Elephant School - Case 1- Currency Converter

Currency Converter 4.0

"""
    Author: Li Xin
    Function: Currency Converter
    Version: 5.0
    Date: 01/02/2020
    2.0 New: The input is judged RMB or US dollars, convert the corresponding calculated
    3.0 New feature: you can have the program running until the user chooses to exit
    4.0 feature: the exchange rate functions to the function package
    5.0 add features: (1) the structure of the program (2) a simple function definition lambda
"""


# DEF convert_currency (IM, ER): 
#      "" " 
#          exchange rate function 
#      " "" 
#      OUT = IM * ER 
#      return OUT


def main():
    """
        The main function
    "" " 
    # Exchange rate
    USD_VS_RMB = 6.77

    # With units of currency input 
    currency_str_value the INPUT = ( ' Please enter the amount of money with units: ' )

    unit = currency_str_value[-3:]

    if unit == 'CNY':
        exchange_rate = 1 / USD_VS_RMB

    elif unit == 'USD':
        exchange_rate = USD_VS_RMB

    else:
        exchange_rate = -1

    if exchange_rate != -1:
        in_money = the eval (currency_str_value [: -. 3 ])
         # using lambda-defined function 
        convert_currency2 = lambda X: X * EXCHANGE_RATE

        # # Call the function 
        # out_money = convert_currency (in_money, EXCHANGE_RATE)

        # Call the lambda function 
        out_money = convert_currency2 (in_money)
         Print ( ' the converted amount: ' , out_money)
     the else :
         Print ( ' ! Does not support the currency ' )

if __name__ == '__main__':
    main()

Knock blackboard! ! ! ! ! !

1. Define the variable
2. input、print、
3. List