python基础

 1 #coding=utf-8
 2 #print函数
 3 print 3, -1, 3.14159, -2.8
 4 #type函数
 5 print type(3), type(3.14159), type("123")
 6 #类型转换
 7 print int(3.14159), int(-2.8)
 8 print float(3), float(-1)
 9 #输出字符串
10 print "span" + "and" + "eggs"
11 str1 = "teacher"
12 str2 = "student"
13 print "I‘m a %s, not a %s"%(str1, str2)
14 s = "123"
15 print type(s) == str
16 #次方
17 print 3 ** 3
18 print 81 ** 0.5