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Certain Roblox endpoints are paginated. This means that going through their data is kind of like flipping through the pages of a book - you start at page 1 and then you can move forwards or backwards until you reach the start or the end.

This can be annoying when all you want is "every member in a group" or "the last 10 posts on a group wall", so abstracts this away into a "PageIterator" that you can use to loop over your data.

As an example, the Client.user_search() function takes in a keyword (like "builderman") and returns a PageIterator which you can loop through to get the search results.

Looping through items

A simple async for can loop through the data no problem:

async for user in client.user_search("builderman"):
We can limit the amount of items returned using the max_items argument:
async for user in client.user_search("builderman", max_items=10):
We can also use .items():
async for user in client.user_search("builderman").items(10):

Looping through pages

If we want to instead loop through each page, we can use .pages():

async for page in client.user_search("builderman").pages():
    for user in page:
The size of this page depends on the value of the page_size argument. It can be either 10, 25, 50 or 100. Higher values mean you send less requests to get the same amount of data, however these requests will usually take longer.

async for page in client.user_search("builderman", page_size=100).pages():
    print(f"Page with {len(page)} items:")
    for user in page:

Flattening into a list

If we want to turn all of this data into one list, we can use flatten(). Be careful, as this isn't ideal for large sets of data and may use more memory. Because we turn this iterator into a list, we can use a normal for loop now:

for user in await client.user_search("boatbomber").flatten():
We can limit the amount of items in this list using the max_items argument:
for user in await client.user_search("builderman", max_items=10).flatten():
We can also pass the value directly to .flatten():
for user in await client.user_search("builderman").flatten(10):
As the result is just a normal list, we can store it in a variable:
users = await client.user_search("builderman").flatten(10)
print(f"{len(users)} items:")
for user in users:

But what about other things?

Iterators aren't just used for searching for users. There are also various other things that use this same concept, including group wall posts. In this example, we get the first 10 posts on the "Official Group of Roblox" group:

group = await client.get_group(1200769)
async for post in group.get_wall_posts(max_items=10):
If instead we want the last 10 posts (as in the most recent posts) we can use the sort_order argument:
group = await client.get_group(1200769)
async for post in group.get_wall_posts(sort_order=SortOrder.Descending, max_items=10):
The SortOrder object can be imported like this:
from roblox.utilities.iterators import SortOrder