python 解析日志文件：在不同的行中找到两个特定的字符串并连接到一个并写入另一个文件！ 避免空行

Question

My log like this file

what I need to look like:

Line: 5, Error: The member of the Account dimension is not base level.|>>>>>>A1399
Line: 6, Error: No such member|>>>>>>401700

I need to parse a log file and find only the errors that are of interest and write them to another file. Below is the code using the two tags ( 'Line:','>>>>>>' ) I need to get all the strings after these two tags and concatenate in one new line.
I get a lot of empty lines and the two tags are in different lines.
Thank you in advance!

def main():
    fo = open("C:\\Users\\yannis\\py_script\\1198.log", "r", encoding="ISO-8859-1")
    ofile = open("C:\\Users\\yannis\\py_script\\out.txt",'a', newline='')
    member = ""
    erro = ""

    f1 = fo.readlines()
    for x in f1:
        erro = (x[x.find('Line:'):])
        member = (x[x.find('>>>>>>'):])

        linha = (erro + member)
        print(linha)
        ofile.write(linha)
        continue




    fo.close()
    ofile.close()



main()

Answer 1

def log_parser(path):
    with open(path, 'r', encoding='utf-8') as f:
        temp = dict()
        for index, line in enumerate(f.readlines()):
            _line_except = line[:-1]
            [day, time, level, something, *arg] = _line_except.split(' ')

            if 'Error:' in arg and 'Line:' in arg:
                temp = {
                    "log_info": " ".join([day, time, level, something]),
                    "log_str": " ".join(arg)
                }
            elif len(arg) == 1:
                print("{log_info} {log_str} || {other_args}".format(
                    log_info=temp['log_info'],
                    log_str=temp['log_str'],
                    other_args=arg[0])
                )
            else:
                continue


if __name__ == '__main__':
    log_parser("log.txt")

AND you will get..

"""
OUTPUT : 
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 5, Error: The member of the Account dimension is not base level. || >>>>>>A1399
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 6, Error: No such member || >>>>>>401700
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 7, Error: The member of the Account dimension is not base level. || >>>>>>A1399
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 15, Error: The member of the Account dimension is not base level. || >>>>>>A2090
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 16, Error: The member of the Account dimension is not base level. || >>>>>>A2090
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 26, Error: No such member || >>>>>>101020
2020-07-03 15:21:58,962 ERROR [AIF]: Line: 27, Error: No such member || >>>>>>10132
"""

there is something err will be occured, when you don't write ">>>>12345" in log file. -> it will be discard before temp string. you should recognize it.