Minimal python tarfile module usage

tarfile-min-example.py

#!/usr/bin/env python
import io
import tarfile
a_content = '''
content:aaa
content:111
'''
b_content = '''
content:bbb
content:222
'''

def addBytesToTar(tar_, arcname:str, buf:bytes):
    tar_info = tarfile.TarInfo(arcname)
    tar_info.size = len(buf)
    return tar_.addfile(tar_info, io.BytesIO(buf))

def addTextFileToTar(tar_, arcname:str, s_:str):
    buf = s_.encode()
    return addBytesToTar(tar_, arcname, buf)

TarInfo = tarfile.TarInfo
with tarfile.open('a.tar', 'w|') as tar:
    addTextFileToTar(tar, 'a.txt', a_content)
    addTextFileToTar(tar, 'b.txt', b_content)