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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 GetEmail(prompt):
 	"""Prompts the user for their email address and returns it. 	The last used email address is saved to a file and offered up as a suggestion 	to the user. If the user presses enter without typing in anything the last 	used email address is used. If the user enters a new address, it is saved 	for next time we prompt. 	"""

	last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
	last_email = ""
	if os.path.exists(last_email_file_name):
		try:
			last_email_file = open(last_email_file_name, "r")
			last_email = last_email_file.readline().strip("\n")
			last_email_file.close()
			prompt += " [%s]" % last_email
		except IOError, e:
			pass
	email = raw_input(prompt + ": ").strip()
	if email:
		try:
			last_email_file = open(last_email_file_name, "w")
			last_email_file.write(email)
			last_email_file.close()
		except IOError, e:
			pass
	else:
		email = last_email
	return email