Python提取HM編碼結果的批處理

import re
import string
import os

f_out = open('/Users/mengwang/Downloads/HM-16.0/BDrate.txt', 'w+')

def searchResult(chunk, matchSyntax, index):
    if re.search(matchSyntax, chunk):
        splitWord = re.split(r'\s+', chunk)
        #print chunk
        #print splitWord[3]
        matchWord = []
        matchWord.append(splitWord[index])
        return matchWord

def writeResult(result):
    f_out.write("%-20s"%(result[0]))
    f_out.write("%-10s"%(result[1]))
    f_out.write("%-10s"%(result[2]))
    f_out.write("%-10s"%(result[3]))
    f_out.write("%-10s"%(result[4]))
    f_out.write("\n")

rootdir = '/Users/mengwang/Downloads/HM-16.0/encResult'
list = os.listdir(rootdir)

for i in range(0,len(list)):
        pathDir = os.path.join(rootdir,list[i])
        if os.path.isfile(pathDir):
            f = open(pathDir, 'r')
            while 1:
                chunk = f.readline()
                if chunk == '':
                    break
                matchWord = 'SUMMARY'
                findResult = searchResult(chunk, matchWord, 0)
                if findResult:
                    chunk1 = f.readline()
                    chunk2 = f.readline()
                    splitEncResult = re.split(r'\s+', chunk2)
                    print chunk2
                    print pathDir
                    BDRATE = []
                    BDRATE.append(splitEncResult[3])
                    BDRATE.append(splitEncResult[4])
                    BDRATE.append(splitEncResult[5])
                    BDRATE.append(splitEncResult[6])
                    BDRATE.append(pathDir)
                    writeResult(BDRATE)

HM的report格式和AVS不一樣，AVS可以直接定位到關鍵字然後做完分割就可以取到想要的數據，但是HM的關鍵字應該是summary那一行，對應的結果再summer的下下行，像這樣。

SUMMARY --------------------------------------------------------
	Total Frames |   Bitrate     Y-PSNR    U-PSNR    V-PSNR    YUV-PSNR 
	        5    a   12700.6080   41.4903   43.6672   44.2743   42.1685


I Slices--------------------------------------------------------
	Total Frames |   Bitrate     Y-PSNR    U-PSNR    V-PSNR    YUV-PSNR 
	        5    i   12700.6080   41.4903   43.6672   44.2743   42.1685


P Slices--------------------------------------------------------
	Total Frames |   Bitrate     Y-PSNR    U-PSNR    V-PSNR    YUV-PSNR 
	        0    p          nan       nan       nan       nan       nan


B Slices--------------------------------------------------------
	Total Frames |   Bitrate     Y-PSNR    U-PSNR    V-PSNR    YUV-PSNR 
	        0    b          nan       nan       nan       nan       nan

RVM: 0.000
Bytes written to file: 132329 (12703.584 kbps)

 Total Time:        4.734 sec

對於python的格式化輸出一直不太熟：
%-10s代表輸出數據左對齊，右邊添加佔位符
%10s代表輸出數據右對齊，左邊添加佔位符


所以採用左對齊的形式，當數據位數比較多的時候，當前輸出應該留出足夠多的佔位符。