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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_epsg(self):
 """ Attempts to determine the EPSG code for a given PRJ file or other similar text-based spatial reference file. First, it looks up the PRJ text in the included epsg.db SQLite database, which was manually sourced and cleaned from an ESRI website, https://developers.arcgis.com/javascript/jshelp/pcs.html If it cannot be found there, it next tries the prj2epsg.org API. If an exact match is found, that EPSG code is returned and saved to the database to avoid future external API calls. TODO: If that API cannot find an exact match but several partial matches, those partials will be displayed to the user with the option to select one to save to the database. """

        cur = self.conn.cursor()
        cur.execute("SELECT epsg_code FROM prj_epsg WHERE prjtext = ?", (self.prj,))
        # prjtext has a unique constraint on it, we should only ever fetchone()
        result = cur.fetchone()
        if not result and self.call_remote_api:
            return self.call_api()
        elif result is not None:
            self.epsg_code = result[0]
            return self.epsg_code