Tab indentation in Jupyter Notebook

There's some documentation on how to change the default number of spaces with indentUnit

IPython.Cell.options_default.cm_config.indentUnit = 2;

To use tabs (which is the formatting standard in Go for example) the relevant setting is exposed through the custom.js file, e.g. in

• ~/.ipython/profile_default/static/custom/custom.js
• ~/.ipython/profile_julia/static/custom/custom.js

Through adding:

CodeMirror.defaults.indentWithTabs=true;

The relevant Javascript run to access it is in codemirror.js (as of Jupyter v.4.0.6):

if (cm.options.indentWithTabs)
  for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
if (pos < indentation) indentString += spaceStr(indentation - pos);

i.e. it approaches indentation in steps of tabSize through addition/removal of string indentString, "\t"

This will probably not be that useful for Go, since it's compiled and the IPy/Jupyter kernel developers have accordingly stopped work on it.