__init__.py 文件源码

def determine_clipboard():
    # Determine the OS/platform and set the copy() and paste() functions accordingly.
    if 'cygwin' in platform.system().lower():
        return init_windows_clipboard(cygwin=True)
    if os.name == 'nt' or platform.system() == 'Windows':
        return init_windows_clipboard()
    if os.name == 'mac' or platform.system() == 'Darwin':
        return init_osx_clipboard()
    if HAS_DISPLAY:
        # Determine which command/module is installed, if any.
        try:
            import gtk  # check if gtk is installed
        except ImportError:
            pass
        else:
            return init_gtk_clipboard()

        try:
            import PyQt4  # check if PyQt4 is installed
        except ImportError:
            pass
        else:
            return init_qt_clipboard()

        if _executable_exists("xclip"):
            return init_xclip_clipboard()
        if _executable_exists("xsel"):
            return init_xsel_clipboard()
        if _executable_exists("klipper") and _executable_exists("qdbus"):
            return init_klipper_clipboard()

    return init_no_clipboard()