fix: use r in front of strings with escape seqs

Python 3.12 emits warnings

Author: Markus Tauchnitz

athenacli/completer.py

@@ -28,7 +28,7 @@ def __init__(self, smart_completion=True, supported_formats=(), keyword_casing='
         self.reserved_words = set()
         for x in self.keywords:
             self.reserved_words.update(x.split())
-        self.name_pattern = compile("^[_a-z][_a-z0-9\$]*$")
+        self.name_pattern = compile(r"^[_a-z][_a-z0-9\$]*$")
 
         self.special_commands = []
         self.table_formats = supported_formats

athenacli/main.py

@@ -204,7 +204,7 @@ def connect(self, aws_config, database):
         )
 
     def handle_editor_command(self, text):
-        """
+        r"""
         Editor command is any query that is prefixed or suffixed
         by a '\e'. The reason for a while loop is because a user
         might edit a query multiple times.

athenacli/packages/parseutils.py

@@ -15,7 +15,7 @@
         }
 
 def last_word(text, include='alphanum_underscore'):
-    """
+    r"""
     Find the last word in a sentence.
     >>> last_word('abc')
     'abc'

athenacli/packages/special/iocommands.py

@@ -117,7 +117,7 @@ def get_editor_query(sql):
     # The reason we can't simply do .strip('\e') is that it strips characters,
     # not a substring. So it'll strip "e" in the end of the sql also!
     # Ex: "select * from style\e" -> "select * from styl".
-    pattern = re.compile('(^\\\e|\\\e$)')
+    pattern = re.compile(r'(^\\\e|\\\e$)')
     while pattern.search(sql):
         sql = pattern.sub('', sql)
 
@@ -213,7 +213,7 @@ def subst_favorite_query_args(query, args):
 
         query = query.replace(subst_var, val)
 
-    match = re.search('\\$\d+', query)
+    match = re.search(r'\\$\d+', query)
     if match:
         return[None, 'missing substitution for ' + match.group(0) + ' in query:\n  ' + query]