启动报错了。。。但不知道怎么解决（依赖都装全了）ubuntu 16.04

[lgs3137]

Traceback (most recent call last):
File "main.py", line 13, in
from ActivityInfo import ActivityInfo
File "/opt/WechatForwardBot/ActivityInfo.py", line 8, in
import matplotlib.pyplot as pp
File "/usr/local/lib/python3.5/dist-packages/matplotlib/pyplot.py", line 37, in
from matplotlib.figure import Figure, figaspect
File "/usr/local/lib/python3.5/dist-packages/matplotlib/figure.py", line 40, in
from matplotlib.axes import Axes, SubplotBase, subplot_class_factory
File "/usr/local/lib/python3.5/dist-packages/matplotlib/axes/init.py", line 4, in
from ._subplots import *
File "/usr/local/lib/python3.5/dist-packages/matplotlib/axes/_subplots.py", line 10, in
from matplotlib.axes._axes import Axes
File "/usr/local/lib/python3.5/dist-packages/matplotlib/axes/_axes.py", line 24, in
import matplotlib.dates as _ # <-registers a date unit converter
File "/usr/local/lib/python3.5/dist-packages/matplotlib/dates.py", line 125, in
from dateutil.rrule import (rrule, MO, TU, WE, TH, FR, SA, SU, YEARLY,
File "/usr/local/lib/python3.5/dist-packages/dateutil/rrule.py", line 55
raise ValueError, "Can't create weekday with n == 0"
^
SyntaxError: invalid syntax

[lgs3137]

sudo pip3 install python-dateutil --upgrade
完美解决了~