cmdoptions.py 文件源码

 复制代码def no_binary():
    return Option(
        "--no-binary", dest="format_control", action="callback",
        callback=_handle_no_binary, type="str",
        default=FormatControl(set(), set()),
        help="Do not use binary packages. Can be supplied multiple times, and "
             "each time adds to the existing value. Accepts either :all: to "
             "disable all binary packages, :none: to empty the set, or one or "
             "more package names with commas between them. Note that some "
             "packages are tricky to compile and may fail to install when "
             "this option is used on them.")