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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def validate(self, fixerrors=True):
 """ Validates that the feature is correctly formatted. Parameters: - **fixerrors** (optional):
 Attempts to fix minor errors without raising exceptions (defaults to True) Returns: - True if the feature is valid. Raises: - An Exception if not valid. """

        if not "type" in self._data or self._data["type"] != "Feature":
            if fixerrors:
                self._data["type"] = "Feature"
            else:
                raise Exception("A geojson feature dictionary must contain a type key and it must be named 'Feature'.")
        if not "geometry" in self._data:
            if fixerrors:
                self.geometry = Geometry() # nullgeometry
            else:
                raise Exception("A geojson feature dictionary must contain a geometry key.")
        if not "properties" in self._data or not isinstance(self.properties,dict):
            if fixerrors:
                self._data["properties"] = dict()
            else:
                raise Exception("A geojson feature dictionary must contain a properties key and it must be a dictionary type.")
        self.geometry.validate(fixerrors)
        return True