输入实例地址，tag名称，下载相应tag下的所有图片。

download_mastodon_timeline_tag_picture.py

#!/usr/bin/env python
# coding: utf-8

import requests
import os

def request_status_list(instance_uri, tag_name, max_id=None):
    api_endpoint = '/api/v1/timelines/tag/'
    uri = instance_uri + api_endpoint + tag_name

    if max_id:
        parame = {'max_id':max_id}
        resp = requests.get(uri,params=parame)
    else:
        resp = requests.get(uri)
    status_list = resp.json()
    return status_list

def handle_status(status_list):
    result_list = []
    num = 0
    min_id = status_list[0]['id']
    for status in status_list:
        if status['id'] < min_id:
            min_id = status['id']
        else:
            pass
        
        result = {}
        result['id'] = status['id']
        result['author'] = status['account']['username']
        result['created_at'] = status['created_at']
        result['media_uri_list'] = []
        
        media_attachments = status['media_attachments']
        for media_attachment in media_attachments:
            result['media_uri_list'].append(media_attachment['url'].split('?')[0])

        if result['media_uri_list']:
            result_list.append(result)
        else:
            pass
        num = num + 1
    return result_list,min_id,num

def download_image(result):
    filename_list = []
    for media_uri in result['media_uri_list']:
        filename = result['created_at'].split('T')[0] + '-' + result['author'] + '-' + result['id'] + '-' + os.path.split(media_uri)[-1]
        r = requests.get(media_uri)
        with open(filename,'wb') as f:
            f.write(r.content)
        filename_list.append(filename)
    return filename_list

if __name__ == '__main__':

    instance_uri = 'https://cmx.social'
    tag_name = '中午吃啥'

    globe_result_list = []
    max_id = None
    while True:
        status_list = request_status_list(instance_uri,tag_name,max_id)
        tmp_result_list,min_id,num = handle_status(status_list)
        globe_result_list.extend(tmp_result_list)
        max_id = min_id
        if num != 20:
            break

    for result in globe_result_list:
        download_image(result)