如何在python中将要搜索的文件和字符串列表作为命令行参数传递

之前，我打开一个文件，使用函数搜索字符串列表

def search_multiple_strings_in_file(file_name, list_of_strings):
    line_number = 0
    parsing = False
    list_of_results = []
    with open(file_name, 'r') as read_obj:
        for line in read_obj:
            line_number += 1
            for string_to_search in list_of_strings:
                if string_to_search in line:
                    print("================================================================================================")
                    print('Line:' , line_number, '', line.strip())
                    #print('[ERROR]feature = ',Exception, ", action = ", 'signalhandler' , ", no = ", 'signalno')
                    #print("-----------------------------------------------------------------------------------------------")
                    next(read_obj)
                    for line1 in read_obj:
                        if line1.startswith(">>>>>>backtrace_"):
                            parsing = True
                        if line1.strip().endswith("<<<<<<backtrace_end"):
                            parsing = False
                        if parsing == True:
                            print(line1.strip())
                        else:
                            print("<<<<<<backtrace_end")
                            break

search_multiple_strings_in_file('CrashDump.log', ['[ERROR]feature=Exception, action=signalhandler, no='])

---

但是它没有得到正确的输出（正确的输出就是我上面写的输出）。

['[ERROR]feature=Exception，action=signalhandler，no=']

是一个包含字符串的数组

sys.argv[2]

是一个字符串

你需要

if __name__ == '__main__':
    if len(sys.argv) == 2:
        print("Pass a file to parse as an argument")
        sys.exit()
    else:
        search_multiple_strings_in_file(sys.argv[1], sys.argv[2:])

现在，第一个命令行参数是文件名，下面的参数作为第二个参数在列表中传递给函数，例如

python3 prog.py "CrashDump.log" "[ERROR]feature=Exception, action=signalhandler, no="

---

我得到了问题的答案，我是这样做的：

    
import sys


def search_multiple_strings_in_file(file_name, list_of_strings):
    #local variabes declaration
    line_number = 0
    parsing = False
    list_of_results = []

    #opening the file as read_obj in read mode
    with open(file_name, 'r') as read_obj:
        for line in read_obj:
            line_number += 1
            for string_to_search in list_of_strings: #searching the string in the file
                if string_to_search in line: #if string is present in the particular line it will enter the if condition
                    print("================================================================================================")
                    print(line.strip())
                    next(read_obj)
                    for line1 in read_obj:       #In this for loop, printing the logs present between the two strings ">>>>>>backtrace_" and "<<<<<<backtrace_end"
                        if line1.startswith(">>>>>>backtrace_"):
                            parsing = True
                        if line1.strip().endswith("<<<<<<backtrace_end"):
                            parsing = False
                        if parsing == True:
                            print(line1.strip())
                        else:
                            print("<<<<<<backtrace_end\n")
                            break

        print("================================================================================================")


file_to_parse = sys.argv[1] #Assigning the argument to a variable
search_multiple_strings_in_file(file_to_parse, ['[ERROR]feature=Exception, action=signalhandler, no='])

对于作为参数的字符串列表，我们可以这样做：

if __name__ == '__main__':
    if len(sys.argv) == 2:
        print("Pass a file to parse as an argument")
        sys.exit()
    else:
        search_multiple_strings_in_file(sys.argv[1], sys.argv[2])

    
if __name__ == '__main__':
    if len(sys.argv) == 2:
        print("Pass a file to parse as an argument")
        sys.exit()
    else:
        search_multiple_strings_in_file(sys.argv[1], sys.argv[2:])

要运行脚本，请执行以下操作：

    
python3 prog.py "CrashDump.log" "[ERROR]feature=Exception, action=signalhandler, no="

---

到底是什么问题？它没有得到期望的输出不是一个明确的问题陈述。你有错误吗？输出错误？您的编辑并没有真正改变任何东西。。。我们理解您无法获得所需的输出（如上所述）。你得到了什么输出？另外，由于问题是关于命令行参数的，请向我们展示您是如何运行脚本的，所以您基本上用另一个答案中的建议解决了问题，并就此写了一个答案？这不是这个网站的工作方式，对于那些花时间为你写答案的人来说是不尊重的。如果这对你有帮助，你可以投票和/或接受答案。不要使用其他答案的方法发布答案…@Tomerikoo，在他发布答案之前，我已经解决了答案，但我最近更新了这里，仅此而已，即使我之前对他的答案投了更高的票，我也发布了我的答案。不要太私人化。

    
if __name__ == '__main__':
    if len(sys.argv) == 2:
        print("Pass a file to parse as an argument")
        sys.exit()
    else:
        search_multiple_strings_in_file(sys.argv[1], sys.argv[2:])

    
python3 prog.py "CrashDump.log" "[ERROR]feature=Exception, action=signalhandler, no="