Question

当我运行此程序时：

import time
import sys
login = "Mongoose"
password = "secret"
x = 1

print "Welcome User"
print ""

login = raw_input("Username: ")

password = raw_input("Password: ")

if login == 'Mongoose':
    x = x + 1
else : 
    x = x - 1

if password == 'secret':
    x = x + 1 
else : 
    x = x - 1


if x > 1:
    string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = '...\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)
time.sleep(0.5)
string = 'Access Granted\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)

if x < 1:
    string = 'Access Denied\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.10)

它会发出此错误消息：

Traceback (most recent call last):
     File "./login3.py", line 27, in <module>
        for char in string:
    NameError: name 'string' is not defined

有谁知道如何解决这个问题？

Answer 1

如果x＆lt; = 1。

，则尚未定义字符串

if x > 1:
    string = '...\n'
for char in string:  # <<< string is not yet defined if x <= 1.

Answer 2

if x > 1:
    string = '...\n'

此行导致您的错误，您应该使用string缩进代码的其余部分。或者您应该在if语句中添加else以将string设置为默认值。

终端说'字符串'没有定义

2 个答案: