f36ab9556e634dc7d62253e239d7817c6e0eba32,firestore/cloud-client/snippets.py,,listen_multiple,#,690

Before Change

        u"population": 860000
    }
    db.collection(u"cities").document(u"SF").set(data)
    sleep(1)

    query_watch.unsubscribe()

After Change

    // [START listen_multiple]

    // Create an Event for notifying main thread.
    callback_done = threading.Event()

    // Create a callback on_snapshot function to capture changes
    def on_snapshot(col_snapshot, changes, read_time):
        print(u"Callback received query snapshot.")
        print(u"Current cities in California:")
        for doc in col_snapshot:
            print(u"{}".format(doc.id))
        callback_done.set()

    col_query = db.collection(u"cities").where(u"state", u"==", u"CA")

    // Watch the collection query
    query_watch = col_query.on_snapshot(on_snapshot)

    // [END listen_multiple]
    // Creating document
    data = {
        u"name": u"San Francisco",
        u"state": u"CA",
        u"country": u"USA",
        u"capital": False,
        u"population": 860000
    }
    db.collection(u"cities").document(u"SF").set(data)
    // Wait for the callback.
    callback_done.wait(timeout=60)
    query_watch.unsubscribe()


def listen_for_changes():

Instances