code: def __iter__(self):
      warnings.warn(
          "Iterating over security_lists is deprecated. Use "
          "`for sid in <security_list>.current_securities(dt)` instead.",
          category=ZiplineDeprecationWarning,
          stacklevel=2,
      )
      return iter(self.current_securities(self.current_date()))
  
imports: import warnings
  from datetime import datetime
  from os import listdir
  import os.path
  import pandas
  import pytz
  import zipline
  from zipline.errors import SymbolNotFound
  from zipline.finance.asset_restrictions import SecurityListRestrictions
  from zipline.zipline_warnings import ZiplineDeprecationWarning
label_desc: Use image node_id 3 for calling the SecurityList obj's underlying member method code with example usage: obj.__iter__() and returns: iter