def main(argv):
if not (4 <= len(argv) <= 5):
usage()
return BAD_ARGS
dbname, verb, key, value = (argv[1:] + [None])[:4]
if verb not in ['get', 'set', 'delete']:
usage()
return BAD_VERBS
db = dbdb.connect(dbname) # CONNECT
try:
if verb == "get":
sys.stdout.write(db[key]) # Get Value
elif verb == "set":
db[key] = value
db.commit()
else:
del db[key]
db.commit()
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
return OK
def test_persistence(self):
db = dbdb.connect(self.tempfile_name)
db["b"] = "bye"
db["a"] = "aye"
db["c"] = "cye"
db.commit()
db["d"] = "dye"
eq_(len(db), 4)
db.close()
db = dbdb.connect(self.tempfile_name)
eq_(db["a"], "aye")
eq_(db["b"], "bye")
eq_(db["c"], "cye")
with assert_raises(KeyError):
db["d"]
eq_(len(db), 3)
db.close()
def test_persistence(self):
db = dbdb.connect(self.tempfile_name)
db['b'] = 'bee'
db['a'] = 'aye'
db['c'] = 'see'
db.commit()
db['d'] = 'dee'
eq_(len(db), 4)
db.close()
db = dbdb.connect(self.tempfile_name)
eq_(db['a'], 'aye')
eq_(db['b'], 'bee')
eq_(db['c'], 'see')
with assert_raises(KeyError):
db['d']
eq_(len(db), 3)
db.close()
def use(dbname, verb, key, value=None):
if verb not in {'get', 'set', 'delete'}:
usage()
return BAD_VERB
db = dbdb.connect(dbname)
try:
if verb == 'get':
sys.stdout.write(db[key])
elif verb == 'set':
db[key] = value
db.commit()
else:
del db[key]
db.commit()
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
return OK
def main():
if not (4 <= len(sys.argv) <= 5):
usage()
return BAD_ARGS
dbname, verb, key, value = (sys.argv[1:] + [None])[:4]
if verb not in ('get', 'set'):
usage()
return BAD_VERB
db = dbdb.connect(dbname)
if verb == 'get':
try:
sys.stdout.write(db[key])
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
else:
db[key] = value
db.commit()
return OK
def main(argv):
if not (4 <= len(argv) <= 5):
usage()
return BAD_ARGS
dbname, verb, key, value = (argv[1:] + [None])[:4]
if verb not in {'get', 'set', 'delete'}:
usage()
return BAD_VERB
db = dbdb.connect(dbname)
try:
if verb == 'get':
sys.stdout.write(db[key]) #等价于print,但不换行
elif verb == 'set':
db[key] = value
db.commit()
else:
del db[key]
db.commit()
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
return OK
def main(argv):
if not ( 4 <= len(argv) <= 5):
usage()
return BAD_ARGS
dbname, verb, key, value = (argv[1:] + [None])[:4]
if verb not in [ "get", "set", "delete" ]:
usage()
return BAD_VERB
db = dbdb.connect(dbname)
try:
if verb == "get":
sys.stdout.write(db[key])
elif verb == "set":
db[key] = value
db.commit
else:
del db[key]
db.commit
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
return OK
def main(argv):
if not (4 <= len(argv) <= 5):
usage()
return BAD_ARGS
dbname, verb, key, value = (
argv[1:] +
[None])[:4] # (DBNAME, get, Key, VALUE) None是有可能用get，delete时无value
if verb not in {'get', 'set', 'delete'}:
usage()
return BAD_VERB
db = dbdb.connect(dbname) # import dbdb from dbdb.__init__.py
try:
if verb == 'get':
sys.stdout.write(db[key])
elif verb == 'set':
db[key] = value
db.commit()
else:
del db[key]
db.commit()
except KeyError:
print("Key not found", file=sys.stderr)
return BAD_KEY
return OK
def test_new_database_file(self):
db = dbdb.connect(self.new_tempfile_name)
db['a'] = 'aye'
db.commit()
db.close()
def test_new_database_file(self):
db = dbdb.connect(self.new_tempfile_name)
db["a"] = "aye"
db.commit()
db.close()
def init_db(app):
db = dbdb.connect(app.config["DATABASE"])
return db
