75、python学习第一篇

1、sys包下边的argv方法，从控制台获取数据

'''

Created on 2017年4月8日

@author: weizhen

'''

import sys

One = [" * ", "**", " * ", " * ", " * ", "***",'*********']

Two = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Three = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Four = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Five = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Six = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Seven = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Eight = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Night = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Ten = ["***", "*   *", "*  *", "  *", " * ", "***",'*********']

Digits = [One, Two, Three, Four, Five, Six, Seven, Eight, Night, Ten]

try:

    digits = sys.argv[1]

    row = 0

    while row < 7:

        line = ""

        column = 0

        while column < len(digits):

            number = int(digits[column])

            digit = Digits[number]

            line += digit[row] + " "

            column += 1

            print(line+'in')

        print(line+'out')

        row += 1

except IndexError:

    print("usage:bigdigits.py <number>")

就是会判断输入值的大小，并根据控制台输入数组的大小去对字符串进行append

这里要指出，line += digit[row] + " "这一行只是对字符串进行append，所有会用+=并不是对字符串进行连加