code: def get_series_diff(series):
      r"""Perform the difference operation on a series.
  
      Parameters
      ----------
      series : pandas.Series
          The series for the ``diff`` operation.
  
      Returns
      -------
      new_series : pandas.Series
          The differenced series.
  
      """
      new_series = pd.Series(len(series))
      new_series = series.diff()
      new_series[0] = 0
      return new_series
  
imports: import warnings
  from alphapy.__main__ import main_pipeline
  from alphapy.frame import read_frame
  from alphapy.frame import write_frame
  from alphapy.globals import ModelType
  from alphapy.globals import Partition, datasets
  from alphapy.globals import PSEP, SSEP, USEP
  from alphapy.globals import WILDCARD
  from alphapy.model import get_model_config
  from alphapy.model import Model
  from alphapy.space import Space
  from alphapy.utilities import valid_date
  import argparse
  import datetime
  from itertools import groupby
  import logging
  import math
  import numpy
  import os
  import pandas
  import sys
  import yaml
label_desc: Use image node_id 7 for calling a global function with example usage: get_series_diff(series) and returns: new_series