Python练习代码 -- 变量定义和控制语句

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# -*- mode: python; coding: utf-8 -*-import py_compileimport randomimport sysfrom sys import api_versionage = 30name = "kevin \xiang"print("hello world", age, name)  if age <= 50 :    print("age <= 50")else :    print("age >50")      print(sys.argv)print(sys.path)print(api_version)  num3 = 100print("num3: ", id(num3)) def compareNum(num1, num2):    #global num3    if(num1 > num2):        num3 = 1;                return str(num1) + ">" + str(num2)    elif(num1 < num2):        num3 = -1;        return str(num1) + "<" + str(num2)    elif(num1 == num2):        num3 = 0;        return str(num1) + "==" + str(num2)    else:        return "" num1 = 2num2 = 2#num3 = 199print(compareNum(num1, num2))print("num3:", num3, id(num3), type(num3)); str1 = "'he say'"print(str1) num3 = 2 ** 5print(num3) num4 = 1num5 = 0print( num4 and num5, num4 or num5, not num4 )  x = raw_input("x:")x = float(x)print("x type: ", type(x), x)    while(num5 < 5):    num5 += 1;    print("num5 %d %d" %(num5, num5))for i in range(1, 5, 1):        if(i==3):        continue    print(i)num6,num7 = 6,7print(num6, num7)

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