Programming of Python Learning

1. Build Python environment

Interactive mode: Input Python enters interactive mode, exit () exits interactive mode

Text mode: Create a new *.py file, edit the *.py file, run Python *.py

2. python file type

(1) Source code: Python Source code file with "py" as the extension, interpreted by the Python program, do not need to compile.

For 1.py file standard notation:

#!/usr/bin/python

print ' Hello World '

Run: Mode one: Python 1.py

Way two:./1.py #前提是1. py file has executable permissions

(2) Byte code: The python source file is compiled with the file extension "PYc" and is binary code.

The contents of 2.py are: import py_compile

Py_compile.compile ("1.py")

Running a 2.py file generates a 1.PYC file and 1.pyc is a compiled binary file

3. Optimized code: Optimized source file with ". pyo" extension, binary code

Optimization mode: Python-o-M Py_compile 1.py

Programming of Python Learning