2.1.1 参数传递 Argument Passing

When known to the interpreter, the script name and additional arguments thereafter are passed to the script in the variable sys.argv, which is a list of strings. Its length is at least one; when no script and no arguments are given, sys.argv[0] is an empty string. When the script name is given as '-' (meaning standard input), sys.argv[0] is set to '-'. When -c command is used, sys.argv[0] is set to '-c'. Options found after -c command are not consumed by the Python interpreter's option processing but left in sys.argv for the command to handle.

调用解释器时，脚本名和附加参数之传入一个名为 sys.argv 的字符串列表。没有脚本和参数时，它至少也有一个元素： sys.argv[0] 此时为空字符串。脚本名指定为 '-' （表示标准输入）时， sys.argv[0]被设置为'-'，使用 -c 指令 时， sys.argv[0] 被设定为'-c'。 -c 命令之后的参数不会被 Python 解释器的选项处理机制所截获，而是留在sys.argv 中，供脚本命令操作。