Printer_errors.py

'''
Printer Errors :
In a factory a printer prints labels for boxes. For one kind of boxes the printer has to use colors which, for the sake of simplicity, are named with letters from a to m.

The colors used by the printer are recorded in a control string. For example a "good" control string would be aaabbbbhaijjjm meaning that the printer used three times color a, four times color b, then one time color a...

Sometimes there are problems: lack of colors, technical malfunction and a "bad" control string is produced e.g. aaaxbbbbyyhwawiwjjjwwm.

You have to write a function printer_error which given a string will output the error rate of the printer as a string representing a rational whose numerator is the number of errors and the denominator the length of the control string. Don't reduce this fraction to a simpler expression.

The string has a length greater or equal to one and contains only letters from ato z.

#Examples:

s="aaabbbbhaijjjm"
error_printer(s) => "0/14"

s="aaaxbbbbyyhwawiwjjjwwm"
error_printer(s) => "8/22"
'''

def printer_error(s):
    denom = len(s)
    
    colours = "abcdefghijklm"
    
    count = 0 
    
    for letter in s:
        for colour in colours:
            if letter == colour:
                count += 1 
                
    numer = denom - count
                
    return str(numer) + "/" + str(denom)


def printer_errors(s):
	denom = len(s)
	numer = 0 
	for letter in s:
		if s > m 
			numer += 1

	return str(numer) + "/" + str(denom)


def printer_errors(s):
	return "{} / {}".format(len[for letter in s if s > m] ,len(s))