[Function] Python tips

Written as "+ main function subroutine" code structure, but also because each of the different functions in a single package the function code, to facilitate subsequent modifications, additions and deletions

Import Math 

# variable representative of key switches circulation operation program 
key. 1 = # function information collection DEF MyInput (): 
    Choice = INPUT ( ' Please select the type of calculation: (1 hours worked, 2- calculated human) ' )
     IF Choice = = ' 1 ' : 
        size = float (the iNPUT ( ' Please enter the size of the project: (1 represents the standard size, enter decimals) ' )) 
        number The = int (the iNPUT ( ' Please enter the number of human :( Please enter an integer) ' )) 
        Time = None
         return size, Number, Time
         # where the returned data is a tuple if



    == Choice ' 2 ' : 
        size = a float (INPUT ( ' Enter item size: (1 represents the standard size, enter decimal) ' )) 
        Number = None 
        Time = a float (INPUT ( ' Enter Number Enter hours :( decimal) ' ))
         return size, Number, Time
         # returned here is a tuple 

# complete the calculation function 
DEF Estimated (my_input):
     # the data tuple taken out 
    size = my_input [0] 
    Number = my_input [. 1 ] 
    Time = my_input [2 ]
     # human calculated 
    if(== None Number) and (Time =! None): 
        Number = Math.ceil (size 80 * / Time)
         Print ( ' item% .1f standard size item, if necessary created% .1f man-hours, the desired number of human:% d people ' % (size, Time, number)) 
     # hours worked 
    elif (number = None)! and (Time == None): 
        Time = 80 size * / number
         Print ( ' item size% .1f standard items,% d personal use force completed, the number of man-hours required to:.% 1f a ' % (size, number the, Time))   

# asking whether to continue to function 
DEF Again ():
     # declare global variables key, in order to modify the variable
    , Ltd. Free Join key 
    A = the INPUT ( ' whether to continue calculating continue Enter y, enter a different key to end the program?. ' )
     IF A =! ' the y- ' :
         # If you do not enter 'y', put the key assignment for the 0 
        key = 0   

# main function 
DEF main ():
     Print ( ' Welcome to the workload calculation applet! ' )
     the while Key == 1 : 
        my_input = MyInput () 
        Estimated (my_input) 
        Again () 
    Print ( ' thank you for using workload calculation applet ! ' ) 

main ()