How can I reload objects in my namespace in ipython

Python 2:

reload(module)

Python 3:

from importlib import reload
reload(module)

Where module is the file with your functions.

Use the following link to read more about reload built-in function. Please find sample below:

import controls.grid
reload(controls.grid)

Note that reload is 'Reload a previously imported module. The argument must be a module object, so it must have been successfully imported before.' and 'When a module is reloaded, its dictionary (containing the module’s global variables) is retained. Redefinitions of names will override the old definitions, so this is generally not a problem. If the new version of a module does not define a name that was defined by the old version, the old definition remains.'

you can also use autoreload, so that the modules you are working on are automatically reloaded at each statement, pretty handy for debugging, see:

Autoreload of modules in IPython