How can I make my condition check case-insensitive?

Question

My first Python program gets an input from the user about his birthday and calculate if he or she is 18+.

My while loop won't continue if the string "check" is equal to true; it's only working for True. Why not?

import time
import datetime

check = "Null"
year_born = month_born = day_born = 0

while check != "True":
#or check!="true":
        year_born = input("what year were you born?")
        month_born = input("what month were you born?")
        day_born = input("what day were you born?")
        check = raw_input("your birth day is on {0}/{1}/{2}... type 'True' to confirme: ".format(day_born, month_born, year_born))

year_now = int(datetime.date.today().strftime("%Y"))
month_now = int(datetime.date.today().strftime("%m"))
day_now = int(datetime.date.today().strftime("%d"))

if (year_now - 18 > year_born) or (year_now - 18 == year_born and month_born <= month_now and day_born <= day_now):
        print("You are 18+. you are allowed to enter")

else: 
        print("Good bye")

I tried while check != "True" or "true" and while check != "True" or check != "true" and while ((check != "True") or (check != "true)). None of them seem to work; it's just ignoring "true" and "True" and keeps looping.

Why do you have the second part of the condition on the next line in a comment? — Carcigenicate, Nov 28 '17 at 23:24
Input returns a string, so `year_born` etc are not numbers. You have to convert them with `int()` into an integer to perform a subtraction. — Mr. T, Nov 28 '17 at 23:31
Moment of clarity: why are you storing a bool as a string? You could simplify it a lot by having `check = False ` and then `while check:` — Jakob Lovern, Nov 28 '17 at 23:33

score 1 · Answer 1 · answered Nov 28 '17 at 23:26

1

Try normalizing the input by using .lower().

>>> 'True'.lower() == 'true'
True
>>> 'true'.lower() == 'true'
True
>>> 'TRUE'.lower() == 'true'
True

answered Nov 28 '17 at 23:26

Evan

1,348
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score 0 · Answer 2 · answered Nov 28 '17 at 23:30

0

You did something weird with the while conditional. Try while check not in ["true","True"]:

answered Nov 28 '17 at 23:30

Jakob Lovern

1,301
7
24

How can I make my condition check case-insensitive?

2 Answers2