Function import_submodule

IPython/lib/deepreload.py:164–191

m = import_submodule(mod, subname, fullname)

(mod, subname, fullname)

found_now = {}

def import_submodule(mod, subname, fullname):
    """m = import_submodule(mod, subname, fullname)"""
    # Require:
    # if mod == None: subname == fullname
    # else: mod.__name__ + "." + subname == fullname

    global found_now
    if fullname in found_now and fullname in sys.modules:
        m = sys.modules[fullname]
    else:
        print('Reloading', fullname)
        found_now[fullname] = 1
        oldm = sys.modules.get(fullname, None)
        try:
            if oldm is not None:
                m = importlib.reload(oldm)
            else:
                m = importlib.import_module(subname, mod)
        except:
            # load_module probably removed name from modules because of
            # the error.  Put back the original module object.
            if oldm:
                sys.modules[fullname] = oldm
            raise

        add_submodule(mod, m, fullname, subname)

    return m

def add_submodule(mod, submod, fullname, subname):
    """mod.{subname} = submod"""