升级matplotlib后，我无法根据日期时间对象进行绘图。
以下错误：
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/pyplot.py", line 2813, in plot
is not None else {}), **kwargs)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/__init__.py", line 1810, in inner
return func(ax, *args, **kwargs)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_axes.py", line 1611, in plot
for line in self._get_lines(*args, **kwargs):
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 393, in _grab_next_args
yield from self._plot_args(this, kwargs)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 370, in _plot_args
x, y = self._xy_from_xy(x, y)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 204, in _xy_from_xy
bx = self.axes.xaxis.update_units(x)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axis.py", line 1475, in update_units
self.set_units(default)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axis.py", line 1548, in set_units
self._update_axisinfo()
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axis.py", line 1490, in _update_axisinfo
info = self.converter.axisinfo(self.units, self)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/pandas/plotting/_converter.py", line 353, in axisinfo
majfmt = PandasAutoDateFormatter(majloc, tz=tz)
File "/opt/anaconda3/envs/py36/lib/python3.6/site-packages/pandas/plotting/_converter.py", line 367, in __init__
self._tz._utcoffset = self._tz.utcoffset(None)
AttributeError: 'datetime.timezone' object has no attribute '_utcoffset'
是否可以在不丧失Python功能的情况下进行升级？