Python3.7运行web.py测试时出现RuntimeError: generator raised StopIteration异常

太过爱你忘了你带给我的痛 2022-04-05 11:49 504阅读 0赞

刚开始学习python，在运行web.py首页测试代码的时候出现异常。

代码如下：

import web
            
    urls = (
        '/(.*)', 'hello'
    )
    app = web.application(urls, globals())
    
    class hello:        
        def GET(self, name):
            if not name: 
                name = 'World'
            return 'Hello, ' + name + '!'
    
    if __name__ == "__main__":
        app.run()

出现的异常如下：

Traceback (most recent call last):
      File "C:\Users\HHHHH\AppData\Local\Programs\Python\Python37-32\lib\site-packages\web\utils.py", line 526, in take
        yield next(seq)
    StopIteration
    
    The above exception was the direct cause of the following exception:
    
    Traceback (most recent call last):
      File "D:\workspace\HelloPython\Helloworld.py", line 7, in <module>
        app = web.application(urls, globals())
      File "C:\Users\HHHHH\AppData\Local\Programs\Python\Python37-32\lib\site-packages\web\application.py", line 62, in __init__
        self.init_mapping(mapping)
      File "C:\Users\HHHHH\AppData\Local\Programs\Python\Python37-32\lib\site-packages\web\application.py", line 130, in init_mapping
        self.mapping = list(utils.group(mapping, 2))
      File "C:\Users\HHHHH\AppData\Local\Programs\Python\Python37-32\lib\site-packages\web\utils.py", line 531, in group
        x = list(take(seq, size))
    RuntimeError: generator raised StopIteration

根据异常提示以找到相应的代码（...utils.py", line 531, in group），如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTkxNzU2_size_16_color_FFFFFF_t_70][]

此处调用524行take方法，根据**[官网资料][Link 1]**修改如下（注意缩进）：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTkxNzU2_size_16_color_FFFFFF_t_70 1][]

修改完成后重启，成功:

![20181212134720495.png][]

--------------------

END

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTkxNzU2_size_16_color_FFFFFF_t_70]: /images/20220405/2265635e12e04d5098ef68a8bce7966d.png
[Link 1]: https://www.python.org/dev/peps/pep-0479/#id43
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTkxNzU2_size_16_color_FFFFFF_t_70 1]: /images/20220405/41f109411f00478e889abb68719fa355.png
[20181212134720495.png]: /images/20220405/cf034923a44d4e5b9c5f06c26aa2273f.png