Default values on empty user input
Python 3:
input = int(input("Enter the inputs : ") or "42")Python 2:
input = int(raw_input("Enter the inputs : ") or "42")How does it work?
If nothing was entered then input/raw_input returns empty string. Empty string in Python is False, bool("") -> False. Operator or returns first truthy value, which in this case is "42".
This is not sophisticated input validation, because user can enter anything, e.g. ten space symbols, which then would be True.
You can do it like this:
>>> try: input= int(raw_input("Enter the inputs : ")) except ValueError: input = 0Enter the inputs : >>> input0>>>
One way is:
default = 0.025input = raw_input("Enter the inputs : ")if not input: input = defaultAnother way can be:
input = raw_input("Number: ") or 0.025Same applies for Python 3, but using input():
ip = input("Ip Address: ") or "127.0.0.1"