将行存储到数组中并逐行打印答案

【问题标题】：Storing lines into array and print line by line将行存储到数组中并逐行打印
【发布时间】：2020-10-25 03:37:07
【问题描述】：

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如下所示的日期

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

【问题讨论】：

标签： python arrays sorting readlines

【解决方案1】：

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)

【讨论】：

谢谢@mike67。该代码对我来说非常有效，但是由于我是编程新手，所以我不能发表太多评论

【解决方案2】：

先尝试split() 行，然后按所需顺序打印列表

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

【讨论】：

【解决方案3】：

为什么不将输出本身存储为字符串并使用split()方法在每个空格处拆分字符串，然后对索引1（将包含日期的索引）使用另一种拆分方法并拆分在每个/ 再次调用它（这样你就可以操纵日期）。


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 #

【讨论】：

我建议无论何时处理时间，使用日期和时间操作模块，例如datetime，以获得更简洁、更易理解的代码。
是的，这将是解决此问题的更好方法

【解决方案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])

【讨论】：