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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_italics(self):
 """Parse wiki-style italics."""

        reset = self._head
        try:
            stack = self._parse(contexts.STYLE_ITALICS)
        except BadRoute as route:
            self._head = reset
            if route.context & contexts.STYLE_PASS_AGAIN:
                new_ctx = contexts.STYLE_ITALICS | contexts.STYLE_SECOND_PASS
                stack = self._parse(new_ctx)
            else:
                return self._emit_text("''")
        self._emit_style_tag("i", "''", stack)