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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 parse(self):
        '''parse is the base function for parsing the recipe, whether it be
           a Dockerfile or Singularity recipe. The recipe is read in as lines,
           and saved to a list if needed for the future. If the client has
           it, the recipe type specific _parse function is called.

           Instructions for making a client subparser:

               It should have a main function _parse that parses a list of lines
               from some recipe text file into the appropriate sections, e.g.,
               
               self.fromHeader
               self.environ
               self.labels
               self.install
               self.files
               self.test
               self.entrypoint

        '''

        self.cmd = None
        self.comments = []
        self.entrypoint = None
        self.environ = []
        self.files = []
        self.install = []
        self.labels = []
        self.ports = []
        self.test = None
        self.volumes = []

        if self.recipe:

            # Read in the raw lines of the file
            self.lines = read_file(self.recipe)

            # If properly instantiated by Docker or Singularity Recipe, parse
            if hasattr(self, '_parse'):
                self._parse()