Python 验证字符串输入

输入整数时，此代码有效。但是，当我键入字符串时，它也会将其识别为无效。如何解决此问题？

始终满足while条件-int是类类型的对象，而name是字符串。这两者永远不会相等

您可以使用正则表达式来验证输入。例如，如果名称不能包含数字字符：

name=input("What is your name?:  ")

while name != int:
    print("Input is Invalid.  Please enter a name.")
    name = input("Enter name:  ")

---

始终满足while条件-int是类类型的对象，而name是字符串。这两者永远不会相等

您可以使用正则表达式来验证输入。例如，如果名称不能包含数字字符：

name=input("What is your name?:  ")

while name != int:
    print("Input is Invalid.  Please enter a name.")
    name = input("Enter name:  ")

---

始终满足while条件-int是类类型的对象，而name是字符串。这两者永远不会相等

您可以使用正则表达式来验证输入。例如，如果名称不能包含数字字符：

name=input("What is your name?:  ")

while name != int:
    print("Input is Invalid.  Please enter a name.")
    name = input("Enter name:  ")

---

始终满足while条件-int是类类型的对象，而name是字符串。这两者永远不会相等

您可以使用正则表达式来验证输入。例如，如果名称不能包含数字字符：

name=input("What is your name?:  ")

while name != int:
    print("Input is Invalid.  Please enter a name.")
    name = input("Enter name:  ")

想想这个

import re
name = input("What is your name?:  ")

while re.search('\d', name):
  print("Input is Invalid.  Please enter a name.")
  name = input("Enter name:  ")

只需将while表达式更改为

，而不是任何（i in a for i in name）

一切都会好起来的。然后，您可以根据需要扩展

a

（不需要的字符），并获得更准确的结果。

考虑一下这一点

import re
name = input("What is your name?:  ")

while re.search('\d', name):
  print("Input is Invalid.  Please enter a name.")
  name = input("Enter name:  ")

只需将while表达式更改为

，而不是任何（i in a for i in name）

一切都会好起来的。然后，您可以根据需要扩展

a

（不需要的字符），并获得更准确的结果。

考虑一下这一点

import re
name = input("What is your name?:  ")

while re.search('\d', name):
  print("Input is Invalid.  Please enter a name.")
  name = input("Enter name:  ")

只需将while表达式更改为

，而不是任何（i in a for i in name）

一切都会好起来的。然后，您可以根据需要扩展

a

（不需要的字符），并获得更准确的结果。

考虑一下这一点

import re
name = input("What is your name?:  ")

while re.search('\d', name):
  print("Input is Invalid.  Please enter a name.")
  name = input("Enter name:  ")

只需将while表达式更改为

，而不是任何（i in a for i in name）

一切都会好起来的。然后，您可以根据需要扩展

a

（不需要的字符），并获得更准确的结果。

这是怎么回事

>>> a = [str(i) for i in range(10)]
>>> a
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
>>> name = input("what is your name? ")
what is your name? 3rwin
>>> any(i in a for i in name)
True
>>> name = input("what is your name? ")
what is your name? ernesto
>>> any(i in a for i in name)
False
>>> not any(i in a for i in name)
True

这个怎么样

>>> a = [str(i) for i in range(10)]
>>> a
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
>>> name = input("what is your name? ")
what is your name? 3rwin
>>> any(i in a for i in name)
True
>>> name = input("what is your name? ")
what is your name? ernesto
>>> any(i in a for i in name)
False
>>> not any(i in a for i in name)
True

这个怎么样

>>> a = [str(i) for i in range(10)]
>>> a
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
>>> name = input("what is your name? ")
what is your name? 3rwin
>>> any(i in a for i in name)
True
>>> name = input("what is your name? ")
what is your name? ernesto
>>> any(i in a for i in name)
False
>>> not any(i in a for i in name)
True

这个怎么样

>>> a = [str(i) for i in range(10)]
>>> a
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
>>> name = input("what is your name? ")
what is your name? 3rwin
>>> any(i in a for i in name)
True
>>> name = input("what is your name? ")
what is your name? ernesto
>>> any(i in a for i in name)
False
>>> not any(i in a for i in name)
True