简单的python程序--图形输出数字参数序列

#!/usr/bin/env python3

import sys

Zero = ["  ***  ",
" *   * ",
"*     *",
"*     *",
"*     *",
" *   * ",
"  ***  "]
One = [" * ", "** ", " * ", " * ", " * ", " * ", "***"]
Two = [" *** ", "*   *", "*  * ", "  *  ", " *   ", "*    ", "*****"]
Three = [" *** ", "*   *", "    *", "  ** ", "    *", "*   *", " *** "]
Four = ["   *  ", "  **  ", " * *  ", "*  *  ", "******", "   *  ",
"   *  "]
Five = ["*****", "*    ", "*    ", " *** ", "    *", "*   *", " *** "]
Six = [" *** ", "*    ", "*    ", "**** ", "*   *", "*   *", " *** "]
Seven = ["*****", "    *", "   * ", "  *  ", " *   ", "*    ", "*    "]
Eight = [" *** ", "*   *", "*   *", " *** ", "*   *", "*   *", " *** "]
Nine = [" ****", "*   *", "*   *", " ****", "    *", "    *", "    *"]

Digits = [Zero, One, Two, Three, Four, Five, Six, Seven, Eight, Nine]

try:
digits = sys.argv[1]
row = 0
while row < 7:
line = ""
column = 0
while column < len(digits):
number = int(digits[column])
digit = Digits[number]
for char in digit[row]:
if(char=='*'):
char=str(number)
line += char
line += " "
column += 1
print(line)
row += 1
except IndexError:
print("usage: bigdigits.py <number>")
except ValueError as err:
print(err, "in", digits)