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from kyotocabinet import *
import sys
# define the functor
def dbproc(db):
# store records
db[b'foo'] = b'step'; # bytes is fundamental
db['bar'] = 'hop'; # string is also ok
db[3] = 'jump'; # number is also ok
# retrieve a record value
print("{}".format(db['foo'].decode()))
# update records in transaction
def tranproc():
db['foo'] = 2.71828
return True
db.transaction(tranproc)
# multiply a record value
def mulproc(key, value):
return float(value) * 2
db.accept('foo', mulproc)
# traverse records by iterator
for key in db:
print("{}:{}".format(key.decode(), db[key].decode()))
# upcase values by iterator
def upproc(key, value):
return value.upper()
db.iterate(upproc)
# traverse records by cursor
def curproc(cur):
cur.jump()
def printproc(key, value):
print("{}:{}".format(key.decode(), value.decode()))
return Visitor.NOP
while cur.accept(printproc):
cur.step()
db.cursor_process(curproc)
# process the database by the functor
DB.process(dbproc, 'casket.kch')
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