I get this error when i try to import matplotlib. I have installed matplotlib.
Traceback (most recent call last):   
  File "<pyshell#23>", line 1, in <module>     
   import matplotlib   
  File "C:\Python27\lib\site-packages\matplotlib\__init__.py", line 110, in <module>     
   raise ImportError("matplotlib requires dateutil") 
ImportError: matplotlib requires dateutil 
how do I solve this problem?
 
     
    