Dumb e621 parser

import http.client
import json
import os

from random import randint
from time import sleep

def preppost(post):
    post['src_id'] = post['id']
    post['timestamp'] = post['created_at']['s']
    post['tags'] = post['tags'].split(' ')
    post['description'] = post['description'].strip()

    # Sweet Luna, why do I even have to write what comes next?? >__<
    if('sources' in post): post['sources'] = list(map(str.strip, post['sources']))
    elif('source' in post):
        post['sources'] = []
        if(type(post['source']) is str and post['source'].strip != ''): post['sources'].append(post['source'])

    # Cleaning up some unnesessary trash
    del(
        post['author'],
        post['change'],
        post['children'],
        post['creator_id'],
        post['fav_count'],
        post['has_children'],
        post['has_comments'],
        post['has_notes'],
        post['parent_id'],
        post['preview_height'],
        post['preview_width'],
        post['preview_url'],
        post['sample_height'],
        post['sample_width'],
        post['sample_url'],
        post['id'],
        post['created_at'],
        post['source']
    )

    return post

def getposts(page):
    connection.request('GET', '/post/index.json?limit=50&page='+str(page), headers={
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0'
    })

    # Because sometimes shit happens, duh
    result = None
    sleeptime = 0
    while(result is None):
        try: result = json.loads(connection.getresponse().read().decode('utf-8'))
        except:
            # Yes, we increase waiting time on every error because reasons
            sleeptime += 60
            print("Error, waiting %s seconds", (str(sleeptime)))
            sleep(sleeptime)

    return result

def writejson(data, filename):
    if(os.path.isfile(filename)): os.remove(filename)
    outfile = open(filename, 'w')
    outfile.write(json.dumps(data, indent=4, sort_keys=True))
    outfile.close()

# Proxy because reasons
connection = http.client.HTTPSConnection('ftp.steamvape.ru:8080')
connection.set_tunnel('e621.net')

# Since we don't know the exact quantity of pages, we have to use while
stop = False
#page = 1
page = 1838
while(stop == False):
    posts = list(map(preppost, getposts(page)))
    writejson(posts, 'pages/page_'+str(page)+'.json')
    print('Successfully dumped page', str(page))
    page += 1
    if(len(posts) < 50): stop = True
    else: sleep(randint(5,20))