From 0f141a3e4ab790a681d4eff1445b5c2ee7443304 Mon Sep 17 00:00:00 2001
From: Akkariiin <Akkariin@protonmail.com>
Date: Mon, 20 Aug 2018 13:37:21 +0800
Subject: [PATCH] add typing hint

---
 shadowsocks/obfsplugin/plain.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/shadowsocks/obfsplugin/plain.py b/shadowsocks/obfsplugin/plain.py
index 593a23f..00f5355 100644
--- a/shadowsocks/obfsplugin/plain.py
+++ b/shadowsocks/obfsplugin/plain.py
@@ -96,6 +96,13 @@ class plain(object):
         pass
 
     def get_head_size(self, buf: bytes, def_value: int) -> int:
+        """
+        get size From SOCKS5 head type info
+
+        :param buf: bytes       the header from SOCKS5
+        :param def_value: int   if cannot detect type
+        :return:  the header really size
+        """
         if len(buf) < 2:
             return def_value
         head_type = ord(buf[0]) & 0x7