diff --git a/README.md b/README.md
index 411f4c2..c8e1723 100644
--- a/README.md
+++ b/README.md
@@ -18,18 +18,15 @@
 
 ### 示例
 
-转换后的 HTML 页面： [https://xlzd.me/hide/img2html/](https://xlzd.me/hide/img2html/)
-
-
 原始图片             |  转换后
 :-------------------------:|:-------------------------:
-![](https://raw.githubusercontent.com/xlzd/img2html/master/demo/before2.jpg)  |  ![](https://raw.githubusercontent.com/xlzd/img2html/master/demo/after2.png)
-![](https://raw.githubusercontent.com/xlzd/img2html/master/demo/before.png)  |  ![](https://raw.githubusercontent.com/xlzd/img2html/master/demo/after.png)
-
+![在这里插入图片描述](https://img-blog.csdnimg.cn/20200822122243148.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NPQ081Ng==,size_16,color_FFFFFF,t_70#pic_center)|![在这里插入图片描述](https://img-blog.csdnimg.cn/20200822122129328.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NPQ081Ng==,size_16,color_FFFFFF,t_70#pic_center)
+![在这里插入图片描述](https://img-blog.csdnimg.cn/20200822122255159.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NPQ081Ng==,size_16,color_FFFFFF,t_70#pic_center)|![在这里插入图片描述](https://img-blog.csdnimg.cn/20200822122141183.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NPQ081Ng==,size_16,color_FFFFFF,t_70#pic_center)
 ### 使用方式
 ---
 
 #### 命令行
+使用帮助：
 ```
 usage: img2html [-h] [-b #RRGGBB] [-s 4~30] [-c CHAR] [-t TITLE] [-f FONT] -i
                 IN [-o OUT]
@@ -46,44 +43,57 @@ optional arguments:
   -o OUT, --out OUT                 output file
 ```
 
+使用实例：
+直接在命令行中输入`img2html -i 图片路径 -o 网页路径`
+
+如：`img2html -i D:\before.png -o D:\index.html`
+
+![在这里插入图片描述](https://img-blog.csdnimg.cn/20200822123102209.png#pic_center)
+
 
 #### 代码调用
 
 ```Python
 from img2html.converter import Img2HTMLConverter
+import codecs
 
-converter = Img2HTMLConverter(*some config here*)
-html = converter.convert(*image_path*)
-
-# done, so easy.
+converter = Img2HTMLConverter()
+html = converter.convert(r'D:\before.png')
+with codecs.open(r'D:\index.html', 'wb', encoding='utf-8') as fp:
+    fp.write(html)
 ```
 
 
 ### 安装
 ---
+对于Python3.x来说，由于作者没有适配Python3.x，因此应通过我写的源码安装：
+
+```
+git clone https://github.com/cocos56/img2html.git
+cd img2html
+python setup.py install
+```
+
+
+对于Python2.x来说
 
 `img2html` 已经上传到了 [PYPI](https://pypi.python.org/pypi/img2html)，所以最简单的安装方式就是使用 pip：
 
 ```
-$ pip install img2html
+pip install img2html
 ```
 
 更新：
 
 ```
-$ pip install img2html --upgrade
+pip install img2html --upgrade
 ```
 
-
-当然，你也可以通过源码安装：
-
+卸载：
 ```
-$ git clone https://github.com/xlzd/img2html.git
-$ cd img2html
-$ python setup.py install
+pip uninstall img2html
 ```
 
-
 ### License
 ---
 
diff --git a/img2html/converter.py b/img2html/converter.py
index 046758c..a03aee4 100644
--- a/img2html/converter.py
+++ b/img2html/converter.py
@@ -53,14 +53,14 @@ def _progress_callback(percent):
         lca = getattr(_progress_callback, '_last_call_at', 0)
         if time.time() - lca > 0.1:
             _progress_callback._last_call_at = time.time()
-            sys.stdout.write('\r{} progress: {:.2f}%'.format(_c.next(), percent))
+            sys.stdout.write('\r{} progress: {:.2f}%'.format(_c.__next__(), percent))
             sys.stdout.flush()
 
 
 class Img2HTMLConverter(object):
     def __init__(self,
                  font_size=10,
-                 char='䦗',
+                 char='爱',
                  background='#000000',
                  title='img2html by xlzd',
                  font_family='monospace',
@@ -69,8 +69,6 @@ def __init__(self,
         self.background = background
         self.title = title
         self.font_family = font_family
-        if isinstance(char, str):
-            char = char.decode('utf-8')
         self.char = cycle(char)
         self._prg_cb = progress_callback or _progress_callback
 
@@ -85,19 +83,19 @@ def convert(self, source):
         progress = 0.0
         step = 1. / (col_blocks * row_blocks)
 
-        for col in xrange(col_blocks):
+        for col in range(col_blocks):
             render_group = RenderGroup()
-            for row in xrange(row_blocks):
+            for row in range(row_blocks):
                 pixels = []
-                for y in xrange(self.font_size):
-                    for x in xrange(self.font_size):
+                for y in range(self.font_size):
+                    for x in range(self.font_size):
                         point = Point(row * self.font_size + x, col * self.font_size + y)
                         if point.x >= width or point.y >= height:
                             continue
                         pixels.append(Pixel(*image.getpixel(point)[:3]))
                 average = self.get_average(pixels=pixels)
                 color = self.rgb2hex(average)
-                render_item = RenderItem(color=color, char=self.char.next())
+                render_item = RenderItem(color=color, char=self.char.__next__())
                 render_group.append(render_item)
 
                 progress += step