From f915b6c9b5d8077a6e8d2506f5f40bc9b4b9ae0c Mon Sep 17 00:00:00 2001
From: HansBug <hansbug@buaa.edu.cn>
Date: Tue, 24 May 2022 13:48:43 +0800
Subject: [PATCH] doc(hansbug): add comments for default argument

---
 hbutils/string/template.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hbutils/string/template.py b/hbutils/string/template.py
index d5253c49cea..18cdfab131f 100644
--- a/hbutils/string/template.py
+++ b/hbutils/string/template.py
@@ -39,6 +39,8 @@ def env_template(template: str, environ: Optional[Mapping[str, Any]] = None,
         KeyError: 'B'
         >>> env_template('${A} + 1 = ${B}', {'A': '1'}, safe=True)
         '1 + 1 = ${B}'
+        >>> env_template('${A} + 1 = ${B}', {'A': '1'}, default='')  # like environment variable
+        '1 + 1 = '
     """
 
     class _DefaultDict(dict):