read_file_line_by_line.py

            
def read_file_line_by_line(filename, pattern):
    if not filename.endswith('.kt') and not filename.endswith('.java') and not filename.endswith('.xml'):
        print(f' Invalid file. filename is {filename}')
        return
    
    try:
        with open(filename, 'r', encoding='UTF-8') as file:
            while (line := file.readline().rstrip()):
                 print(line)
    except:
        print(filename)