I am searching in files with extensions .xml, .java, .properties strings that match certain regular expression.

When I find it - I write it to file with filename, line and string information.

My code looks like this

def search(param):
    filename = "search-result.txt"
    try:
        os.remove(filename)
    except OSError:
        pass
    os.path.walk(param, step, None)
                             
def step(ext, dirname, names):
    output = open("search-result.txt", "a")
    for name in names:
        if name.lower().endswith(".xml") or name.lower().endswith(".properties") or name.lower().endswith(".java"):
            path = os.path.join(dirname, name)
            filters = ["\\bin\\", "\\build\\", "logback", "\\test\\", "\\target\\"]
            if all(not filter in path for filter in filters):
                with open(path, "r") as lines:
                    print "Read: {}".format(path)
                    i = 1
                    for line in lines:
                        m = re.search(r"(!|$|RUP)\{[^:]*:[^\}]*\}", line)
                        if m is not None:
                            output.write("Path: {0}; \n    Line number: {1}; \n        {2}\n".format(path, i, line))
                        i += 1
    output.close()

I divided it into two functions - function search where I can check where result file is existed and remove it, and then step function for os.path.walk. Param - is a folder to search in.

How can be this code adjusted to look better?

I am searching in files with extensions .xml, .java, and .properties strings that match a certain regular expression.

When I find it, I write it to the file with the filename, line and string information.

def search(param):
    filename = "search-result.txt"
    try:
        os.remove(filename)
    except OSError:
        pass
    os.path.walk(param, step, None)
                             
def step(ext, dirname, names):
    output = open("search-result.txt", "a")
    for name in names:
        if name.lower().endswith(".xml") or name.lower().endswith(".properties") or name.lower().endswith(".java"):
            path = os.path.join(dirname, name)
            filters = ["\\bin\\", "\\build\\", "logback", "\\test\\", "\\target\\"]
            if all(not filter in path for filter in filters):
                with open(path, "r") as lines:
                    print "Read: {}".format(path)
                    i = 1
                    for line in lines:
                        m = re.search(r"(!|$|RUP)\{[^:]*:[^\}]*\}", line)
                        if m is not None:
                            output.write("Path: {0}; \n    Line number: {1}; \n        {2}\n".format(path, i, line))
                        i += 1
    output.close()

I divided it into two functions - search, where I can check where result file is existed and remove it, and then step for os.path.walk. Param is a folder to search in.

How can this code be adjusted to look better?