python获取从命令行输入数字的方法

本文实例讲述了python获取从命令行输入数字的方法。分享给大家供大家参考。具体如下：

    #----------------------------------------
    #      Name: numerical_input.py
    #     Author: Kevin Harris
    # Last Modified: 02/13/04
    #  Description: This Python script demonstrates 
    #         how to get numerical input
    #         from the command line 
    #         and use the if-else conditional.
    #----------------------------------------
    print()
    print( "Welcome to the Area calculation program" )
    print( "---------------------------------------" )
    print()
    # Print out the menu:
    print( "Please select a shape:" )
    print( "1 Rectangle" )
    print( "2 Circle" )
    print()
    # The input function both prompts the user
    # for input and fetches it...
    shape = int( input( "> " ) )
    # Calculate the area...
    if shape == 1:
      height = int( input("Please enter the height: ") )
      width = int( input("Please enter the width: ") )
      area = height*width
      print( "The area is", area )
    else:
      radius = int( input("Please enter the radius: ") )
      area = 3.14*(radius**2)
      print( "The area is", area )
    input( '\n\nPress Enter to exit...' )

希望本文所述对大家的Python程序设计有所帮助。