editor.py 文件源码

def ipython_cell_executed(self):
        user_ns = self.kernel.shell.user_ns
        ip_keys = set(['In', 'Out', '_', '__', '___',
                       '__builtin__',
                       '_dh', '_ih', '_oh', '_sh', '_i', '_ii', '_iii',
                       'exit', 'get_ipython', 'quit'])
        # '__builtins__', '__doc__', '__loader__', '__name__', '__package__', '__spec__',
        clean_ns_keys = set([k for k, v in user_ns.items() if not history_vars_pattern.match(k)]) - ip_keys
        clean_ns = {k: v for k, v in user_ns.items() if k in clean_ns_keys}

        # user_ns['_i'] is not updated yet (refers to the -2 item)
        # 'In' and '_ih' point to the same object (but '_ih' is supposed to be the non-overridden one)
        cur_input_num = len(user_ns['_ih']) - 1
        last_input = user_ns['_ih'][-1]
        if setitem_pattern.match(last_input):
            m = setitem_pattern.match(last_input)
            varname = m.group(1)
            # otherwise it should have failed at this point, but let us be sure
            if varname in clean_ns:
                if self._display_in_grid(varname, clean_ns[varname]):
                    # XXX: this completely refreshes the array, including detecting scientific & ndigits, which might
                    # not be what we want in this case
                    self.select_list_item(varname)
        else:
            # not setitem => assume expr or normal assignment
            if last_input in clean_ns:
                # the name exists in the session (variable)
                if self._display_in_grid('', self.data[last_input]):
                    # select and display it
                    self.select_list_item(last_input)
            else:
                # any statement can contain a call to a function which updates globals
                # this will select (or refresh) the "first" changed array
                self.update_mapping(clean_ns)

                # if the statement produced any output (probably because it is a simple expression), display it.

                # _oh and Out are supposed to be synonyms but "_ih" is supposed to be the non-overridden one.
                # It would be easier to use '_' instead but that refers to the last output, not the output of the
                # last command. Which means that if the last command did not produce any output, _ is not modified.
                cur_output = user_ns['_oh'].get(cur_input_num)
                if cur_output is not None:
                    if self._display_in_grid('_', cur_output):
                        self.view_expr(cur_output)

                    if isinstance(cur_output, matplotlib.axes.Subplot) and 'inline' not in matplotlib.get_backend():
                        show_figure(self, cur_output.figure)