Joining CSVs rough way

main.py

from modules.modules import CsvRepository, FileResource


def read_and_write(source_file: str, f, rm_header: bool):
    line_counter = 0
    with open(source_file) as f_in:
        for line in f_in:
            if rm_header:
                if line_counter != 0:
                    f.write(line)
                line_counter += 1
            else:
                f.write(line)


if __name__ == '__main__':
    repo = CsvRepository(FileResource.get_resource_filename('data_Q2_2017/2017-*.csv'))
    print(repo.matching_files)
    print(len(repo.matching_files))

    with open(FileResource.get_resource_filename('data_Q2_2017/out.csv'), 'w') as f:
        for i, in_file in enumerate(repo.matching_files):
            if i == 0:
                remove_header = False
            else:
                remove_header = True
            read_and_write(in_file, f, remove_header)

modules.modules.py

import glob

class CsvRepository(object):
    def __init__(self, path_pattern: str, recursive: bool = True):
        self._path_pattern = path_pattern
        self._recursive = recursive
        self._matching_files = None

    @property
    def matching_files(self) -> List[str]:
        if self._matching_files is None:
            self._matching_files = glob.glob(self._path_pattern, recursive=self._recursive)

        return self._matching_files
      
     
class FileResource(object):
    @staticmethod
    def get_resource_filename(filename: str) -> str:
        return resource_filename(Resources.__module__, filename)

    @staticmethod
    def get_test_resource_filename(filename: str) -> str:
        return resource_filename(TestResources.__module__, filename)
    

resources.resources.py

class Resources(object):
    pass