Class FixedFormatter

lib/matplotlib/ticker.py:325–356

Return fixed strings for tick labels based only on position, not value. .. note:: `.FixedFormatter` should only be used together with `.FixedLocator`. Otherwise, the labels may end up in unexpected positions.

class FixedFormatter(Formatter):
    """
    Return fixed strings for tick labels based only on position, not value.

    .. note::
        `.FixedFormatter` should only be used together with `.FixedLocator`.
        Otherwise, the labels may end up in unexpected positions.
    """

    def __init__(self, seq):
        """Set the sequence *seq* of strings that will be used for labels."""
        self.seq = seq
        self.offset_string = ''

    def __call__(self, x, pos=None):
        """
        Return the label that matches the position, regardless of the value.

        For positions ``pos < len(seq)``, return ``seq[i]`` regardless of
        *x*. Otherwise return empty string. ``seq`` is the sequence of
        strings that this object was initialized with.
        """
        if pos is None or pos >= len(self.seq):
            return ''
        else:
            return self.seq[pos]

    def get_offset(self):
        return self.offset_string

    def set_offset_string(self, ofs):
        self.offset_string = ofs


class FuncFormatter(Formatter):