你怎么检查python字符串是否只包含数字？

How do you check whether a string contains only numbers?

如何检查字符串是否只包含数字？

I've given it a go here. I'd like to see the simplest way to accomplish this.

我已经在这里试了一下。我想看看实现这一目标的最简单方法。

import string

def main():
    isbn = input("Enter your 10 digit ISBN number: ")
    if len(isbn) == 10 and string.digits == True:
        print ("Works")
    else:
        print("Error, 10 digit number was not inputted and/or letters were inputted.")
        main()

if __name__ == "__main__":
    main()
    input("Press enter to exit: ")

6 个解决方案

#1

145

You'll want to use the isdigit method on your str object:

您将要在str对象上使用isdigit方法：

if len(isbn) == 10 and isbn.isdigit():

From the isdigit documentation:

从isdigit文档：

str.isdigit()
Return true if all characters in the string are digits and there is at least one character, false otherwise.

如果字符串中的所有字符都是数字且至少有一个字符，则返回true，否则返回false。

For 8-bit strings, this method is locale-dependent.

对于8位字符串，此方法取决于区域设置。

6 个解决方案

#1

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