fix: add missing imports to resolve flake8 F821 errors

Author: petermr

corpus_module/corpus.py

@@ -7,6 +7,8 @@
 from typing import List, Dict, Optional, Any, Union
 from collections import defaultdict
 import json
+import lxml.etree as ET
+from corpus_module.query import CorpusQuery
 
 logger = logging.getLogger(__name__)
 

corpus_module/search.py

@@ -92,7 +92,7 @@ def search_paras_with_id_and_create_dict(cls, all_hits_dict: Dict, infile: Union
         assert infile_path.exists(), f"{infile} does not exist"
 
         try:
-            html_tree = lxml.etree.parse(str(infile), HTMLParser())
+            html_tree = ET.parse(str(infile), HTMLParser())
         except Exception as e:
             logger.error(f"Error parsing {infile}: {e}")
             return []

pygetpapers/extensions.py

@@ -1,4 +1,8 @@
 
+import configparser
+import logging
+
+logger = logging.getLogger(__name__)
 
 class ConfigReader():
     """