Question

我有一个React应用来显示图像并裁剪它。我正在使用flask API发布该图像。当我在邮递员中运行我的api时，它工作正常，但在从react server（localhost：3000）向后端服务器（localhost：5000）发出请求时，它会给出此响应。我的参数包括一个带有image_url唯一参数的json。我该怎么做才能解决此问题。请帮忙。谢谢，如果除此以外还需要任何代码，我将其发布。

Traceback (most recent call last):
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 2463, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 2449, in wsgi_app
    response = self.handle_exception(e)
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 1866, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ets/.local/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ets/.local/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/ets/.local/lib/python3.6/site-packages/flask/app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ets/Desktop/pwaProcessRetina/ReactFlaskpwa/mysql.py", line 26, in signUp
    image_url = request.get_json()['image_url']
KeyError: 'image_url'

Answer 1

每当请求dict（）对象时，Python都会引发KeyError（使用格式为a = adict [key]），并且密钥不在字典中。

在您的情况下，

KeyError意味着字典中不存在键image_url。打印出JSON并进行验证。

KeyError：“ image_url”回溯（最近一次通话最近）烧瓶烧瓶

1 个答案: