5]: (tuple, 140524432415480)

In [6]: exit

(py37) coder@ubuntu:~$ conda deactivate

coder@ubuntu:~$

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

reference

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。