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一个实操

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慢热程某某

#1 Created at ... [Delete] [Delete and Lock User] 
class Com(object):

    def __init__(self,num1,num2):
        self.n1=num1
        self.n2=num2

    def compa(co):
        if co.n1>co.n2:
            return str(co.n1)+'大于'+str(co.n2)
        elif co.n1==co.n2:
            return str(co.n1)+'等于'+str(co.n2)
        else:
            return str(co.n1)+'小于'+str(co.n2)

def collect():
    M = []
    M0 = float(input('输入一个数字：'))
    M.append(M0)
    M1 = float(input('再输入一个数字：'))
    M.append(M1)
    return M

M = collect()
x=Com(M[0],M[1])
print('第一个数字:''%s' % (x.n1)+'\n''第二个数字：''%s' % (x.n2))
print(x.compa())

为什么collect函数 不能放在Com类下面呢？

早起的达先生

#2 Created at ... [Delete] [Delete and Lock User] 
#!/usr/bin/env python3
# -*- coding: utf-8 -*-

class Com(object):

    def __init__(self):
        self.n1=float(input('输入一个数字：'))
        self.n2=float(input('再输入一个数字：'))

    def compa(self):
        if self.n1>self.n2:
            return str(self.n1)+'大于'+str(self.n2)
        elif self.n1==self.n2:
            return str(self.n1)+'等于'+str(self.n2)
        else:
            return str(self.n1)+'小于'+str(self.n2)


x=Com()
print('第一个数字:''%s' % (x.n1)+'\n''第二个数字：''%s' % (x.n2))
print(x.compa())

Al0an

#3 Created at ... [Delete] [Delete and Lock User] 
# ! /usr/bin/env python
# -*- coding:utf-8 -*-

class Com:
    def __init__(self,num1,num2):
        self.num1=num1
        self.num2=num2

    def compa(self):
        if self.num1 > self.num2:
            return str(self.num1)+'>'+str(self.num2)
        elif self.num1 == self.num2:
            return str(self.num1)+'='+str(self.num2)
        else:
            return str(self.num1)+'<'+str(self.num2)

M0=input('input a num:')
M1=input('input a num again:')

print('first num:%s' % M0+'\n'+'two num:%s' % M1)
x=Com(M0,M1)
print(x.compa())

机修贾森

#4 Created at ... [Delete] [Delete and Lock User]

Com类定义部分不变，外部方法：

def collect():
    M = []
    M0 = input('first one: ')
    M1 = input('second one: ')
    M.append(M0)
    M.append(M1)
    return M
def compare():
      M = collect()
      x = Com(M[0],M[1])
      x.compa()

if __name__ == '__main__':
      compare()

按照你之前的写法，collect（）就是用来获得用户输入的，如果想写到Com类定义中去，可以参考1楼~

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