Basic Python Learning 1

1. Write Python code principles:

• Uniform indentation, the same level indentation must be consistent, different levels must be more indented;

• Shelf start writing, can not have spaces;

• Variable

It is recommended that you write on the Windows-side installation Pychram program.

2. Variable Name requirements:

• The first character of the identifier must be the letter in the alphabet (either uppercase or lowercase) or an underscore _

• Other parts of the identifier name can consist of a letter (uppercase or lowercase), an underscore _, or a 0-9 number

• Identifier names are case-sensitive

• You cannot use commands in Python

3. How to define Python environment variables and encodings

• The first line of the program declares, such as: #!/usr/bin/env python

• declaration Code format U tf-8: #-*-Coding:utf-8-*-#这样可以免除中文乱码
  

  Such as:
  #!/usr/bin/env Pyhon
  #-*-Coding:utf-8-*-

4, how to comment:

• Single-line comments start with a # number, like a shell, such as print ' Print Python test '

• Multi-line comments

Such as:

info = "Print test1

Test2

Test3 ""

Print Info

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Basic Python Learning 1