try: import btree import uio import uerrno except ImportError: print("SKIP") raise SystemExit # f = open("_test.db", "w+b") f = uio.BytesIO() db = btree.open(f, pagesize=512) mv = memoryview(b"bar1foo1") db[b"foo3"] = b"bar3" db[b"foo1"] = b"bar1" # any type that implements buffer protocol works for key and value db["foo2"] = "bar2" db[mv[:4]] = mv[4:] dbstr = str(db) print(dbstr[:7], dbstr[-1:]) print(db[b"foo2"]) try: print(db[b"foo"]) except KeyError: print("KeyError") print(db.get(b"foo")) print(db.get(b"foo", b"dflt")) del db[b"foo2"] try: del db[b"foo"] except KeyError: print("KeyError") for k, v in db.items(): print((k, v)) print("---") for k, v in db.items(None, None): print((k, v)) print("---") for k, v in db.items(b"f"): print((k, v)) print("---") for k, v in db.items(b"f", b"foo3"): print((k, v)) print("---") for k, v in db.items(None, b"foo3"): print((k, v)) print("---") for k, v in db.items(b"f", b"foo3", btree.INCL): print((k, v)) print("---") for k, v in db.items(None, None, btree.DESC): print((k, v)) print(db.seq(1, b"foo1")) print(db.seq(1, b"qux")) try: db.seq(b"foo1") except OSError as e: print(e.errno == uerrno.EINVAL) print(list(db.keys())) print(list(db.values())) for k in db: print(k) db.put(b"baz1", b"qux1") print("foo1", "foo1" in db) print("foo2", "foo2" in db) print("baz1", "baz1" in db) try: print(db + db[b"foo1"]) except TypeError: print("TypeError") db.flush() db.close() f.close()