python matplotlib-在python 2.7shell中出現如下錯誤

在python 2.7shell中出現如下錯誤

import matplotlib
import matplotlib.pyplot as plt

Traceback (most recent call last):
File "", line 1, in
import matplotlib.pyplot as plt
File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 29, in
from matplotlib.figure import Figure, figaspect
File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 36, in
from matplotlib.axes import Axes, SubplotBase, subplot_class_factory
File "C:\Python27\lib\site-packages\matplotlib\axes.py", line 20, in
import matplotlib.dates as _ # <-registers a date unit converter
File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 119, in
from dateutil.rrule import (rrule, MO, TU, WE, TH, FR, SA, SU, YEARLY,
File "C:\Python27\lib\dateutil\rrule.py", line 16, in
from six.moves import _thread
ImportError: cannot import name _thread

最佳回答：

這個模塊沒有裝好吧？