Method rerun

IPython/core/magics/history.py:311–361

Re-run previous input By default, you can specify ranges of input history to be repeated (as with %history). With no arguments, it will repeat the last line. Options: -l : Repeat the last n lines of input, not including the current command.

(self, parameter_s='')

    @line_magic
    def rerun(self, parameter_s=''):
        """Re-run previous input

        By default, you can specify ranges of input history to be repeated
        (as with %history). With no arguments, it will repeat the last line.

        Options:

          -l <n> : Repeat the last n lines of input, not including the
          current command.

          -g foo : Repeat the most recent line which contains foo
        """
        opts, args = self.parse_options(parameter_s, 'l:g:', mode='string')
        if "l" in opts:         # Last n lines
            try:
                n = int(opts["l"])
            except ValueError:
                print("Number of lines must be an integer")
                return

            if n == 0:
                print("Requested 0 last lines - nothing to run")
                return
            elif n < 0:
                print("Number of lines to rerun cannot be negative")
                return

            hist = self.shell.history_manager.get_tail(n)
        elif "g" in opts:       # Search
            p = "*"+opts['g']+"*"
            hist = list(self.shell.history_manager.search(p))
            for l in reversed(hist):
                if "rerun" not in l[2]:
                    hist = [l]     # The last match which isn't a %rerun
                    break
            else:
                hist = []          # No matches except %rerun
        elif args:              # Specify history ranges
            hist = self.shell.history_manager.get_range_by_str(args)
        else:                   # Last line
            hist = self.shell.history_manager.get_tail(1)
        hist = [x[2] for x in hist]
        if not hist:
            print("No lines in history match specification")
            return
        histlines = "\n".join(hist)
        print("=== Executing: ===")
        print(histlines)
        print("=== Output: ===")
        self.shell.run_cell("\n".join(hist), store_history=False)