[SOLVED] [PYTHON] OR operator works like AND

Im having a problem with "OR" operator in "if" condition.
At the moment it works like AND.

quit() should be executed if any of the inputs is not numerical/intiger.
Meanwhile, it works ONLY if both inputs are non-numerical/intiger.

I tried to replace | with || and or. No success :(

Can anyone help me out here? What im doing wrong?

Code:#!/usr/bin/python3
import sys

a=input("one: ")
b=input("two: ")

if( a.isdigit() | b.isdigit() ):
print("User input is Number ")
else:
print("One of provided inputs is not a number")
quit()

print (a)
print (b)