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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 escape_meta(self, string, pos):
 		""" 		Checks if a meta character is escaped or else warns about it. 		If the meta character has an escape character ('\') preceding it, 		the meta character is escaped. If it does not, a warning is emitted 		that the user should escape it. 		Arguments: 			string (str):
 The relevant string in which the character was found. 			pos (int):
 The index of the meta character within the string. 		Returns: 			The possibly escaped string and the next meta match. 		"""


		# Replace escape character
		if pos > 0 and string[pos - 1] == "\\":
			string = string[:pos - 1] + string[pos:]
		else:
			warnings.warn("Un-escaped meta-character: '{0}' (Escape"
						  " it with a '\\')".format(string[pos]),
						  Warning)
			pos += 1

		meta = self.meta.search(string, pos)

		return string, meta