update

content/post/python-op.md

@@ -7,30 +7,30 @@ categories: ["python"]
 ---
 
 ## 生成标准的、符合Unix/Posix 规范的命令行说明
-    ```python
-    from optparse import OptionParser
-    parser = OptionParser()
-    parser.add_option('-p', '--pdbk', action = 'store_true', dest = 'pdcl', default = False,
-                    help = 'write pdbk data to oracle db')
-    parser.add_option('-z', '--zdbk', action = 'store_true', dest = 'zdcl', default = False,
-                    help = 'write zdbk data to oracle db')
-    (options, args) = parser.parse_args()
-    if options.pdcl == True:
-        print 'pdcl is true.'
-    if options.zdcl == True:
-        print 'zdcl is True.'
-    ```
+```python
+from optparse import OptionParser
+parser = OptionParser()
+parser.add_option('-p', '--pdbk', action = 'store_true', dest = 'pdcl', default = False,
+                help = 'write pdbk data to oracle db')
+parser.add_option('-z', '--zdbk', action = 'store_true', dest = 'zdcl', default = False,
+                help = 'write zdbk data to oracle db')
+(options, args) = parser.parse_args()
+if options.pdcl == True:
+    print 'pdcl is true.'
+if options.zdcl == True:
+    print 'zdcl is True.'
+```
 
 ## 简单流程
-    ```python
-    # 引入OptionParser类，创建OptionParser对象
-    from optparse import OptionParser
-    parser = OptionParser()
-    # 定义命令行参数
-    parser.add_option(opt_str, ..., attr = value, ...)
-    # 解析命令行参数
-    (options, args) = parser.parse_args()
-    ```
+```python
+# 引入OptionParser类，创建OptionParser对象
+from optparse import OptionParser
+parser = OptionParser()
+# 定义命令行参数
+parser.add_option(opt_str, ..., attr = value, ...)
+# 解析命令行参数
+(options, args) = parser.parse_args()
+```
 
 ## parse_args 和 add_options 函数
 - parse_args() 接收一个命令行列表，默认使用 sys.argv\[:-1\]
@@ -93,12 +93,12 @@ categories: ["python"]
 - metavar 提醒用户该参数期待的参数，如 metavar = 'mode' 会在帮助中显示成 -m MODE, --mode=MODE
 
 ## OptionGroup 参数分组
-    ```python
-    group = OptionGroup(parser, 'Dangerous Options',
-                       'Caution: use these options at your own risk. It is believed that some of them bite.')
-    group.add_option('-g', action = 'store_true', help = 'Group option.')
-    parser.add_option_group(group)
-    ```
+```python
+group = OptionGroup(parser, 'Dangerous Options',
+                   'Caution: use these options at your own risk. It is believed that some of them bite.')
+group.add_option('-g', action = 'store_true', help = 'Group option.')
+parser.add_option_group(group)
+```
 
 - version 创建OptionParser对象时指定该参数，会解释成 --version 命令行参数
 - optparser 可以自动探测并处理一些用户异常，也可以使用 parser.error() 方法来自定义部分异常的处理