From 2f2fcf87bc07ffd94b1ad1aa17062f94853ab73e Mon Sep 17 00:00:00 2001
From: Rahul Gopinath <vrthra@users.noreply.github.com>
Date: Wed, 25 Dec 2019 10:10:53 +0100
Subject: [PATCH] Make sure that default_arg is not passed rather than checking
 for falsity

```
if not default_arg:
    ...
```
fails when `default_arg` can be assigned and still be false (implementing a `__bool__` or `__len__` etc). You dont want to overwrite the passed values.
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index de542ef..f2a825a 100644
--- a/README.md
+++ b/README.md
@@ -2173,7 +2173,7 @@ def some_func(default_arg=[]):
 
     ```py
     def some_func(default_arg=None):
-        if not default_arg:
+        if default_arg is not None:
             default_arg = []
         default_arg.append("some_string")
         return default_arg