Question

我想替换文本文件中的某一行，你是怎么做到的？这是文本文件：

Description,Shoe Size,Quantity
Reebok 111,11,2
Reebok 111,12,4
Reebok 111,9,10
Reebok 1301,6,4
Reebok 1301,7,4
Reebok 1301,8,4
Reebok 1301,9,4
Reebok 1301,10,40
Reebok A55,8,7
Reebok A55,9,8
Reebok A55,10,41
Asics 193ABC,10,20
Asics 193ABC,12,4
Asics 193ABC,9,10
Asics 293BC,11,2
Asics 293BC,12,42
Asics 293BC,9,100
Nike N1,6,6
Nike N1,7,4
Nike N1,8,2
Nike N1,9,4
Nike N1,10,40
Mizuno P1039,4,12
Mizuno P1039,7,9
Mizuno P1039,8,2
Mizuno P1039,19,8
Mizuno P1039,20,4

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这是我到目前为止所做的，但这只会在后面添加一行

def modifyQty(dbfilename,modelname,size,newcount):
    o=open(dbfilename,'a')
    dbfilename=open(dbfilename,'r')#opendatafile for read and reassign
    for line in dbfilename:
        values=line.split(',')#split by comma
        if values[0]==modelname and values[1]==size:
            line=line.replace(values[2],newcount)
            o.write(line+'\n')
    o.close()

modifyQty('shoes.txt','Reebok 111','11','1')

我想编辑第一行，即Reebok 111,11,2，进入Reebok 111,11,1，寻找匹配的型号和尺寸，只改变数量。所以期望的输出是：

Reebok 111, 11, 1

由于

这是我做的，它为shoes.txt的编辑版本创建了一个新的文本文件

def modifyQty(dbfilename,modelname,size,newcount):
    o = open(dbfilename, 'r')
    new_file = open('shoestextcopy.txt', 'w') #opens lol file
    data = o.readlines()
    for line in data:
        values = line.split(',') # split by comma
        if values[0] == modelname and values[1] == size:
            line = line.replace(values[2], newcount)
        new_file.write(line)
    o.close()
    new_file.close()
modifyQty('shoes.txt','Reebok 111','11','100000000 \n')

感谢所有帮助

Answer 1

我建议打开一个新文件写一下：

def modifyQty(dbfilename,modelname,size,newcount):
    o = open(dbfilename, 'r')
    new_file = open('abc.txt', 'w')
    data = o.readlines()
    for line in data:
        values = line.split().split(',') # split by comma
        if values[0] == modelname and values[1] == size:
            line = line.replace(values[2], newcount)
        new_file.write(line + '\n')
    o.close()
    new_file.close()

modifyQty('shoes.txt','Reebok 111','11','1')

替换python文本文件中的行

1 个答案: