istore.py

from IPython.core import ipapi

def istore():
    '''Extracts all variable names used in assignments from the input history
    and stores them.'''
    ipy = ipapi.get()
    for v in assignees(assignments(ipy.history_manager.input_hist_raw)):
        try:
            ipy.magic('store %s' % v)
        except:
            pass

def assignments(hist):
    return (h for h in hist if '=' in h)

def assignees(assignments):
    return (a.split('=')[0].strip() for a in assignments)