code: def ts_short(daily_univariate_ts):
      return daily_univariate_ts.head(100)
  
imports: import datetime
  import itertools
  import numpy
  import pandas
  import pytest
  from prophet import Prophet, diagnostics
label_desc: Use image node_id 1 for calling a global function with example usage: ts_short(daily_univariate_ts) and returns: daily_univariate_ts