Python pip安装熊猫后无法导入熊猫

我通过

pip

运行以下命令来安装

pandas

：

sudo pip install pandas --upgrade

哪个输出

Requirement already up-to-date: pandas in /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages
Requirement already up-to-date: numpy>=1.7.0 in /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages (from pandas)
Requirement already up-to-date: python-dateutil>=2 in /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages (from pandas)
Requirement already up-to-date: pytz>=2011k in /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages (from pandas)
Requirement already up-to-date: six>=1.5 in /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages (from python-dateutil>=2->pandas)

但是，当我在命令行中使用

python3

时，我无法导入

pandas

：

$ python3
>>> import pandas
>>> Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'pandas'

位于以下位置：

/opt/local/bin/python3

在python3中执行

 >>> import sys
 >>> print(sys.version)

输出

'3.4.5 (default, Jun 27 2016, 04:57:21) \n[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)]'

为什么我不能进口熊猫

编辑：我正在使用pip版本pip3：

pip --version

输出

pip 8.1.2 from /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages (python 3.4)

---

看起来您的操作系统默认使用pip2。这可以通过键入以下内容进行检查：

$ pip --version
pip 8.1.2 from /usr/local/lib/python2.7/dist-packages (python 2.7)

试着像这样使用

pip3

命令：

sudo pip3 install pandas --upgrade

---

哪个pip

告诉你什么？@jxramos

/opt/local/bin/pip

嗯，看起来和python3一样。我在安装多个Python版本时遇到了这类问题，而pip安装到了我不打算安装的版本。你们有蟒蛇吗？检查其已安装的模块，可能会运行一个添加一些全新模块的测试，看看它会在哪里结束；打印（sys.path）？@JohnGordon输出为：[''，/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site packages/pydot_ng-1.0.1.dev0-py3.4.egg'，'/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site packages/mhcflury-0.0.6-py3.4.egg'，'/opt/local/lib/lib/python3.4/site/python3.4/site packages/PyVCF-python3.4/python3.4-macosx-10.11-x86_64.egg'，/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site packages/distribute-0.7.3-py3.4.egg'，对于

pip--version

，我从/opt/local/Library/Frameworks/Python.Frameworks/Versions/3.4/site-packages（python3.4）获得

pip 8.1.2

恐怕这不是问题所在。@ShanZhengYang尝试执行

sys.path.insert（0，“/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site packages”）

然后导入pandas。或者像这样用PYTHONPATH启动python3:

PYTHONPATH=/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/站点包：$PYTHONPATH-python3

sudo pip3 install pandas --upgrade