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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 execute_command(self):
 """ The run command implements the web content extractor corresponding to the given \ configuration file. The execute_command() validates the input project name and opens the JSON \ configuration file. The run() method handles the execution of the extractor run. The extractor implementation follows these primary steps : 1. Selects the appropriate :ref:`selector class <implementation-selectors>` through \ a dynamic dispatch, with the selector_type argument from the CLI input. #. Iterate through the data section in level-0 of the configuration file. \ On each data item, call the extract_content() method from the selector class to \ extract the content according to the specified extractor rule. #. If there are multiple levels of the extractor, i.e, if there is a 'next' \ attribute in the configuration file, call the traverse_next() \ :ref:`utility function <implementation-utils>` and parse through successive levels \ of the configuration file. #. According to the --output_type argument, the result data is saved in a JSON \ document or a CSV document. """

        try:
            self.args['--verbosity'] = int(self.args['--verbosity'])
            if self.args['--verbosity'] not in [0, 1, 2]:
                raise ValueError
            if self.args['--verbosity'] > 0:
                print(Back.GREEN + Fore.BLACK + "Scrapple Run")
                print(Back.RESET + Fore.RESET)
            import json
            with open(self.args['<projectname>'] + '.json', 'r') as f:
                self.config = json.load(f)
            validate_config(self.config)
            self.run()
        except ValueError:
            print(Back.WHITE + Fore.RED + "Use 0, 1 or 2 for verbosity." \
                + Back.RESET + Fore.RESET, sep="")
        except IOError:
            print(Back.WHITE + Fore.RED + self.args['<projectname>'], ".json does not ", \
                  "exist. Use ``scrapple genconfig``." + Back.RESET + Fore.RESET, sep="")
        except InvalidConfigException as e:
            print(Back.WHITE + Fore.RED + e + Back.RESET + Fore.RESET, sep="")