Question

我有一个文本文件，其中包含如下所示的数据：

########### PLURIMEDIA APP1 REPORT of Date 2020-03-17 10:55:43 #################
Number of events in EPG:- 105  for channel:- 229  for date:- 20200317
Number of events in EPG:- 38  for channel:- 526  for date:- 20200317
Number of events in EPG:- 105  for channel:- 229  for date:- 20200318
Number of events in EPG:- 46  for channel:- 526  for date:- 20200318
Number of events in EPG:- 128  for channel:- 229  for date:- 20200319
Number of events in EPG:- 46  for channel:- 526  for date:- 20200319
Number of events in EPG:- 128  for channel:- 229  for date:- 20200320
Number of events in EPG:- 46  for channel:- 526  for date:- 20200320
Number of events in EPG:- 102  for channel:- 229  for date:- 20200321
Number of events in EPG:- 26  for channel:- 526  for date:- 20200321
Number of events in EPG:- 103  for channel:- 229  for date:- 20200322
Number of events in EPG:- 27  for channel:- 526  for date:- 20200322
Number of events in EPG:- 128  for channel:- 229  for date:- 20200323
Number of events in EPG:- 46  for channel:- 526  for date:- 20200323
Number of events in EPG:- 24  for channel:- 229  for date:- 20200324
Number of events in EPG:- 8  for channel:- 526  for date:- 20200324
Number of images in EPG :- 112  for channel:- 229  for date:- 20200317
Number of images in EPG :- 10  for channel:- 526  for date:- 20200317
Number of images in EPG :- 109  for channel:- 229  for date:- 20200318
Number of images in EPG :- 11  for channel:- 526  for date:- 20200318
Number of images in EPG :- 132  for channel:- 229  for date:- 20200319

我想要（ EPg中的事件数：-105 ）

此数据来自文本文件。

Answer 1

如果您尝试获取包含 Epg：-105 的行，则代码如下：

file1 = open('myfile.txt', 'r') #read the txt file
Lines = file1.readlines() # read line by line

for line in Lines:
    if 'EPG:- 105' in line: # check for each line if it contains 'Epg :-105'
        print(line.strip()) # do whatever you want to do with those lines

然后您可以将这些行存储在列表中，而不必打印它们

Answer 2

您的问题并未明确指定是否要显示图像数据数量和事件数据数量。

import re
fh = open('file.txt')

for line in fh:
    line = line.rstrip()
    stuff = re.findall('Number of events in EPG:- [0-9]+', line)
    if len(stuff) == 0:
        continue
    else:
        print(stuff[0])

上面的代码已用于确定事件数数据。

同时查找事件数和图像数据数。使用下面给出的代码段。

import re
fh = open('file.txt')

for line in fh:
    line = line.rstrip()
    stuff = re.findall('Number of events in EPG:- [0-9]+', line)
    if len(stuff) == 0:
        stuff = re.findall('Number of images in EPG :- [0-9]+', line)
        if len(stuff) == 0:
            continue
        else:
            print(stuff[0])
    else:
        print(stuff[0])

以上代码段使用了正则表达式的知识。

我想通过python从文本文件中提取特定数据

2 个答案: