增加 Python str 与 bytes 之间的转换.

Signed-off-by: rick.chan <chenyang@autoai.com>

Software/Development/Language/Python/Python_str_与_bytes_之间的转换.md

@@ -0,0 +1,22 @@
+# Python str 与 bytes 之间的转换
+
+```python
+# bytes object  
+b = b"example"
+
+# str object  
+s = "example"  
+
+# str to bytes  
+sb = bytes(s, encoding = "utf8")  
+
+# bytes to str  
+bs = str(b, encoding = "utf8")  
+
+# an alternative method  
+# str to bytes  
+sb2 = str.encode(s)  
+
+# bytes to str  
+bs2 = bytes.decode(b)
+```