Adjust wikidata event specifiers

Do minor refactors:
- Swap fmt=1 and fmt=2 in 'events' table
- Make documentation consistently use BC and AD
- import argparse at start of scripts

1 files changed, 4 insertions, 3 deletions

diff --git a/backend/hist_data/reduce_event_data.py b/backend/hist_data/reduce_event_data.py
index c061f90..5801f4d 100755
--- a/backend/hist_data/reduce_event_data.py
+++ b/backend/hist_data/reduce_event_data.py
@@ -1,16 +1,17 @@
 #!/usr/bin/python3
 
 """
-Delete events from the database that have no image.
+Delete events from the database that have no image
 """
 
-# Enable unit testing code to, when running this script, resolve imports of modules within this directory
+# Code used in unit testing (for resolving imports of modules within this directory)
 import os, sys
 parentDir = os.path.dirname(os.path.realpath(__file__))
 sys.path.append(parentDir)
-
+# Standard imports
 import argparse
 import sqlite3
+# Local imports
 from cal import SCALES, dbDateToHistDate, dateToUnit
 
 DB_FILE = 'data.db'