Windows下的bat, linux 下的shell 用來做批處理都很好用, 可惜不通用
用 Python 來做就簡單多了, 不過一條條寫程式碼來呼叫系統命令也夠煩的了
程式設計師都很懶, 不願做機械無謂的重複性工作, 乾脆自己實現一個.

用法超級簡單, 預設會執行一個自定義的 batch.json, 按順序一條條執行其中的步驟

{"steps": 
    [
    {"step":"df -h","desc":"display disk space usage"},
    {"step":"date","desc":"display the current dater"},
    {"step
 
":"time","desc":"display the current time"}
    ]
}

用法:

    python batch.py

當然也可以指定不同的步驟檔案 , 例如

    python batch.py xxx.json

執行結果以markdown形式輸出, 例如

$ python batch.py
Usage: python batch.py <batch_json_file>
note: execute the batch.json by default
# Execute batch.json begin
---------------------------
 


## Will execute 3 steps
~~~~~~~~~~~~~~~~~~~~~~~~~~~
0. [df -h]: display disk space usage
1. [date]: display the current dater
2. [time]: display the current time

* 0. [df -h]: display disk space usage
Filesystem                          Size   Used  Avail Capacity  iused   ifree %iused  Mounted on
/dev/disk1                         233Gi  208Gi   24Gi    90% 54622825 6364694   90%   /
devfs                              329Ki  329Ki    0Bi   100%     

* 
 
1. [date]: display the current dater
Thu Mar  3 22:50:21 CST 2016

* 2. [time]: display the current time

real    0m0.001s
user    0m0.000s
sys 0m0.000s

## Done the following steps
~~~~~~~~~~~~~~~~~~~~~~~~~~~
0. [df -h]: display disk space usage
1. [date]: display the current dater
# Execute batch.json end.

Python 原始碼如下, 希望有人能用得上

'''
    like bat file, execute the steps in batch.json 
'''
import os,sys,subprocess
import time,thread
import codecs
import json
from datetime import datetime
from subprocess import call
from pprint import pprint

def execute_json(json_file):
    print "# Execute {0} begin\n---------------------------".format(json_file)

    json_data=open(json_file)
    data = json.load(json_data)
    cnt = len(data['steps'])
    i = 0
    print "\n## Will execute {0} steps \n~~~~~~~~~~~~~~~~~~~~~~~~~~~".format(cnt)
    for i in range(0, cnt):
            print "{0}. [{1}]: {2}".format(i, data['steps'][i]['step'], data['steps'][i]['desc'])

    #pprint(data)
    #print("cnt=", cnt)
    for i in range(0, cnt):
        cmd = data['steps'][i]['step']
        desc = data['steps'][i]['desc']
        print "\n* {0}. [{1}]: {2} ".format(i, cmd, desc)

        if(cmd.startswith('cd')):
            cmd = cmd.replace("cd ", "")
            os.chdir(cmd)
        else:
            ret = os.system(cmd)
            if(ret != 0):
                print "Encounter error of step {0}. {1}, error code={2}".format(i, cmd, ret)
                break

    print "\n## Done the following steps\n~~~~~~~~~~~~~~~~~~~~~~~~~~~"
    for j in range(0, i):
        print "{0}. [{1}]: {2}".format(j, data['steps'][j]['step'], data['steps'][j]['desc'])    
    json_data.close()
    print "# Execute {0} end.".format(json_file)

if __name__ == "__main__":
    argc = len(sys.argv)
    step_file = 'batch.json'
    if( argc > 1):
        idx = 1
        while(idx < argc):
            step_file = sys.argv[idx]
            execute_json(step_file)
            idx = idx + 1
    else:
        print "Usage: python {0} <batch_json_file>".format(sys.argv[0])
        print "note: execute the batch.json by default"
        execute_json(step_file)