Untitled

#!/usr/bin/python3

BDAY_NOT_FOUND = -1
# find() starts at 0, not 1
IDX_OFFSET = 1
READ_ONLY = 'r'

# read pi into a string
with open('pi.txt', READ_ONLY) as fd:
    data = fd.read().rstrip()

digits = int(input("How many digits: "))
bday = input("Enter bday [mmddyyyy]: ")
pos = data.find(bday) + IDX_OFFSET

if (pos == BDAY_NOT_FOUND):
    print("Your bday can not be found")
else:
    print(f"Your birthday is located at position {pos} of pi")