Sometimes unexpected things happen.
In this case, please, open an Issue and make sure to include the version of Hydrogen and Atom you are running. You can get this information by running
atom --version from the command line.
Please, also include the output or a screenshot of the debug messages. To access the debug messages follow these steps:
Open the Settings tab by pressing (
ctrl-,), select the Hydrogen package (
Packages --> Hydrogen), and tick
Enable Debug Messages:
Open the developer tools (
View --> Developer --> Toggle Developer Toolsor via
Select the Console tab to see the debug logs and run the code causing the issue:
Installation fails on Linux 32-bit
At the moment we don't ship prebuilts for 32-bit Linux. Hence you'll need some additional toolling to build from source:
v3.x.xis not supported for building Hydrogen)
- A proper C/C++ compiler toolchain, like GCC
Use your distribution's package manager to install.
If your default
python is 3.x, you need to run instead
PYTHON=python2.7 apm install hydrogen or change the default version for
apm config set python $(which python2.7) beforehand. You can still use 3.x versions of Python in Hydrogen, but it will only build with 2.x due to a longstanding issue with
No kernel for grammar XXX found
Hydrogen requires a Kernel to run code. Checkout nteract.io/kernels for instructions on how to install the most popular kernels.
Atom won't pick up kernels inside a virtualenv unless Atom is launched as
atom . within the virtualenv. The alternative is to create a kernel specifically for a virtualenv.
No kernel for grammar
Python found error on Mac OS
First off, make sure that you run
python3 -m pip install ipykernel python3 -m ipykernel install --user
shows IPython kernels you want to use.
Even after the above steps have been done successfully, if Hydrogen still keeps complaining the "No kernel for grammar
Python found" error on Mac OS, this workaround may help you solve it.
Hydrogen doesn't show my results.
Again, there are a number of possible causes and solutions:
- solved by upgrading the
jupyterversion (see this comment );
- solved by upgrading the
If Hydrogen doesn't output any results for Atom version < 1.13 (see issue #326), check that you haven't disabled
Use Shadow DOMunder
Settings > Editor. This option should be enabled.
Hydrogen stopped working after updating Atom
Whenever your Atom is upgraded, the Hydrogen package needs to be rebuilt. Atom should prompt you to rebuild Hydrogen after upgrading. In case it doesn't, you can manually rebuild Hydrogen from the Panel that opens when executing
Incompatible Packages: Viewvia the command palette.
You can also access this Panel by clicking on the tiny red bug icon at the bottom right of Atom.
In case the Atom GUI
Rebuild Packagesbutton doesn't work, you can try running
apm rebuild hydrogen(to rebuild) or
apm install hydrogen(to reinstall) in the package directory then restarting Atom to resolve.
Setting environment variables on Windows
Hydrogen fails to import modules:
If hydrogen works for standard libraries but you encounter
ModuleNotFoundError: No module named 'your_package' for custom installed packages, check that the path of the kernel you are using is the one specified in the windows
PATH. Especially when using virtual environments like
anaconda ensure that the corresponding python executables are set in the windows path.
To add the path, enter
where python in the windows command line and chose the apporiate entry. Then, add it manually to the windows
PATH, similarly as detailed below for the standard python path.
Hydrogen does not recognize python:
On Windows if Python is not added to your environment variables, Hydrogen won't be able to locate your Python installations (
No kernel specs found).
To solve this problem you need to add Python to your systems environment variables. This can be done in 2 ways:
- During Python installation
- Manually adding in the Environment variables
During Python installation:
While installing Python check Add Python to environment variables. It will do the rest of work for you!
If you already have Python installed then you may not need to uninstall it just follow the steps:
- Go to the Uninstall or Change a Program Menu
- Select your Python version
- Click on the Uninstall/Change button
- Select Modify from the appeared menu
- Click on Next
- Check mark Add python to environment variables
- And finish the installation process
Manually adding Python to Environment variables:
You can also add Python to the environment variables manually
- In Control Panel search for environment variables
- Click on Edit system environment variables
- Click on Environment variables
- From the System variables tab select Path and click on Edit
- Click on New and add
- Click on New again and add
- Click on OK to finish, now your problem is fixed!
You should see something like this,