问如何检查是否已在.csv文件中填充日期项

EN

import csv
import datetime
import os

file_name = "results.csv"

modified = datetime.date.fromtimestamp(os.path.getmtime(file_name))

if (modified < datetime.date.today()):
    with open(file_name, mode='a') as csv_file:
        writer = csv.writer(csv_file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
        writer.writerow([date.today(),mainstream_count,specialist_count])

import time
import pathlib
import csv

file_path = pathlib.Path('results.csv')
modification_time = file_path.stat().st_mtime
current_time = time.time()

# Only write if it wasn't modified in the last 8 hours.
if current_time - modification_time > 60 * 60 * 8:
    with open(file_path.name, mode='a') as csv_file:
        writer = csv.writer(
            csv_file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL
        )
        writer.writerow([date.today(),mainstream_count,specialist_count])

def recently_updated(file_path, hours):
    if not file_path.exists():
        return False
    mtime = file_path.stat().st_mtime
    return time.time() - mtime < 60 * 60 * hours

...

if not recently_updated(file_path, hours=8):
    with ...