import sqlite3

db = "paintingzz.db"

conn = sqlite3.connect(db)
cur = conn.cursor()

table = "inspections"

# Find completely NULL columns
cur.execute(f"PRAGMA table_info({table})")
columns = [row[1] for row in cur.fetchall()]

empty_columns = []

for col in columns:
    print('cucurucu')
    cur.execute(
        f'SELECT COUNT(*) FROM "{table}" WHERE "{col}" IS NOT NULL'
    )
    count = cur.fetchone()[0]

    if count <100 :
        print('list b growing')
        empty_columns.append(col)
        print(empty_columns)

print("Removing:", empty_columns)

# SQLite >= 3.35 supports DROP COLUMN
for col in empty_columns:
    cur.execute(
        f'ALTER TABLE "{table}" DROP COLUMN "{col}"'
    )

conn.commit()
conn.close()