Python Basic Learning (1th day)

Write this essay, is to see Vamei big capital of the Python Quick Tutorial study notes, with this encourage each other, link: http://www.cnblogs.com/vamei/archive/2012/09/13/2682778.html

"First Lesson"

1, use Python to write a HelloWorld small program, directly in the hello.py input

print ' Hello World '

2. Hello.py can also be written as an executable script, as follows:

# !/usr/bin/env python Print ' Hello World '

You also need to give executable permissions to the above code, as follows:

#chmod 755 hello.py

Command line execution:

#./hello.py

Lesson two basic data types

1. Variables do not need to be defined

A=10print aprint Type (a) output: 10<type ' int ' >

Type (): Built-in function that queries the type of the variable.

2. Recycle variable name

If you want a to store a different value, you do not have to delete A to assign a value directly to it.

A=1.5print A,type (a) output 1.5,<type, ' float ' >

Print can be followed by multiple outputs, separated by commas.

3. Basic Data Type

Integer, Float, Boolean (True/false), String (single and double quotes are available)

Python Basic Learning (1th day)