ui.py 文件源码

def __init__(self, *args, **kwargs):
        # The Windows terminal does not support the hide/show cursor ANSI codes
        # even with colorama. So we'll ensure that hide_cursor is False on
        # Windows.
        # This call neds to go before the super() call, so that hide_cursor
        # is set in time. The base progress bar class writes the "hide cursor"
        # code to the terminal in its init, so if we don't set this soon
        # enough, we get a "hide" with no corresponding "show"...
        if WINDOWS and self.hide_cursor:
            self.hide_cursor = False

        super(WindowsMixin, self).__init__(*args, **kwargs)

        # Check if we are running on Windows and we have the colorama module,
        # if we do then wrap our file with it.
        if WINDOWS and colorama:
            self.file = colorama.AnsiToWin32(self.file)
            # The progress code expects to be able to call self.file.isatty()
            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
            # add it.
            self.file.isatty = lambda: self.file.wrapped.isatty()
            # The progress code expects to be able to call self.file.flush()
            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
            # add it.
            self.file.flush = lambda: self.file.wrapped.flush()