A small snippet to search and replace in all of your Notion.

search_and_replace_notion.py

import notion
from notion.client import NotionClient

from collections import Counter
from tqdm import tqdm
from pprint import pprint

from getpass import getpass


search_for = "value_to_be_searched"
replace_with = "new_value"


# Obtain the `token_v2` value by inspecting your browser cookies on a logged-in session on Notion.so
client = NotionClient(token_v2=getpass("Token?"))

# Search all blocks containing the domain we want to change
search_results = client.search_blocks(search_for, limit=1000)

# Pretty print the breakdown by block types
pprint(Counter([type(b) for b in search_results]))

# Define separate block types according to where we should look for text
# (this was established after manual examination)
map_block_types_by_attribute = {
    "title": [notion.block.TextBlock, notion.collection.CollectionRowBlock, notion.block.BulletedListBlock,
              notion.block.SubheaderBlock, notion.block.CalloutBlock, notion.block.NumberedListBlock,
              notion.block.SubsubheaderBlock, notion.block.CodeBlock, notion.block.TodoBlock],
    "caption": [notion.block.ImageBlock, notion.block.BookmarkBlock]
}

block_type_to_attribute = {block_type: attr
                           for attr, block_types_list in map_block_types_by_attribute.items()
                           for block_type in block_types_list}

# Replace the occurrences we want
for block in tqdm(search_results):
    block_type = type(block)
    attr = block_type_to_attribute.get(block_type)
    if attr is None:
        continue
    block.__setattr__(attr,
                      block.__getattribute__(attr).replace(search_for,
                                                           replace_with))

Needs Python 3.5+, and pip install notion tqdm