Fix empty docstrings

drip/drips.py

@@ -99,10 +99,14 @@ class DripBaseParamsOptions(TypedDict):
 
 
 class DripMessage(object):
-    """[summary]
+    """
+    Email message abstraction for manage message interactions, based on EmailMultiAlternatives.
+    You can extend this manually overriding any method that you need.
 
-    :param object: [description]
-    :type object: [type]
+    :param drip_base: DripBase object to build email
+    :type drip_base: DripBase
+    :param user: User to send email
+    :type user: User
     """
 
     # Ignoring this line because mypy says User is not a valid type

drip/helpers.py

@@ -19,7 +19,10 @@ def process_regex(matches: Match[str]) -> Dict[str, Union[str, int]]:
 
 
 def get_flexible_regex(string: str) -> Dict[str, Union[str, int]]:
-    # This is the more flexible format
+    """
+    Matches a string using a more flexible regex expression for parsing
+    it to timedelta object.
+    """
     matches = re.match(
         r"^((?P<weeks>-?((\d*\.\d+)|\d+))\W*w((ee)?(k(s)?)?)(,)?\W*)?"
         r"((?P<days>-?((\d*\.\d+)|\d+))\W*d(ay(s)?)?(,)?\W*)?"
@@ -35,8 +38,11 @@ def get_flexible_regex(string: str) -> Dict[str, Union[str, int]]:
 
 
 def process_string(string: str) -> datetime.timedelta:
-    # This is the format we get from sometimes Postgres, sqlite,
-    # and from serialization
+    """
+    Process a string into a timedelta object, using a standard format used by
+    Postgres, sqlite, or from serialization. Or a flexible regex expression
+    if the standard form is not enough.
+    """
     matches = re.match(
         r"^((?P<days>[-+]?\d+) days?,? )?(?P<sign>[-+]?)(?P<hours>\d+):"
         r"(?P<minutes>\d+)(:(?P<seconds>\d+(\.\d+)?))?$",