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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 get(self, s):
 """ Returns all lines that contain `s` anywhere and wrap them in a list of dictionaries. `s` can be either a single string or a string list. For list, all keywords in the list must be found in each line. Parameters: s(str or list):
 one or more strings to search for. Returns: (list):
 list of dictionaries corresponding to the parsed lines contain the `s`. """

        ret = []
        search_by_expression = self._valid_search(s)
        for l in self.lines:
            if search_by_expression(l):
                ret.append(self._parse_line(l))
        return ret