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try:
import btree
import io
import errno
except ImportError:
print("SKIP")
raise SystemExit
# f = open("_test.db", "w+b")
f = io.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 == errno.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()
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