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python - 如何在带有 if 的辅助函数中使用 isdigit() 方法

问题描述

cani 如何使用 isdigit 方法 像那样if self.month.isdigit():

需要知道我的输入是否是数字

class myclass():
def __init__(self,year,month,day):
    self.mah = ['none','farvardin','ordibehesht','khordad','tir','mordad','shahrivar','mehr','aban','azar','dey','bahman','esfand']
    self.daylist = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31]
    self.year = year
    self.month = month
    self.day = day
def myfunc(self):
    if self.month.isdigit(): # problem is (isdigit) not working



p1= input("Please enter date:")
year,month,day = p1.split('-')
p2 = myclass(year,month,day)
p2.myfunc()

标签： python

解决方案

@Tiago 据我了解，我已经更新了您的代码。当您从标准输入中获取输入时，p1 将只是一个字符串对象，但如果 p1 中没有任何“-”，那么代码将生成解包错误。例如，如果您通过20211114。

Please enter date: 
Traceback (most recent call last):
  File "jdoodle.py", line 19, in <module>
    year,month,day = p1.split('-')
ValueError: not enough values to unpack (expected 3, got 1)

  • 我已将您的班级名称从range更改为 CustomRange

  • 加上我使用列表理解的日程表变量。

     class CustomRange():
 def __init__(self,year,month,day):
     self.daylist = [i for i in range(1,32)]
     self.year = year
     self.month = month
     self.day = day
     self.mah = ['none','farvardin','ordibehesht','khordad','tir','mordad','shahrivar','mehr','aban','azar','dey','bahman','esfand']
 def myfunc(self):
     if self.month.isdigit(): # problem is (isdigit) not working
         print(self.month, "is number")
         return True
     else:
         print(self.month, "is not number")
         return False

 p1= input("Please enter date: ")
 year,month,day = p1.split('-')
 p2 = CustomRange(year,month,day)
 p2.myfunc()

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