builtins.KeyError

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 2309, in __call__

      def __call__(self, environ, start_response):

          """The WSGI server calls the Flask application object as the

          WSGI application. This calls :meth:`wsgi_app` which can be

          wrapped to applying middleware."""

          return self.wsgi_app(environ, start_response)

      def __repr__(self):

          return '<%s %r>' % (

              self.__class__.__name__,

              self.name,

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 2295, in wsgi_app

              try:

                  ctx.push()

                  response = self.full_dispatch_request()

              except Exception as e:

                  error = e

                  response = self.handle_exception(e)

              except:

                  error = sys.exc_info()[1]

                  raise

              return response(environ, start_response)

          finally:

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 1741, in handle_exception

              # if we want to repropagate the exception, we can attempt to

              # raise it with the whole traceback in case we can do that

              # (the function was actually called from the except part)

              # otherwise, we just raise the error again

              if exc_value is e:

                  reraise(exc_type, exc_value, tb)

              else:

                  raise e

          self.log_exception((exc_type, exc_value, tb))

          if handler is None:

• File "C:\anaconda3\lib\site-packages\flask\_compat.py", line 35, in reraise

      from io import StringIO

      def reraise(tp, value, tb=None):

          if value.__traceback__ is not tb:

              raise value.with_traceback(tb)

          raise value

      implements_to_string = _identity

  else:

      text_type = unicode

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 2292, in wsgi_app

          ctx = self.request_context(environ)

          error = None

          try:

              try:

                  ctx.push()

                  response = self.full_dispatch_request()

              except Exception as e:

                  error = e

                  response = self.handle_exception(e)

              except:

                  error = sys.exc_info()[1]

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 1815, in full_dispatch_request

              request_started.send(self)

              rv = self.preprocess_request()

              if rv is None:

                  rv = self.dispatch_request()

          except Exception as e:

              rv = self.handle_user_exception(e)

          return self.finalize_request(rv)

      def finalize_request(self, rv, from_error_handler=False):

          """Given the return value from a view function this finalizes

          the request by converting it into a response and invoking the

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 1718, in handle_user_exception

              return self.handle_http_exception(e)

          handler = self._find_error_handler(e)

          if handler is None:

              reraise(exc_type, exc_value, tb)

          return handler(e)

      def handle_exception(self, e):

          """Default exception handling that kicks in when an exception

          occurs that is not caught.  In debug mode the exception will

• File "C:\anaconda3\lib\site-packages\flask\_compat.py", line 35, in reraise

      from io import StringIO

      def reraise(tp, value, tb=None):

          if value.__traceback__ is not tb:

              raise value.with_traceback(tb)

          raise value

      implements_to_string = _identity

  else:

      text_type = unicode

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 1813, in full_dispatch_request

          self.try_trigger_before_first_request_functions()

          try:

              request_started.send(self)

              rv = self.preprocess_request()

              if rv is None:

                  rv = self.dispatch_request()

          except Exception as e:

              rv = self.handle_user_exception(e)

          return self.finalize_request(rv)

      def finalize_request(self, rv, from_error_handler=False):

• File "C:\anaconda3\lib\site-packages\flask\app.py", line 1799, in dispatch_request

          # request came with the OPTIONS method, reply automatically

          if getattr(rule, 'provide_automatic_options', False) \

             and req.method == 'OPTIONS':

              return self.make_default_options_response()

          # otherwise dispatch to the handler for that endpoint

          return self.view_functions[rule.endpoint](**req.view_args)

      def full_dispatch_request(self):

          """Dispatches the request and on top of that performs request

          pre and postprocessing as well as HTTP exception catching and

          error handling.

• File "C:\pythoncode\google tranlate\app.py", line 235, in caiyunfy

  @app.route('/caiyunfy',methods=['GET','POST'])

  def caiyunfy():

      source = request.values.get('q') #获取参数

      type = request.values.get('t') #获取参数

      target = tranlate(source, type)

      return target

  @app.route('/mymemoryfy',methods=['GET','POST'])

  def mymemoryfy():

      txt = request.values.get('q') #获取参数

• File "C:\pythoncode\google tranlate\app.py", line 99, in tranlate

              'x-authorization': "token " + token,

      }

      response = requests.request("POST", url, data=json.dumps(payload), headers=headers)

      return json.loads(response.text)['target']

  # Flask初始化参数尽量使用你的包名，这个初始化方式是官方推荐的，官方解释：http://flask.pocoo.org/docs/0.12/api/#flask.Flask

  app = Flask(__name__)

KeyError: 'target'