我为python创建了一个名为quora的虚拟环境。我安装了车轮，然后按照指示安装了熊猫。由于某种原因，我无法让熊猫上班。有人能帮我吗。我已经尝试了该网站上针对类似问题的所有其他解决方案。还是没用。

(quora) (jessie)griffith@localhost:~/environments$ sudo pip install wheel
Requirement already satisfied: wheel in /usr/lib/python2.7/dist-packages
(quora) (jessie)griffith@localhost:~/environments$ sudo pip install pandas
Requirement already satisfied: pandas in /usr/local/lib/python2.7/dist-packages
Requirement already satisfied: pytz>=2011k in /usr/local/lib/python2.7/dist-packages (from pandas)
Requirement already satisfied: numpy>=1.7.0 in /usr/local/lib/python2.7/dist-packages (from pandas)
Requirement already satisfied: python-dateutil in /usr/local/lib/python2.7/dist-packages (from pandas)
Requirement already satisfied: six>=1.5 in /usr/lib/python2.7/dist-packages (from python-dateutil->pandas)

(quora) (jessie)griffith@localhost:~/environments$ python getdata.py
Traceback (most recent call last):
  File "getdata.py", line 2, in <module>
    import pandas as pd
ImportError: No module named 'pandas'