Downloads all posts from instagram in specific date range

file.py

import csv
from datetime import datetime

from instaloader import instaloader


def instaposts_streamer(query, date_from, date_to, filename):
    cols = ['date', 'username', 'text', 'tags', 'permalink']
    with open(filename, 'w') as f:
        csv.writer(f, delimiter='|').writerow(cols)

    L = instaloader.Instaloader()

    posts = L.get_hashtag_posts(query)

    SINCE = datetime.strptime(date_to, '%Y-%m-%d')
    UNTIL = datetime.strptime(date_from, '%Y-%m-%d')
    print("SINCE", SINCE)
    print("UNTIL", UNTIL)

    psts = []

    for post in filter(lambda p: SINCE <= p.date <= UNTIL, posts):

        if post.caption is None:
            pst = [post.date, post.owner_username, post.caption, post.caption_hashtags,
                   'instagram.com/p/' + post.shortcode + '/']
        else:
            pst = [post.date, post.owner_username, post.caption.replace('\n', '\\n'), post.caption_hashtags,
                   'instagram.com/p/' + post.shortcode + '/']
        print(post.date)
        psts.append(pst)
        with open(filename, 'a') as f:
            csv.writer(f, delimiter='|').writerow(pst)


query = 'onlinebusiness'
date_from = '2020-04-20'
date_to = '2020-04-14'
filename = 'testinst2.csv'

res = instaposts_streamer(query, date_from, date_to, filename)