if not options['flatnode_file'] and options['osm2pgsql_cache'] == 0:
# Make some educated guesses about cache size based on the size
# of the import file and the available memory.
- mem = psutil.virtual_memory() # type: ignore[no-untyped-call]
+ mem = psutil.virtual_memory()
fsize = 0
if isinstance(osm_files, list):
for fname in osm_files: