python文件流讀寫(xiě)怎么操作？

file_to_read = raw_input("Enter file name of tests (empty string to end program):")
try:
    infile = open(file_to_read, 'r')
    while file_to_read != " ":
        file_to_write = raw_input("Enter output file name (.csv will be appended to it):")
        file_to_write = file_to_write + ".csv"
        outfile = open(file_to_write, "w")
        readings = (infile.readline())
        print readings
        while readings != 0:
            global count
            readings = int(readings)
            minimum = (infile.readline())
            maximum = (infile.readline())

result = list()
    with open('../test/parameter.txt') as  f:
        for line in f.readlines():
            temp = list()
            # 逐個(gè)遍歷對(duì)應(yīng)每一行元素，將之轉(zhuǎn)為對(duì)應(yīng)的數(shù)據(jù)
            b = line.strip(",][").split(',')
            if(len(b) >= 5):
                b.pop()
            for a in b:
                a = a.replace('[','').replace(']','')
                temp.append(float(a))
            result.append(temp)
            #print("中途打印的temp是",temp)
            #print("加入到result中的結(jié)果是",result)

# 刪除字符串中多余字符
def string_remove():
   str1 = ' abc     
'
   print str1.strip()   # abc

   str2 = '----abcdf++++'
   print str2.strip('-+')  # abcdf

ss = 'old old string'
ret = ss.replace('old', 'new', 1)
print(ret)

str2 = '
abc
wrt22	666	'  # 刪除字符串中的所有
,	
import re
print(re.sub('[
	]','',str2))   # abcwrt22666