I have a function that evaluates input, and I need to keep asking for their input and evaluating it until they enter a blank line. How can I set that up?
while input != '': evaluate input I thought of using something like that, but it didn't exactly work. Any help?
There are two ways to do this. First is like this:
while True: # Loop continuously inp = raw_input() # Get the input if inp == "": # If it is a blank line... break # ...break the loop The second is like this:
inp = raw_input() # Get the input while inp != "": # Loop until it is a blank line inp = raw_input() # Get the input again Note that if you are on Python 3.x, you will need to replace raw_input with input.
python repeat until to remind myself that I should just accept that feeling :)This is a small program that will keep asking an input until required input is given.
we should keep the required number as a string, otherwise it may not work. input is taken as string by default
required_number = '18' while True: number = input("Enter the number\n") if number == required_number: print ("GOT IT") break else: print ("Wrong number try again") or you can use eval(input()) method
required_number = 18 while True: number = eval(input("Enter the number\n")) if number == required_number: print ("GOT IT") break else: print ("Wrong number try again") 
you probably want to use a separate value that tracks if the input is valid:
good_input = None while not good_input: user_input = raw_input("enter the right letter : ") if user_input in list_of_good_values: good_input = user_input Easier way:
required_number = 18 user_number = input("Insert a number: ") while f"{required_number} != user_number: print("Oops! Something is wrong") user_number = input("Try again: ") print("That's right!") #continue the code 
