Python 安装后无法导入keras
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Cannot import keras after installation
提问by nabroyan
I'm trying to setup kerasdeep learning library for Python3.5on Ubuntu 16.04 LTS and use Tensorflowas a backend. I have Python2.7and Python3.5installed. I have installed Anacondaand with help of it Tensorflow, numpy, scipy, pyyaml. Afterwards I have installed keraswith command
我正在尝试在 Ubuntu 16.04 LTS 上设置keras深度学习库Python3.5并Tensorflow用作后端。我有Python2.7并Python3.5安装。我已经安装Anaconda并在它的帮助下 Tensorflow，numpy, scipy, pyyaml. 之后我keras用命令安装
sudo python setup.py install
须藤 python setup.py 安装
Although I can see /usr/local/lib/python3.5/dist-packages/Keras-1.1.0-py3.5.eggdirectory, I cannot use keraslibrary. When I try to import it in python it says
虽然我可以看到/usr/local/lib/python3.5/dist-packages/Keras-1.1.0-py3.5.egg目录，但我不能使用keras库。当我尝试在 python 中导入它时，它说
ImportError: No module named 'keras'
导入错误：没有名为“keras”的模块
I have tried to install kerasusingpip3, but got the same result.
我曾试图安装keras使用pip3，但得到了同样的结果。
What am I doing wrong? Any Ideas?
我究竟做错了什么？有任何想法吗？
采纳答案by Laurent LAPORTE
Diagnose
诊断
If you have pipinstalled (you should have it until you use Python 3.5), list the installed Python packages, like this:
如果您已经pip安装（在使用 Python 3.5 之前应该安装它），列出已安装的 Python 包，如下所示：
$ pip list | grep -i keras
Keras (1.1.0)
If you don't see Keras, it means that the previous installation failed or is incomplete (this lib has this dependancies: numpy (1.11.2), PyYAML (3.12), scipy (0.18.1), six (1.10.0), and Theano (0.8.2).)
如果没有看到Keras，说明之前的安装失败或者不完整（这个lib有这个依赖：numpy (1.11.2), PyYAML (3.12), scipy (0.18.1), Six (1.10.0) , 和 Theano (0.8.2).)
Consult the pip.logto see what's wrong.
咨询pip.log看看有什么问题。
You can also display your Python path like this:
您还可以像这样显示您的 Python 路径：
$ python3 -c 'import sys, pprint; pprint.pprint(sys.path)'
['',
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python35.zip',
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5',
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/plat-darwin',
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/lib-dynload',
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages']
Make sure the Keras library appears in the /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packagespath (the path is different on Ubuntu).
确保 Keras 库出现在/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages路径中（Ubuntu 上的路径不同）。
If not, try do uninstall it, and retry installation:
如果没有，请尝试卸载它，然后重试安装：
$ pip uninstall Keras
Use a virtualenv
使用虚拟环境
It's a bad idea to use and pollute your system-wide Python. I recommend using a virtualenv (see this guide).
使用和污染系统范围的 Python 是一个坏主意。我建议使用 virtualenv（请参阅本指南）。
The best usage is to create a virtualenvdirectory (in your home, for instance), and store your virtualenvs in:
最好的用法是创建一个virtualenv目录（例如在您的家中），并将您的 virtualenv 存储在：
cd virtualenv/
virtualenv -p python3.5 py-keras
source py-keras/bin/activate
pip install -q -U pip setuptools wheel
Then install Keras:
然后安装 Keras：
pip install keras
You get:
你得到：
$ pip list
Keras (1.1.0)
numpy (1.11.2)
pip (8.1.2)
PyYAML (3.12)
scipy (0.18.1)
setuptools (28.3.0)
six (1.10.0)
Theano (0.8.2)
wheel (0.30.0a0)
But, you also need to install extra libraries, like Tensorflow:
但是，您还需要安装额外的库，例如 Tensorflow：
$ python -c "import keras"
Using TensorFlow backend.
Traceback (most recent call last):
...
ImportError: No module named 'tensorflow'
The installation guide of TesnsorFlow is here: https://www.tensorflow.org/versions/r0.11/get_started/os_setup.html#pip-installation
TesnsorFlow的安装指南在这里：https://www.tensorflow.org/versions/r0.11/get_started/os_setup.html#pip-installation
回答by Beltino Goncalves
Ran to the same issue, Assuming your using anaconda3 and your using a venvwith >= python=3.6:
遇到同样的问题，假设您使用 anaconda3 并使用venvwith >= python=3.6：
python -m pip install keras
sudo python -m pip install --user tensorflow
回答by angelo.mastro
I had pipreferring by default to pip3, which made me download the libs for python3. On the contrary I launched the shell as python(which opened python 2) and the library wasn't installed there obviously.
我pip默认指的是 pip3，这让我下载了 python3 的库。相反，我将 shell 启动为python（打开了 python 2）并且显然没有安装库。
Once I matched the names pip3 -> python3, pip -> python (2) all worked.
一旦我匹配了名称 pip3 -> python3, pip -> python (2) 一切正常。
回答by AAKANKSHA JAIN
Firstly checked the list of installed Python packages by:
首先通过以下方式检查已安装的 Python 包列表：
pip list | grep -i keras
点子列表| grep -i keras
If there is keras shown then install it by:
如果显示 keras，则通过以下方式安装它：
pip install keras --upgrade --log ./pip-keras.log
pip install keras --upgrade --log ./pip-keras.log
now check the log, if there is any pending dependencies are present, it will affect your installation. So remove dependencies and then again install it.
现在检查日志，如果存在任何挂起的依赖项，它将影响您的安装。所以删除依赖项，然后再次安装它。
