Calendar import failed

Change Calendar could not read the calendar file. Re-export the source calendar and try again or troubleshoot issues  with .ics files.

pip install icalendar

from icalendar import Calendar
from datetime import date

def filter_ics(input_file, output_file, start_date, end_date):
    # 入力ファイルを読み込む
    with open(input_file, 'rb') as f:
        cal = Calendar.from_ical(f.read())

    # 新しいカレンダーを作成し、元のカレンダーのプロパティをコピー
    new_cal = Calendar()
    for attr, value in cal.items():
        new_cal.add(attr, value)

    # イベントをフィルタリング
    for component in cal.walk():
        if component.name == "VEVENT":
            event_start = component.get('dtstart').dt
            if (start_date <= event_start <= end_date and
                '祭日' not in str(component.get('description', ''))):
                new_cal.add_component(component)

    # 新しいICSファイルを書き出す
    with open(output_file, 'wb') as f:
        f.write(new_cal.to_ical())

# 使用例
input_file = 'basic.ics'  # 入力ファイル名
output_file = 'output.ics'  # 出力ファイル名
start_date = date(2024, 1, 1)  # 開始日
end_date = date(2027, 12, 31)  # 終了日

filter_ics(input_file, output_file, start_date, end_date)
print(f"Filtered events from {start_date} to {end_date} have been saved to {output_file}")