The 987654321 / 123456789 thing

the9877654321.py

"""The 987654321 / 123456789 thing"""

import mpmath
import sys

offset = 1e0
limit = 1e1
last = 8

if len(sys.argv) > 1:
  if sys.argv[1].find('e') < 0:
    limit = float(f"1e{int(sys.argv[1]):.0f}")
    offset = float(f"1e{(int(sys.argv[1]) - 1):.0f}")
  else:
    limit = float(f"{sys.argv[1]}")
    if int(sys.argv[1][0]) == 1:
      offset = float(f"9e{int(sys.argv[1][2]) - 1}")
    else:
      offset = float(f"{int(sys.argv[1][0]) - 1}{sys.argv[1][1:]}")
  if len(sys.argv) > 2:
    if sys.argv[2].find('e') < 0:
      offset = float(f"1e{int(sys.argv[2]):.0f}")
    else:
      offset = float(f"{sys.argv[2]}")

def stress(dps) -> None:
  """Tries to overflow"""
  mpmath.mp.dps = dps
  print(f"BEGIN dps = {dps}")
  try:
    last = mpmath.mp.mpf('987654321') / mpmath.mp.mpf('123456789')
    print(last)
    with open("last.txt", "w+") as f:
      f.write(str(last))
  except MemoryError:
    raise
  finally:
    print(f"END dps = {dps}")

print(f"BEGIN ALL limit {limit}, offset {offset}")

try:
  for dps in range(int(offset), int(limit)):
    try:
      stress(dps)
    except MemoryError:
      print(f"Memory error at {dps}. Lower offset from {offset}")
      break
except KeyboardInterrupt:
  pass

print(f"LAST = {last}")

print(f"END ALL limit {limit}, offset {offset}")