Python currency formatting.

curr_format.py

def format_currency(value, currency, add_symbol=False):

	# Check if value exists
	if value:
		# stores the negative symbol
		symbol = ""
		formatted_currency = ""
		dec = ""
		value = str(value)
		
		# remove minus sign
		if "-" in value:
			value = value.split("-")
			symbol = "-"

		#check if decimal and split
		if "." in value:
			value, dec = value.split(".")
			dec = "." + dec 

		# recursive splitting of currency 
		if len(value) > 3:
			def rec_split(value, formatted_currency):
				
				if len(value) == 3:
					return formatted_currency + value
				elif len(value)%2 == 1:
					formatted_currency = formatted_currency + value[0:2] + ","
					return rec_split(value[2:len(value)], formatted_currency)
				elif len(value) %2 == 0:
					formatted_currency = formatted_currency + value[0:1] + "," 
					return rec_split(value[1:len(value)], formatted_currency)

			return symbol + rec_split(value, formatted_currency) +  dec
		else:
			return symbol + value +  dec