"""
In Python, integers have arbitrary precision.
This means they can grow as large as needed, limited only by memory.
A petabyte fits easily:
1 PiB = 2**50 = 1,125,899,906,842,624 bytes
1 PB = 10**15 = 1,000,000,000,000,000 bytes
We define constants using uppercase names (Python convention).
"""
# Binary petabyte (pebibyte), using a bit shift.
# 1 << 50 = 2**50 bytes.
PETABYTE_PIB = 1 << 50 # not a constant - just don't change it
# Decimal petabyte (SI petabyte), using a readable numeric literal.
# Python allows underscores for digit grouping.
PETABYTE_PB = 1_000_000_000_000_000
print("1 PiB =", PETABYTE_PIB, "bytes")
print("1 PB =", PETABYTE_PB, "bytes")
'''
run:
1 PiB = 1125899906842624 bytes
1 PB = 1000000000000000 bytes
'''
