Python 为什么我的程序说里根没有定义，即使我用双引号引用了这个名字，我的意思是'；这不是一个变量吗？

更新

这是从终端运行时程序的输出：

print ("This is a simple login")
while True:
    enter = input("Enter the password for this computer: ")
    if enter == "Reagan":
        time.sleep(1)
        print ("Your Login is successful")
    else:
        print ("Password didn't match! ")

C:\Python27\python.exe“C:/python编程/Practice/for loops.py”
这是一个简单的登录
这台计算机的密码：Reagan
回溯（最近一次调用last）：文件“C:/Python Programming/Practice/for loops.py”，
第3行，在enter=input（“输入此计算机的密码：”）文件“”中，
NameError中的第1行：未定义名称“Reagan”，进程已结束，退出代码为1

您需要

原始输入（）

Python 2？使用
raw_input
not
input
您的代码错误，缺少缩进！！
C:\Python27\python.exe "C:/Python Programming/Practice/for loops.py"        
This is a simple login Enter 
the password for this computer: Reagan 
Traceback (most recent call last): File "C:/Python Programming/Practice/for loops.py", 
line 3, in <module> enter = input("Enter the password for this computer: ") File "<string>",
line 1, in <module> NameError: name 'Reagan' is not defined Process finished with exit code 1

import time
print ("This is a simple login")
while True:
    enter = raw_input("Enter the password for this computer: ")
    if enter == "Reagan":
        time.sleep(1)
        print ("Your Login is successful")
    else:
        print ("Password didn't match! ")