python 处理文件

好久没写过python了天 一点点查的

import os
import re
from decimal import *
import math
'''
def getfiles():
    filenames=os.listdir(r'F:filePythonvolume')
    print(len(filenames))
getfiles()
'''
name = "F:\filePython\volume" #!!\
packagenames = os.listdir(r'F:filePythonvolume') #返回值是list类型
print(len(packagenames)) #得到六个子文件夹
for package in packagenames:
    #print(package)
    file2_path = package + ".txt"
    f2 = open(file2_path,"w") #文件创建在了本目录下
    filenames = os.path.join(name,package)
    #print(filenames) #得到各个文件夹的绝对路径值
    
    for filename in os.listdir(filenames):
        print(filename) #得到单个文件 只是文件名 开始处理单个文件
        signalname = filename
        filename = os.path.join(filenames,filename)
        f = open(filename,"r",encoding = "utf-8")
        countz = 0
        counts = 0
        numberlist = []
        for line in f:
            #print("line: "+line)
            if line.startswith('#') | line.startswith('@'):
               countz += 1
            else :
                counts += 1
                numberlist.append(line)
                #print("line: "+line)
                #print(type(line)) #str
        #print(countz) #第25行开始数字
        #print(counts) #共497
        #print(len(numberlist))
        usenumberlist = []
        for row in numberlist:
            #对每一行进行处理 得到中间的那个数 再存储 判断类型别待会转不成
            usenumber = re.split(r"[ ]+", row)[2] #正则
            #print(usenumber) #str
            #print(type(usenumber))
            usenumberlist.append(usenumber)
        # 得到第二列的数值 存储在list数组
        #开始类型转换 进行精确计算decimal 
        sum = Decimal('0.0')
        for usen in usenumberlist:
            #print("usen: "+usen)
            sum += Decimal(usen)
        #print(sum)
        #计算均值
        average = Decimal('0.0')
        average = sum / Decimal(counts) #接受直接拿整型做参数
        print(average)
        straverage = str(Decimal(average))
        #print(straverage)
        #计算均方差
        sumvariance = Decimal('0.0')
        for usen in usenumberlist:
            #print("usen: "+usen)
            fac1 = Decimal(usen)
            sumvariance += (fac1 - average)*(fac1 - average)
        #print(sumvariance) #未开方前的分母
        fz = sumvariance / Decimal(counts-1) #未开方前的分子
        #计算标准差
        #print(fz.sqrt()) 
        StandardDeviation = fz.sqrt()
        #print(type(StandardDeviation)) #<class 'decimal.Decimal'>

        
        #本文件的内容：要写入三个part filename straverage StandardDeviation
        #print(signalname)
        f2.write("%-25s	 %35s	 %30s
"%(signalname, straverage, str(Decimal(StandardDeviation)))) #左靠齐输出
        
        #f2.write("11")
    

    '''
    #都弄好了之后
    #print(package)
    file2_path = package + ".txt"
    f2 = open(file2_path,"w") #文件创建在了本目录下
    f2.write("11")
    '''
    f2.close(）

我再说一次我不喜欢现在的代码形式