diff --git a/parse.py b/parse.py
index 85c2700..2ebe369 100755
--- a/parse.py
+++ b/parse.py
@@ -1,4 +1,5 @@
 #!/usr/bin/python3
+"""Convert from wiki page schedule to XML schedule."""
 
 import hashlib
 import re
@@ -24,9 +25,7 @@ re_day_heading = re.compile(
 )
 
 re_time = re.compile(r"^\| ?(\d{2}):(\d{2})")
-url = "https://meta.wikimedia.org/wiki/GLAM_Wiki_2023/Program/The_CC_Certificate_for_GLAM:_learn_about_it_by_becoming_part_of_a_human_sculpture_collection"
 
-# re_session = re.compile(r'\| colspan="\d+" rowspan="\d+" \|\[\[(.*)\|(.*)\]\]')
 re_session = re.compile(r'\| (?:colspan="\d+" )?rowspan="(\d+)" \|(.*)')
 re_colspan = re.compile(r'\| colspan="(\d+)')
 
@@ -46,16 +45,6 @@ class Session(typing.TypedDict):
 GroupedSlots = dict[int, dict[str, list[Session]]]
 
 
-def content_to_url(s: str) -> str:
-    try:
-        assert s.startswith("[[GLAM")
-    except AssertionError:
-        print(s)
-        raise
-    page_title = urllib.parse.quote(s.partition("|")[0][2:].replace(" ", "_"))
-    return "https://meta.wikimedia.org/wiki/" + page_title
-
-
 meta = [
     ("title", "GLAM Wiki 2023"),
     ("subtitle", "Galleries, Libraries, Archives, Museums, etc."),
@@ -79,12 +68,20 @@ rooms = [
 ]
 
 
+def content_to_url(s: str) -> str:
+    """Convert wiki link to URL."""
+    assert s.startswith("[[GLAM")
+    page_title = urllib.parse.quote(s.partition("|")[0][2:].replace(" ", "_"))
+    return "https://meta.wikimedia.org/wiki/" + page_title
+
+
 def minutes_to_duration(mins: int) -> str:
     """Convert minutes to duration string."""
     return f"{mins // 60:02d}:{mins % 60:02d}"
 
 
 def build_event(item: Session, room: lxml.etree._Element) -> None:
+    """Build an event."""
     global event_id
     """Build an event element."""
     if item["name"][0] != "[" or item["name"].startswith("[[Event:"):
@@ -115,6 +112,7 @@ def build_event(item: Session, room: lxml.etree._Element) -> None:
 
 
 def read_wikitext(filename: str) -> GroupedSlots:
+    """Parse schedule wiki page."""
     group_by_day_and_room: GroupedSlots = {
         index: {room: [] for room in rooms} for index in range(1, 5)
     }
@@ -163,7 +161,6 @@ def read_wikitext(filename: str) -> GroupedSlots:
                 t = time(int(m.group(1)), int(m.group(2)))
                 start_time = t
                 col = 1
-                # print("time: ", t)
             expect = "session"
             continue
         if expect == "session" and line == "|\n":