Add in code sample (Close houtianze#378)

README.md

@@ -14,7 +14,7 @@ bypy - Python client for Baidu Yun (Personal Cloud Storage) 百度云/百度网
 中文说明 (English readme is at the bottom)
 ---
 
-:smile: 目录上传/下载/同步加入了多进程支持（`--processes`）
+- 最新: 目录上传/下载/同步加入了多进程支持（`--processes`）
 ---
 这是一个百度云/百度网盘的Python客户端。主要的目的就是在Linux环境下（Windows下应该也可用，但没有仔细测试过）通过命令行来使用百度云盘的2TB的巨大空间。比如，你可以用在Raspberry Pi树莓派上。它提供文件列表、下载、上传、比较、向上同步、向下同步，等操作。
 
@@ -101,6 +101,14 @@ bypy compare
 ---
 请移步至[wiki](../../wiki)，方便分享/交流。
 
+直接在Python程序中调用
+----
+```python
+from bypy import ByPy
+bp=ByPy()
+bp.list() # or whatever instance methods of ByPy class
+```
+
 授权许可
 ---
 请阅: [LICENSE](LICENSE)
@@ -110,7 +118,7 @@ bypy compare
 Introduction
 ---
 
-:smile: Multiprocessing added to directory upload / download / sync（`--processes`）
+- Latest feature: Multiprocessing added to directory upload / download / sync（`--processes`）
 ---
 This is a Python client for Baidu Yun (a.k.a PCS - Personal Cloud Storage), an online storage website offering 2 TB (fast) free personal storage. This main purpose is to be able to utilize this stoarge service under Linux environment (console), e.g. Raspberry Pi.
 
@@ -198,6 +206,15 @@ Tips / Sharing
 ---
 Please go to [wiki](../../wiki)
 
+To call from Python code
+----
+```python
+from bypy import ByPy
+bp=ByPy()
+bp.list() # or whatever instance methods of ByPy class
+```
+
+
 License
 ---