From 01c8bf2589f9c6daf538819c0e53570e5d78bfca Mon Sep 17 00:00:00 2001
From: Birger Jarl <codefuhrer@gmail.com>
Date: Wed, 29 Nov 2017 05:00:40 +0300
Subject: [PATCH] Fixes file downloading error

`date`'s default value is `None`, so this function will crash if `name` is empty and `date` is not provided
---
 telethon/telegram_client.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/telethon/telegram_client.py b/telethon/telegram_client.py
index fc4b4342..a63a8c82 100644
--- a/telethon/telegram_client.py
+++ b/telethon/telegram_client.py
@@ -967,6 +967,8 @@ class TelegramClient(TelegramBareClient):
                 name = None
 
             if not name:
+                if not date:
+                    date = datetime.now()
                 name = '{}_{}-{:02}-{:02}_{:02}-{:02}-{:02}'.format(
                     kind,
                     date.year, date.month, date.day,