import re
_settings = None
-if os.environ.get('HOME') != None:
+if os.environ.get('HOME') is not None:
default_config_file = os.environ['HOME'] + '/.config/arvados/settings.conf'
else:
default_config_file = ''
+KEEP_BLOCK_SIZE = 2**26
EMPTY_BLOCK_LOCATOR = 'd41d8cd98f00b204e9800998ecf8427e+0'
def initialize(config_file=default_config_file):