NameError:未定义名称“现在" [英] NameError: name 'now' is not defined

问题描述

从此源代码开始:

def numVowels(string):
    string = string.lower()
    count = 0
    for i in range(len(string)):
        if string[i] == "a" or string[i] == "e" or string[i] == "i" or \
            string[i] == "o" or string[i] == "u":
            count += 1
    return count

print ("Enter a statement: ")
strng = input()
print ("The number of vowels is: " + str(numVowels(strng)) + ".")

运行时出现以下错误:

Enter a statement:
now

Traceback (most recent call last):
  File "C:\Users\stevengfowler\exercise.py", line 11, in <module>
    strng = input()
  File "<string>", line 1, in <module>
NameError: name 'now' is not defined

==================================================

推荐答案

使用> c0> 而不是 input() .

Use raw_input() instead of input().

在Python 2中，后者尝试 eval() 输入，这就是导致异常的原因.

In Python 2, the latter tries to eval() the input, which is what's causing the exception.

在Python 3中，没有raw_input()； input()可以正常工作(不是eval()).

In Python 3, there is no raw_input(); input() would work just fine (it doesn't eval()).

这篇关于NameError:未定义名称“现在"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！