update

content/post/python-shell.md

@@ -6,7 +6,7 @@ tags: ["python", "shell"]
 categories: ["python"]
 ---
 
-# os
+## os
 - 阻塞，返回shell执行参数命令的状态,即成功返回0
     ```python
     os.system('cat /proc/cpuinfo')
@@ -16,7 +16,7 @@ categories: ["python"]
     os.popen('cat /proc/cpuinfo')
     ```
 
-# commands
+## commands
 - 阻塞，返回参数指定的系统文件的详细属性
     ```python
     commands.getstatus('/proc/cputinfo')
@@ -30,7 +30,7 @@ categories: ["python"]
     commands.getstatusoutput('cat /proc/cpuinfo')
     ```
 
-# subprocess
+## subprocess
 - 阻塞，返回shell状态，禁用 PIPE 参数
     ```python
     subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)
@@ -44,7 +44,7 @@ categories: ["python"]
     subprocess.check_output(args, *, stdin=None, stderr=None, shell=False, universal_newlines=False)
     ```
 
-# Pope
+## Pope
 - 不阻塞，返回Popen对象
 ```python
 subprocess.Popen(args, bufsize=0, executable=None, stdin=None, stdout=None, stderr=None, preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None, universal_newlines=False, startupinfo=None, creationflags=0)