'majloc and minloc: TickLocators for the major and minor ticks
majfmt and minfmt: TickFormatters for the major and minor ticks
label: the default axis label
default_limits: the default min, max of the axis if no data is present
If any of the above are None, the axis will simply use the default'

def __init__(self, majloc=None, minloc=None, majfmt=None, minfmt=None, label=None, default_limits=None):

    self.majloc = majloc
    self.minloc = minloc
    self.majfmt = majfmt
    self.minfmt = minfmt
    self.label = label
    self.default_limits = default_limits
