How to install pydot and graphviz?

Im running a code that needs pydot and graphviz. I am using python 3.5 and ubuntu 16.04 LTS 64 bit.

  File "/usr/local/lib/python3.5/dist-packages/keras/utils/vis_utils.py", line 17, in _check_pydot
    raise ImportError('Failed to import pydot. You must install pydot'
ImportError: Failed to import pydot. You must install pydot and graphviz for `pydotprint` to work.

I googled a little then found that I can install pydot with the code pip install pydot. But I know get this error. I am noob in ubuntu and I dont understand what to do. so how do I install pydot ?

deeplearning@deep-learning-virtual-machine:~$ pip install pydot
Collecting pydot
Collecting pyparsing>=2.1.4 (from pydot)
  Using cached pyparsing-2.2.0-py2.py3-none-any.whl
Installing collected packages: pyparsing, pydot
  Found existing installation: pyparsing 2.0.3
    Uninstalling pyparsing-2.0.3:
Exception:
Traceback (most recent call last):
  File "/usr/lib/python3.5/shutil.py", line 538, in move
    os.rename(src, real_dst)
PermissionError: [Errno 13] Permission denied: '/usr/lib/python3/dist-packages/__pycache__/pyparsing.cpython-35.pyc' -> '/tmp/pip-45miiuxw-uninstall/usr/lib/python3/dist-packages/__pycache__/pyparsing.cpython-35.pyc'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/local/lib/python3.5/dist-packages/pip/commands/install.py", line 342, in run
    prefix=options.prefix_path,
  File "/usr/local/lib/python3.5/dist-packages/pip/req/req_set.py", line 778, in install
    requirement.uninstall(auto_confirm=True)
  File "/usr/local/lib/python3.5/dist-packages/pip/req/req_install.py", line 754, in uninstall
    paths_to_remove.remove(auto_confirm)
  File "/usr/local/lib/python3.5/dist-packages/pip/req/req_uninstall.py", line 115, in remove
    renames(path, new_path)
  File "/usr/local/lib/python3.5/dist-packages/pip/utils/__init__.py", line 267, in renames
    shutil.move(old, new)
  File "/usr/lib/python3.5/shutil.py", line 553, in move
    os.unlink(src)
PermissionError: [Errno 13] Permission denied: '/usr/lib/python3/dist-packages/__pycache__/pyparsing.cpython-35.pyc'

Solution 1:

python-pydot and graphviz are in the default Ubuntu repositories in all currently supported versions of Ubuntu. In all currently supported versions of Ubuntu, open the terminal and type:

sudo apt install python-pydot python-pydot-ng graphviz # python-pydot-ng isn't in the 14.04 repos

This flowchart was created with graphviz in Ubuntu. Because graphviz uses the built-in dot programming language which is included in the graphviz package, the source code of the linked flowchart is editable in any text editor even if python-pydot is not installed.

I don't know why you would want to install pydot with pip when you can get it from the Ubuntu repositories, but to answer your question I tried installing pydot anyway in a Python virtual environment with pip3 install pydot and it worked, so it is possible that you need to update pip to the latest version with sudo -H pip3 install --upgrade pip. I used pip3 instead of pip because you wrote in your question that you are using Python 3.5.

Solution 2:

From this answer on "Installing pydot and graphviz packages in Anaconda environment"

I had the same issue and solved it by (order is important):

1. Installing graphviz, simply via sudo apt-get install graphviz
2. Installing graphviz for Python via conda sudo ~/anaconda2/bin/conda install graphviz
3. Finally, by installing pydot using conda sudo ~/anaconda2/bin/conda install pydot

This answer is overdue but this post helped me (together with this one that mentions the installation order), so hopefully this answer will help someone else. I'm using Ubuntu 14.04 and Python 2.7.

P.S. apparently, there could be some issues with step 1 of the above algorithm, this post mentions how to fix them.