code: def xlim(min, max):
      
      if not isinstance(min, (int, float, complex)):
          min = tplot_utilities.str_to_int(min)
      if not isinstance(max, (int, float, complex)):
          max = tplot_utilities.str_to_int(max)
      if 'x_range' in tplot_opt_glob:
          lim_info['xlast'] = tplot_opt_glob['x_range']
      else:
          lim_info['xfull'] = Range1d(min, max)
          lim_info['xlast'] = Range1d(min, max)
      tplot_opt_glob['x_range'] = [min, max]
      return
docs: This function will set the x axis range for all time series plots
      
      Parameters:
          min : flt
              The time to start all time series plots.  Can be given in seconds since epoch, or as a string
              in the format "YYYY-MM-DD HH:MM:SS"
          max : flt
              The time to end all time series plots.  Can be given in seconds since epoch, or as a string
              in the format "YYYY-MM-DD HH:MM:SS" 
              
      Returns:
          None
      
      Examples:
          >>> # Set the timespan to be 2017-07-17 00:00:00 plus 1 day
          >>> import pytplot
          >>> pytplot.xlim(1500249600, 1500249600 + 86400)
          
          >>> # The same as above, but using different inputs
          >>> pytplot.xlim("2017-07-17 00:00:00", "2017-07-18 00:00:00")