def append(i):
random.seed()
file('test.db', 'ab').write('% 3i %s\n' % (i, os.getpid()))
with LockedFile(central_file) as size_file:
current_value = int(size_file.read())
size_file.seek(0)
size_file.write('%i' % (i + current_value))
def __init__(self, filename, warn_on_readonly=True):
"""Initialize the class.
This will create the file if necessary.
"""
self._file = LockedFile(filename, 'r+b', 'rb')
self._thread_lock = threading.Lock()
self._read_only = False
self._warn_on_readonly = warn_on_readonly
self._create_file_if_needed()
# Cache of deserialized store. This is only valid after the
# _MultiStore is locked or _refresh_data_cache is called. This is
# of the form of:
#
# ((key, value), (key, value)...) -> OAuth2Credential
#
# If this is None, then the store hasn't been read yet.
self._data = None
