map_number.py

import sys
# Scripts maps a number between b0 - b1 onto the a0 - a1 scale.

# Config is hardcoded for faster data input when using the same range over and over again
a0 = float(0)
a1 = float(500)
b0 = float(61)
b1 = float(538)

try:
    if(len(sys.argv) == 1):
        # Use the same scales over and over again to map different values
        while(True):
            number = float(input("Enter the number you want to map: "))

            mapped = ((number - b0)/(b1 - b0) * (a1 - a0)) + a0
            print(mapped)


    elif(len(sys.argv) == 2):
        # Map only one value (the one given as argument) on the scales that are hardcoded above
        number = float(sys.argv[1])
        mapped = ((number - b0)/(b1 - b0) * (a1 - a0)) + a0
        print(mapped)

        
    elif(len(sys.argv) == 6):
        # Map the value on the scales given in argument
        number = float(sys.argv[1])
        a0 = float(sys.argv[4])
        a1 = float(sys.argv[5])
        b0 = float(sys.argv[2])
        b1 = float(sys.argv[3])

        mapped = ((number - b0)/(b1 - b0) * (a1 - a0)) + a0
        print(mapped)
        
except:
    HELP_MESSAGE = """
    Incorrect usage! Printing help...\n
    Three usages are possible:

    1) No arguments are given: map.py
    Make an infinite loop that asks for a single value, the one to be mapped. The value is then mapped from and to scales that are defines/hardcoded in the python script. Very useful for batch processing values in the same context.

    2) Give one number as argument: map.py [value]
    Maps just that one value on the scales that are set/hardcoded in the script. This option is the least useful. Might come in handy if you have a small amount of values to map every now and then but each time on the same intervals.

    3) Provide 5 arguments: map.py [value] [from_low] [from_high] [to_low] [to_high]
    Maps the number [value] considered to be somewhere in the from_ interval on the to_ interval. Can be called in a loop in bash for instance for batch processing values on different intervals.
    """
    print(HELP_MESSAGE)