Script for turning a list of LEGO entityIDs into a BrickLink wishlist

bricklink.py

"""
Map lego entity IDs to BrickLink part numbers and colour code. Output them
as BrickLink XML. Copy and paste the output into your wish list.

This script only uses core Python, with no external dependencies.
"""
import http.client
import random
import re
import time

# Update this with your list of entity IDs
data = """
123456
234567 (8)
345678
"""

BRICKLINK = "www.bricklink.com"
ENTITY_ID_REGEX = re.compile(r"(\d{6,7})(\s+\((\d+)\))?")
ITEM_REGEX = re.compile(r",\\titemno:\\t\\t\\t\\'(\w+)\\'")
REDIRECT_REGEX = re.compile(r"id=(\d+)&idColor=(\d+)&")

def get_entity_to_item(entity_id):
    path = f"/v2/catalog/catalogitem.page?ccName={entity_id}"
    client = http.client.HTTPSConnection(BRICKLINK)

    client.request("GET", path)
    response = client.getresponse()

    location = [val for header, val in response.getheaders() if header == "Location"][0]
    response.read()

    matches = REDIRECT_REGEX.search(location)
    colour = matches[2]

    time.sleep(random.randrange(100, 5000) / 1000)

    new_path = f"/{location.split('/', 3)[3]}"
    client.request("GET", new_path)
    response = client.getresponse()

    item_id = f"ERROR__ENTITY_ID_{entity_id}"
    try:
        matches = ITEM_REGEX.search(str(response.read()))
        item_id = matches.groups()[0]
    except:
        pass

    return (item_id, colour)


print("<INVENTORY>")

items = [line.strip() for line in data.splitlines()]
for item in items:
    if not item:
        continue
    matches = ENTITY_ID_REGEX.match(item).groups()
    entity_id = matches[0]

    qty = 1
    if matches[2]:
        qty = matches[2]

    (item_id, colour) = get_entity_to_item(entity_id)

    print(f"""	<ITEM>
        <ITEMTYPE>P</ITEMTYPE>
        <ITEMID>{item_id}</ITEMID>
        <COLOR>{colour}</COLOR>
        <MINQTY>{qty}</MINQTY>
    </ITEM>""")

    time.sleep(random.randrange(100, 10000) / 1000)

print("</INVENTORY>")