[doc] Add the bug fix information for ipython user #254
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After the installation by following README, we will get an unwanted error regarding
ipython
.Basically, we will not be able to use ipython by NoModuleFoundError at all, because we change the base conda setting.
The command that yields the error is
conda install gxx_linux-64 gcc_linux-64 swig
and this can be fixed byunset _CONDA_PYTHON_SYSCONFIGDATA_NAME
.The unset command unsets the environment variable.
You can reproduce this issue by the followings: