我尝试在我的python脚本中使用matplotlib，但在终端中遇到此错误：

Traceback (most recent call last):
  File "graphique.py", line 5, in <module>
    import matplotlib.pyplot as plt
  File "/home/xavier/anaconda/lib/python2.7/site-packages/matplotlib/__init__.py", line 1048, in <module>
    rcParams = rc_params()
  File "/home/xavier/anaconda/lib/python2.7/site-packages/matplotlib/__init__.py", line 897, in rc_params
    fname = matplotlib_fname()
  File "/home/xavier/anaconda/lib/python2.7/site-packages/matplotlib/__init__.py", line 748, in matplotlib_fname
    fname = os.path.join(os.getcwd(), 'matplotlibrc')
  File "/home/xavier/anaconda/lib/python2.7/posixpath.py", line 80, in join
    path += '/' + b
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 66: ordinal not in range(128)

这是我的python代码，我只是写了

# -*- coding: utf-8 -*-
import numpy as np
from math import *
import matplotlib.pyplot as plt

我需要做什么？