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Python Road-1:Python History and Introduction

Python History

Python is an interpretedhigh-levelgeneral-purpose programming language. Created by Guido van Rossum and first released in 1991, Python’s design philosophy emphasizes code readability with its notable use of significant whitespace. it is a dynamically typed and garbage-collected language…

Use Python for …

Web Deployment: Django, Pyramid, Bottle, Tornado, Flask, web2py
GUI Deployment: tklnter, PyGObject, PyQt, PySide, Kivy, wxPython
Scientific and Numeric: SciPy, Pandas, IPython
Software Development: Buildbot, Trac, Roundup
System Administration: Ansible, Salt, OpenStack

And a lot of famous technology giants are using Python, such as Youtube, Dropbox, BT, Quor, Google, Yahoo!, Facebook, NASA.

Python Environment

Install Python


1. Download Installation package
2. Install
    Default install path (but you can install another location) C:\Users\username\AppData\Local\Programs\Python\Python38
3、Setting Environment Variables
    【Computer】-->【Properties】-->【Advanced System Settings】-->【Advanced】-->【Environment Variables】-->【Find Path】 --> 【Append Python install path and end with ;】

Linux & Mac:

Python is built-in Program in Linux and Mac.

Python 101

1. First coding in Python

Open Python IDE and input bellow code
Print("hello world")

2. Variables

#!/usr/bin/env python
# -*- coding: utf-8 -*-
name = "Anson"

it defines a variable, variable name is name, value is Anson.


The first character in a variable name cannot be number.

Following keywords cannot be declear as variable name:
[‘and’, ‘as’, ‘assert’, ‘break’, ‘class’, ‘continue’, ‘def’, ‘del’, ‘elif’, ‘else’, ‘except’, ‘exec’, ‘finally’, ‘for’, ‘from’, ‘global’, ‘if’, ‘import’, ‘in’, ‘is’, ‘lambda’, ‘not’, ‘or’, ‘pass’, ‘print’, ‘raise’, ‘return’, ‘try’, ‘while’, ‘with’, ‘yield’]

3. Input

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# assign a input value to name
name = raw_input("Please Input name:")
# print name
print name

When input the password, Function ‘getpass’ can make the password invisible.

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import getpass
# assign a input value to password
password = getpass.getpass("Please input password:")
# print password

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