python的模块代码调用

一、模块GCDFunction.py,用来求两个数的最大公约数

def  gcd(n1,n2):
     gcd=1
     k=2

     while k<=n1 and k<=n2:
            if n1%k==0 and n2%k==0:
                gcd=k
            k+=1

     return gcd


print "Finishing calculating greatest common divisor"

二、下面，运用模块GCDFunction.py，实现功能：输入两个整数，求它们的最大公约数

1.  方法1：从模块GCDFunction.py导入函数gcd

from GCDFunction import gcd # Import the module

# Prompt the user to enter two integers
n1 = eval(input("Enter the first integer: "))
n2 = eval(input("Enter the second integer: "))

print("The greatest common divisor for", n1,
    "and", n2, "is", gcd(n1, n2))

结果为：

Finishing calculating greatest common divisor
enter the first number: 45
enter the second number: 75
the divisor for 45 and 75 is 15

2.  方法2：直接导入模块GCDFunction.py

import GCDFunction
n1 = eval(raw_input("enter the first number: "))
n2 = eval(raw_input("enter the second number: "))
n1n2gcd = GCDFunction.gcd(n1,n2)
print "the divisor for %i and %i is %i" %(n1,n2,n1n2gcd)

结果为：

Finishing calculating greatest common divisor
enter the first number: 45
enter the second number: 75
the divisor for 45 and 75 is 15

三、下面，运用模块GCDFunction.py，实现功能：输入两个整数，求它们的最大公约数，循环做3次

1.  方法1：从模块GCDFunction.py导入函数gcd

from  GCDFunction  import gcd
for i in range(3):
    n1 = eval(raw_input("enter the first number: "))
    n2 = eval(raw_input("enter the second number: "))
    print "the divisor for %i and %i is %i" %(n1,n2,gcd(n1,n2))
    print

结果为：

Finishing calculating greatest common divisor
enter the first number: 15
enter the second number: 75
the divisor for 15 and 75 is 15

enter the first number: 16
enter the second number: 48
the divisor for 16 and 48 is 16

enter the first number: 17
enter the second number: 51
the divisor for 17 and 51 is 17

2.  方法2：直接导入 模块GCDFunction.py

import GCDFunction
for i in range(3):
    n1 = eval(raw_input("enter the first number: "))
    n2 = eval(raw_input("enter the second number: "))
    n1n2gcd = GCDFunction.gcd(n1,n2)
    print "the divisor for %i and %i is %i" %(n1,n2,n1n2gcd)
    print

结果为：

Finishing calculating greatest common divisor
enter the first number: 15
enter the second number: 75
the divisor for 15 and 75 is 15

enter the first number: 16
enter the second number: 48
the divisor for 16 and 48 is 16

enter the first number: 17
enter the second number: 51
the divisor for 17 and 51 is 17