Self Locate

pi = ''

with open('/path/to/pi.txt') as the_file: pi = the_file.read()      # This file should start without "3." in the front

for n in range(1, 8):
    for i in range(0, len(pi)):
        end_of = i + n
        num = pi[i:end_of]

        if num == str(end_of):
            print(num)

        if end_of > num: break

"""
Pi:     (1), (315), 360, 384, (1045794)

Phi:        8, (20), 62, (466), (4854), 46914, 48949

e:          62, (3999), 340616, (350954), (776064), (1382603), (1898195)

2Pi:        (3), 79, (470), 816, 62180, 92253, (1493476)
"""