Python main的命令行参数（sys.argv） Python

自己写了一个功能函数方便自己使用，突然意识到需要用到sys.argv来传参，于是记录一下。
python使用sys.argv来传参。例如：我自己写了一个字符替换的python程序replace.py。

# -*- coding:utf-8 -*- import sysclass replace: def __init__(self, argv): ''' source: the old chars destination: the new chars ''' print '"'+argv[0]+'"' if len(argv) == 5: self.fileName = argv[1] self.outFile = argv[2] self.source = argv[3] self.destination = argv[4] elif len(argv) == 4: self.fileName = argv[1] self.outFile = argv[2] self.source = argv[3] self.destination = '' elif len(argv) == 3: self.fileName = "content.txt" self.outFile = "result.txt" self.source = argv[1] self.destination = argv[2] elif len(argv) == 2: self.fileName = "content.txt" self.outFile = "result.txt" self.source = argv[1] self.destination = '' elif len(argv) == 1: self.fileName = "content.txt" self.outFile = "result.txt" self.source = ":" self.destination = ''def setSource(self, source): self.source = sourcedef setDestination(self, destination): self.destination = destinationdef replaceContent(self): content = open(self.fileName, 'r') result = open(self.outFile, 'w') for line in content.readlines(): print >> result, line.replace(self.source, self.destination) result.close() content.close()def replaceContentPos(self, positions): pos = 1 start = 0 content = open(self.fileName, 'r') result = open(self.outFile, 'w') for line in content.readlines(): if (pos == positions[start]): print >> result, line.replace(self.source, self.destination) start += 1 pos += 1 result.close() content.close()if (__name__ == '__main__'): mine = replace(sys.argv) mine.replaceContent()

【Python main的命令行参数（sys.argv）】可以看到，我在每一次初始化时输出了传入参数的第一个参数，那么我在命令中就执行“replace.py : -.-（将”content.txt”文件中的”:”替换为”-.-“，并保存在”result.txt”中）“，结果如下：