From e3cc2f121de0cf88a30860e244112265ea42db53 Mon Sep 17 00:00:00 2001
From: Dan <14043624+delivrance@users.noreply.github.com>
Date: Thu, 15 Mar 2018 09:50:37 +0100
Subject: [PATCH] Add get_participants2.py

---
 examples/README.md            |  1 +
 examples/get_participants2.py | 63 +++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 examples/get_participants2.py

diff --git a/examples/README.md b/examples/README.md
index 6f640ef4..545516fa 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -8,6 +8,7 @@ you have to change are the target chats (username, id) and file paths for sendin
 - [**hello_world.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/hello_world.py)
 - [**get_history.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/get_history.py)
 - [**get_participants.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/get_participants.py)
+- [**get_participants2.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/get_participants2.py)
 - [**inline_bots.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/inline_bots.py)
 - [**updates.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/updates.py)
 - [**simple_echo.py**](https://github.com/pyrogram/pyrogram/blob/master/examples/simple_echo.py)
diff --git a/examples/get_participants2.py b/examples/get_participants2.py
new file mode 100644
index 00000000..23ed328f
--- /dev/null
+++ b/examples/get_participants2.py
@@ -0,0 +1,63 @@
+import time
+from string import ascii_lowercase
+
+from pyrogram import Client
+from pyrogram.api import functions, types
+from pyrogram.api.errors import FloodWait
+
+"""
+This is an improved version of get_participants.py
+
+Since Telegram will return at most 10.000 users for a single query, this script
+repeats the search using numbers ("0" to "9") and all the available ascii letters ("a" to "z").
+
+This can be further improved by also searching for non-ascii characters (e.g.: Japanese script),
+as some user names may not contain ascii letters at all.
+"""
+
+client = Client("example")
+client.start()
+
+target = "username"  # Target channel/supergroup username or id
+users = {}  # To ensure uniqueness, users will be stored in a dictionary with user_id as key
+limit = 200  # Amount of users to retrieve for each API call (200 is the maximum)
+
+# "" + "0123456789" + "abcdefghijklmnopqrstuvwxyz" (as list)
+queries = [""] + [str(i) for i in range(10)] + list(ascii_lowercase)
+
+for q in queries:
+    print("Searching for '{}'".format(q))
+    offset = 0  # For each query, offset restarts from 0
+
+    while True:
+        try:
+            participants = client.send(
+                functions.channels.GetParticipants(
+                    channel=client.resolve_peer(target),
+                    filter=types.ChannelParticipantsSearch(q),
+                    offset=offset,
+                    limit=limit,
+                    hash=0
+                )
+            )
+        except FloodWait as e:
+            # Very large chats could trigger FloodWait.
+            # When happens, wait X seconds before continuing
+            print("Flood wait: {} seconds".format(e.x))
+            time.sleep(e.x)
+            continue
+
+        if not participants.participants:
+            print("Done searching for '{}'".format(q))
+            print()
+            break  # No more participants left
+
+        # User information are stored in the participants.users list.
+        # Add those users to the dictionary
+        users.update({i.id: i for i in participants.users})
+
+        offset += len(participants.participants)
+
+        print("Total users: {}".format(len(users)))
+
+client.stop()