.. _spkg_backcall: backcall: Specifications for callback functions =============================================== Description ----------- Specifications for callback functions passed in to an API Type ---- standard Version Information ------------------- package-version.txt:: 0.1.0 install-requires.txt:: backcall >=0.1.0 Equivalent System Packages -------------------------- conda: .. CODE-BLOCK:: bash $ conda install python:backcall See https://repology.org/project/python:backcall/versions However, these system packages will not be used for building Sage because using Python site-packages is not supported by the Sage distribution; see https://trac.sagemath.org/ticket/29023