import re

RE_FILE_NAME = r'Python_Lesson2\Lesson5\file.txt'
OUTPUT = 'results.txt'

try:
    with open(RE_FILE_NAME, 'r') as file2read:
        content = file2read.read()
except Exception as err:
    print(err)
else:
    matches = re.finditer(r"(?:([A-Z])_)?\d{2}w(\d{1,2})\.\d-\d+-\d+", content)
    for i in matches:
        print('Build {} from week {} on branch {}'.format(i.group(0),
         i.group(2), i.group(1) if i.group(1) else 'master'))