python - Basic Program Control Flow & Exceptions Try -

this question has answer here:

• asking user input until give valid response 9 answers

i attempting create basic program requests numeric value user.

if value between .5 , 1 program should print "good".
if value between 0 0.49 output states "fair".
if numeric input user provides outside of 0 1 states: "try again".
if input cannot converted number states: "invalid input".

here have got far:

val=abs(1) while true:     num = raw_input("enter number: ")         if num == "val" : break     print 'try again between 0 1' try:     num = float(num) except:     print "invalid input"  if .5 < num < 1:         print 'good' if 0 < num < .49:         print 'fair'       

there's couple issues code. i've cleaned code regards think want , commented of changes. should adjustable if have different needs.

val = 1 # abs(1) same 1 while true: # user input     num = raw_input("enter number: ")     try: # indented         num = float(num) # goes except clause if convertion fails         if not 0 <= num <= val: # check against val, not "val",moved try block             print 'try again between 0 1' # indented         else:             break # input ok, out of while loop     except valueerror: # indented, excepting valueerrors, not processor burning errors         print "invalid input"  if .5 <= num <= 1:     print 'good' else: # 0 <= num < 0.5     print 'fair'