将行存储到数组中并逐行打印

Question

当前代码：

filepath = "C:/Bg_Log/KLBG04.txt"
with open(filepath) as fp:
    lines = fp.read().splitlines()
    with open(filepath, "w") as fp:
        for line in lines:
            print("KLBG04",line,line[18], file=fp)

输出：

KLBG04 20/01/03 08:09:13 G0001 G

需要灵活地移动列并使用数组或列表操作日期，如下所示

KLBG04 03/01/20 G0001 G 08:09:13

Answer 1

为什么不将输出本身存储为字符串并使用 split() 方法在每个 space 处拆分字符串，然后对索引 1 使用另一种拆分方法（索引将包含日期）并在每个 / 处再次拆分（这样您就可以操纵日期）。


for line in lines:
        String output ="KLBG04",line,line[18], file=fp   # Rather than printing store the output in a string #
x = output.split(" ")
date_output = x[1].split("/")
# Now you can just manipulate the data around and print how you want to #

Answer 2

尝试先split()该行，然后按您想要的顺序打印列表

from datetime import datetime # use the datetime module to manipulate the date

filepath = "C:/Bg_Log/KLBG04.txt"
with open(filepath) as fp:
    lines = fp.read().splitlines()
    with open(filepath, "w") as fp:
        for line in lines:
            date, time, venue = line.split(" ") # split the line up
            date = datetime.strptime(date, '%y/%m/%d').strftime('%d/%m/%y') # format your date
            print("KLBG04", date, venue, venue[0], time, file=fp) # print in your desired order

Answer 3

您没有提供示例数据，但我认为这可能有效：

filepath = "C:/Bg_Log/KLBG04.txt"
with open(filepath) as fp:
    lines = fp.read().splitlines()
    with open(filepath, "w") as fp:
        for line in lines:
            ln = "KLBG04 " + line + " " + line[18]  # current column order
            sp = ln.split()  # split at spaces
            dt = '/'.join(sp[1].split('/')[::-1])  # reverse date
            print(sp[0],dt,sp[3],sp[-1],sp[-2]) # new column order
            # print("KLBG04",line,line[18], file=fp)

Answer 4

试试这个 `

for line in lines:
    words = line.split()  # split every word
    date_values = words[0].split('/') # split the word that contains date
    
    #create a dictionary as follows
    date_format = ['YY','DD','MM']
    date_dict = dict(zip(date_format, date_values))
    
    #now create a new variable with changed format
    new_date_format = date_dict['MM'] + '/' + date_dict['DD'] + '/' + date_dict['YY']
    print(new_date_format)
    
    #replace the first word [index 0 is having date] with new date format
    words[0] = new_date_format
    
    #join all the words to form a new line
    new_line = ' '.join(words)
    print("KLBG04",new_line,line[18])

`

将行存储到数组中并逐行打印

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