Question

在虚拟环境中，安装numpy后没有问题我运行

pip3 install pandas

返回：编辑：

 Collecting pandas
  Using cached https://files.pythonhosted.org/packages/08/01/803834bc8a4e708aedebb133095a88a4dad9f45bbaf5ad777d2bea543c7e/pandas-0.22.0.tar.gz
  Installing build dependencies ... error
  Complete output from command /home/bonzay/Desktop/Final_Project/venv/bin/python3.4 -m pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-4pcvmc12 https://files.pythonhosted.org/packages/81/30/e935244ca6165187ae8be876b6316ae201b71485538ffac1d718843025a9/wheel-0.31.1-py2.py3-none-any.whl#sha256=80044e51ec5bbf6c894ba0bc48d26a8c20a9ba629f4ca19ea26ecfcf87685f5f https://files.pythonhosted.org/packages/8c/10/79282747f9169f21c053c562a0baa21815a8c7879be97abd930dbcf862e8/setuptools-39.1.0-py2.py3-none-any.whl#sha256=0cb8b8625bfdcc2d43ea4b9cdba0b39b2b7befc04f3088897031082aa16ce186 https://files.pythonhosted.org/packages/70/25/1e1521e6ce2cf78ff4a8b06fbc2cd513ce004ec337000eddfe016fdf3fc6/Cython-0.28.2-cp34-cp34m-manylinux1_x86_64.whl#sha256=85f7432776870d65639fed00f951a3c05ef1e534bc72a73cd1200d79b9a7d7d0 https://files.pythonhosted.org/packages/fc/1b/a1717502572587c724858862fd9b98a66105f3a3443225bda9a1bd16ee14/numpy-1.9.3-cp34-cp34m-manylinux1_x86_64.whl#sha256=bff36563f9d6a06a81ae232f49d2946c84c05e391a7dff057496033c79507860 https://files.pythonhosted.org/packages/02/64/c6c1c24ff4dbcd789fcfdb782e343ac23c074f6b8b03e818ff60eb0f937f/numpy-1.12.1-cp34-cp34m-manylinux1_x86_64.whl#sha256=4eac5f2f624c5e7eecbdb51395ff39a099c48cab607a158f16f288c6fe39a2b3 https://files.pythonhosted.org/packages/1b/ee/f65826b2880f67652c21326565b4c166c7cdb1019f84b82af65e625475cd/numpy-1.13.1-cp34-cp34m-manylinux1_x86_64.whl#sha256=838e48df3703c8747f355cd6386e0680b906a2f7b2bbd304e8a2d531692484ce:
  Double requirement given: numpy==1.12.1 from https://files.pythonhosted.org/packages/02/64/c6c1c24ff4dbcd789fcfdb782e343ac23c074f6b8b03e818ff60eb0f937f/numpy-1.12.1-cp34-cp34m-manylinux1_x86_64.whl#sha256=4eac5f2f624c5e7eecbdb51395ff39a099c48cab607a158f16f288c6fe39a2b3 (already in numpy==1.9.3 from https://files.pythonhosted.org/packages/fc/1b/a1717502572587c724858862fd9b98a66105f3a3443225bda9a1bd16ee14/numpy-1.9.3-cp34-cp34m-manylinux1_x86_64.whl#sha256=bff36563f9d6a06a81ae232f49d2946c84c05e391a7dff057496033c79507860, name='numpy')

numpy和pandas都是全局安装的，没有任何问题。我尝试重新安装numpy，升级pip3，重新安装设置工具。没有任何工作按预期进行，因为我甚至不理解错误信息。

Answer 1

发现这对我有用了：

Double requirement given when trying to use pip install pandas

http://stackoverflow.com/questions/49608953/double-requirement-given-when-trying-to-use-pip-install-pandas

Answer 2

不确定你的问题是什么。你应该从一开始就发布你所做的一切。你有没有激活你的virtualenv？如果您没有这样做，那么：

virtualenv venv
venv/bin/activate

Answer 3

我遇到了同样的问题！ [Ubuntu 16, python 3.5使用python3 -m venv .env创建虚拟环境后，无法在.env虚拟环境中安装熊猫。这是我解决的方法：

我的virtualenv的pip版本为pip-8.1.1.，我运行以下命令将其升级到pip-20.0.2：

pip install --upgrade pip

然后，运行pip install pandas以在我的虚拟环境中成功安装熊猫！

Successfully installed numpy-1.18.1 pandas-0.24.2 python-dateutil-2.8.1 pytz-2019.3 six-1.14.0

无法在venv

3 个答案: