在Python中是否有goto或任何等价的东西能够跳转到特定的代码行?


当前回答

虽然在Python中没有任何等同于goto/label的代码,但您仍然可以使用循环来获得goto/label的这种功能。

让我们以下面所示的代码示例为例,其中goto/label可以在python以外的任意语言中使用。

String str1 = 'BACK'

label1:
    print('Hello, this program contains goto code\n')
    print('Now type BACK if you want the program to go back to the above line of code. Or press the ENTER key if you want the program to continue with further lines of code')
    str1 = input()

if str1 == 'BACK'
    {
        GoTo label1
    }
print('Program will continue\nBla bla bla...\nBla bla bla...\nBla bla bla...')

现在,通过使用下面所示的while循环,可以在python中实现上述代码示例的相同功能。

str1 = 'BACK'

while str1 == 'BACK':
        print('Hello, this is a python program containing python equivalent code for goto code\n')
        print('Now type BACK if you want the program to go back to the above line of code. Or press the ENTER key if you want the program to continue with further lines of code')
        str1 = input()
print('Program will continue\nBla bla bla...\nBla bla bla...\nBla bla bla...')

其他回答

不,Python不支持标签和goto。它是一种高度结构化的编程语言。

一个工作版本已经完成:http://entrian.com/goto/。

注:这是一个愚人节玩笑。(工作)

# Example 1: Breaking out from a deeply nested loop:
from goto import goto, label

for i in range(1, 10):
    for j in range(1, 20):
        for k in range(1, 30):
            print i, j, k
            if k == 3:
                goto .end
label .end
print "Finished\n"

不用说。是的,它很有趣,但不要使用它。

我想要同样的答案,我不想使用goto。所以我使用了下面的例子(来自learnpythonthehardway)

def sample():
    print "This room is full of gold how much do you want?"
    choice = raw_input("> ")
    how_much = int(choice)
    if "0" in choice or "1" in choice:
        check(how_much)
    else:
        print "Enter a number with 0 or 1"
        sample()

def check(n):
    if n < 150:
        print "You are not greedy, you win"
        exit(0)
    else:
        print "You are nuts!"
        exit(0)

虽然在Python中没有任何等同于goto/label的代码,但您仍然可以使用循环来获得goto/label的这种功能。

让我们以下面所示的代码示例为例,其中goto/label可以在python以外的任意语言中使用。

String str1 = 'BACK'

label1:
    print('Hello, this program contains goto code\n')
    print('Now type BACK if you want the program to go back to the above line of code. Or press the ENTER key if you want the program to continue with further lines of code')
    str1 = input()

if str1 == 'BACK'
    {
        GoTo label1
    }
print('Program will continue\nBla bla bla...\nBla bla bla...\nBla bla bla...')

现在,通过使用下面所示的while循环,可以在python中实现上述代码示例的相同功能。

str1 = 'BACK'

while str1 == 'BACK':
        print('Hello, this is a python program containing python equivalent code for goto code\n')
        print('Now type BACK if you want the program to go back to the above line of code. Or press the ENTER key if you want the program to continue with further lines of code')
        str1 = input()
print('Program will continue\nBla bla bla...\nBla bla bla...\nBla bla bla...')

你可以使用python中的嵌套方法来实现

def func1():
    print("inside func1")
    def inline():
        print("im inside")
    
    inline()
    
func1()