python名称错误错误[重复]答案

【问题标题】：Error on python nameERROR [duplicate]python名称错误错误[重复]
【发布时间】：2013-11-17 03:38:18
【问题描述】：

运行以下

golfFile = open("golf.dat","a")
another = "Y"
while another=="Y":
    Name = input("What is the player's name?: ")
    Score = input("What is the player's score?: ")
    golfFile.write(Name+"\n")
    golfFile.write(Score+"\n")
    another = input("Do you wish to enter another player? (Y for yes): ")
    print()
golfFile.close()
print("Data saved to golf.dat")

出现以下错误玩家叫什么名字？：j

Traceback (most recent call last):
  File "C:\Users\Nancy\Desktop\Calhoun\CIS\Chapter10#6A.py", line 4, in <module>
    Name = input("What is the player's name?: ")
  File "<string>", line 1, in <module>
NameError: name 'j' is not defined

【问题讨论】：

标签： python

【解决方案1】：

在 Python 2.7 中，input 尝试将输入评估为 Python 表达式，而 raw_input 将其评估为字符串。显然，j 不是一个有效的表达式。在某些情况下，使用input 实际上是危险的——您不希望用户能够在您的应用程序中执行任意代码！

因此，您要查找的是raw_input。

Python 3 没有raw_input，旧的raw_input 已重命名为input。所以，如果你在 Python 3 中尝试过你的代码，它就可以工作。

golfFile = open("golf.dat","a")
another = "Y"
while another=="Y":
    Name = raw_input("What is the player's name?: ")
    Score = raw_input("What is the player's score?: ")
    golfFile.write(Name+"\n")
    golfFile.write(Score+"\n")
    another = raw_input("Do you wish to enter another player? (Y for yes): ")
    print()
golfFile.close()
print("Data saved to golf.dat")

测试：

>>> Name = input("What is the player's name?: ")
What is the player's name?: j
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
NameError: name 'j' is not defined
>>> Name = raw_input("What is the player's name?: ")
What is the player's name?: j
>>> Name
'j'

【讨论】：

【解决方案2】：

您可能想要使用raw_input 而不是input：

Name = raw_input("What is the player's name?: ")
Score = raw_input("What is the player's score?: ")

【讨论】：