Question

我对编码很新，我遇到了一个我无法弄清楚或找不到答案的问题。

基本上每当用户在raw_input中输入yes时，它会吐出'if'字符串，但不会排除'else'字符串。

我假设它是因为延迟是干扰而我没有正确设置它，因为在代码中（If，For，Else），也许For阻碍了代码，我不知道。非常感谢一些帮助！：）

import sys
import time
string = 'Hello comrade, Welcome!\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.03)
time.sleep(1)
x=raw_input('Are you ready to enter the fascinating Mists of Verocia? ')
if x == 'yes':
   string = "Verocia was a mystical land located just south of Aborne"
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.03)
else:
    print ('Please restart program whenever you are ready!')

Answer 1

请注意缩进。我认为for循环应该在if语句中。

if x == 'yes':
    string = "Verocia was a mystical land located just south of Aborne"
    for char in string:
        sys.stdout.write(char)
        sys.stdout.flush()
        time.sleep(.03)
else:
    print ('Please restart program whenever you are ready!')

Answer 2

您必须缩进 for 循环。 Python中的循环有 else 子句 - 它在循环运行时执行，没有中断发布

Answer 3

正确缩进for循环，您将获得结果。

import sys
import time
strWelcome = 'Hello comrade, Welcome!\n'
for char in strWelcome :
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.03)
time.sleep(1)
x=raw_input('Are you ready to enter the fascinating Mists of Verocia? ')
if x == 'yes':
   str1 = "Verocia was a mystical land located just south of Aborne"
    for char in str1:
        sys.stdout.write(char)
        sys.stdout.flush()
        time.sleep(.03)
else:
    print ('Please restart program whenever you are ready!')

Answer 4

您的代码中存在缩进问题。它应该是：

import sys
import time
string = 'Hello comrade, Welcome!\n'
for char in string:
    sys.stdout.write(char)
    sys.stdout.flush()
    time.sleep(.03)
time.sleep(1)
x=raw_input('Are you ready to enter the fascinating Mists of Verocia? ')
if x == 'yes':
   string = "Verocia was a mystical land located just south of Aborne"
   for char in string:
     sys.stdout.write(char)
     sys.stdout.flush()
     time.sleep(.03)
else:
    print ('Please restart program whenever you are ready!')

Answer 5

在您的示例中，else条件连接到for语句。 else套件在for之后执行，但前提是for for normal（不是中断）。

if / else语句的问题

5 个答案: