Python-сообщество

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import sys, math, cmath
 
if len(sys.argv) != 4:
    sys.exit(u"Usage: %s a b c" % sys.argv[0])
print u"Square equation: %s · xІ + %s · x + %s = 0" % tuple(sys.argv[1:])
a = float(sys.argv[1])
b = float(sys.argv[2])
c = float(sys.argv[3])
if a == 0 and b == 0 and c == 0:
 sys.exit(u"C")
if b == 0 and c == 0:
 sys.exit(u"Root: 0")
if a == 0 and c == 0:
 sys.exit(u"Root: 0")
if a == 0 and b == 0:
 sys.exit(u"No root")
if c == 0:
 print u"Root1: 0"
 sys.exit(u"Root2: " + str(- b / a))
if b == 0:
 if c > 0:
  print u"Root1: " + str(math.sqrt(- c / a))
  sys.exit(u"Root1: " + str(- math.sqrt(- c / a)))
 else:
  print u"Root1: " + str(cmath.sqrt(- c / a))
  sys.exit(u"Root1: " + str(- cmath.sqrt(- c / a)))
if a == 0:
 sys.exit(u"Root:" + str(- c / b))
d = b * b - 4 * a * c
if d < 0:
 print u"Root 1:" + str((- b + cmath.sqrt(d)) / (2 * a))
 sys.exit(u"Root2:" + str((- b - cmath.sqrt(d)) / (2 * a)))
else: 
 print u"Root 1:" + str((- b + math.sqrt(d)) / (2 * a))
 sys.exit(u"Root2:" + str((- b - math.sqrt(d)) / (2 * a)))

if any(float(coeff) == 0 for coeff in sys.argv[1:]):
        sys.exit(u"Coefficients must be non-zero")

if b == 0 and c == 0: