if / else语句出现问题

Question

我对编码还很陌生，遇到了一个我找不到或无法找到答案的问题。

基本上，每次用户在raw_input中输入yes时，它都会吐出'if'字符串，但并不排除'else'字符串。

我假设它是因为延迟造成干扰，而我没有正确设置它，因为在代码中（如果，For，Else），可能是因为For阻碍了代码，我不知道。 希望能有所帮助！ :)

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语句内。

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中的循环具有else子句-在循环运行时执行，不会发出中断

Answer 3

正确缩进for循环，您将得到结果。

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正常终止（不通过中断）。