code: def is_sorted_ascending(a):
      """Check if a numpy array is sorted."""
      return (np.fmax.accumulate(a) <= a).all()
  
file_path: zipline/zipline/pipeline/loaders/utils.py
imports: import numpy
  import pandas
  from zipline.errors import NoFurtherDataError
  from zipline.pipeline.common import TS_FIELD_NAME, SID_FIELD_NAME
  from zipline.utils.numpy_utils import categorical_dtype
label_desc: Use image node_id 1 for calling a global function with example usage: is_sorted_ascending(a) and returns: unknown