python截取文件指定行进行合并.py，python.py,＂＂＂python截取文

python截取文件指定行进行合并.py，python.py,"""python截取文

"""python截取文件指定行进行合并.pyhttp://bbs.bathome.net/thread-38205-1-1.html依山居 23:10 2015/11/24懒得解释~"""import reimport osimport sysdatadirs="./DATAS/"outputdirs="./DATAS/合并后/"ls=os.listdir(datadirs)rec=re.compile(r"([A-Z]{2}-[A-Z]\d-[A-Z]\d)-\d{2}.csv")fn={r for r in re.findall(rec,str(ls))}fn=sorted(fn)if len(fn)<1:    input("没有找到文件")    sys.exit(0)for r in fn:    csv1=datadirs+r+"-01.csv"    csv2=datadirs+r+"-02.csv"    csv3=datadirs+r+"-03.csv"    out=r+".csv"    if os.path.exists(csv1):        with open(csv1) as f:            c1=f.readlines()[:3]    if os.path.exists(csv2):        with open(csv2) as f:            c2=f.readlines()[3:]        c1=c1+c2    if os.path.exists(csv3):        with open(csv3) as f:            c3=f.readlines()[3:]        c1=c1+c3    with open(outputdirs+out,"w+") as f:        f.writelines(c1)