easyrun 3.1

a simple subprocess manage

### 介绍

一个subprocess模块的封装,可以更方便的进行系统调用

To Do List:

1. return realtime result
2. task async run

### 安装

```
pip install easyrun
```

### 使用方法

只单纯的执行，然后返回linux run code和执行状态

```
>>> import easyrun
>>> r = easyrun.run('uptime')
04:06:37 up 2 min, 1 user, load average: 0.20, 0.19, 0.08
>>> r.output
>>> r.success
True
>>> r.retcode
0
```

捕捉所有的执行结果
```
>>> r = easyrun.run_capture('uptime')
>>> r.output
' 04:07:16 up 2 min, 1 user, load average: 0.11, 0.17, 0.08\n'
>>> r.success
True
>>> r.retcode
0
```

把输出的结果精简过,maxlines是控制行数
```
print(run_capture_limited('ls', maxlines=2).output)
```

easyrun example usage:

```
from easyrun import run_capture

r = run_capture('ls -la')
if r.success:
print(r.output)
else:
print("Error: '%s' exit code %s" % (r.command, r.retcode))
print(" ...")
# print last three lines of output
for line in r.output.splitlines()[-3:]:
print(" %s" % line)
```