Upon logging to a Linux host, I observe that the command prompt contains (base), e.g,
(base) user@host ~] $
Variable PS1 has the value of (base) [\u@\h \W]\$
(base) [user@host ~] $ echo $PS1
(base) [\u@\h \W]\$
This is because we had Anaconda installed and Anaconda is showing which virtual environment we are in. To get rid of this, we can deactivate this by
conda config --set auto_activate_base false
I wanted to install python package pygraphiz on Windows. However, I encountered an error, as shown below,
C:> python -m pip install pygraphviz
python -m pip install pygraphviz
Collecting pygraphviz
Using cached pygraphviz-1.8.zip (119 kB)
Preparing metadata (setup.py) ... done
Building wheels for collected packages: pygraphviz
Building wheel for pygraphviz (setup.py) ... error
ERROR: Command errored out with exit status 1:
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pygraphviz/graphviz_wrap.c(2711): fatal error C1083: Cannot open include file: 'graphviz/cgraph.h': No such file or directory
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Clearly, the problem is that pip cannot locate the graphviz's header files. Given that I have already installed Graphviz, I reran the pip command as follows, and it solved the problem.
set GRAPHVIZPATH=C:\Applications\Graphviz\Graphviz2.50
python -m pip install --global-option=build_ext --global-option="-I%GRAPHVIZPATH%\include" --global-option="-L%GRAPHVIZPATH%\lib" pygraphviz
In the above, we provide pip with the location of the include files and the library files. Note that it shows that I had graphviz installed at C:\Applications\Graphviz\Graphviz2.50, which should be adjusted according to your set up.