本文整理汇总了Python中kyotocabinet.DB.count方法的典型用法代码示例。如果您正苦于以下问题：Python DB.count方法的具体用法？Python DB.count怎么用？Python DB.count使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类kyotocabinet.DB的用法示例。
在下文中一共展示了DB.count方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: db_meta_info
# 需要导入模块: from kyotocabinet import DB [as 别名]
# 或者: from kyotocabinet.DB import count [as 别名]
def db_meta_info():
meta = {}
db = DB()
db_file = current_app.config['DB_FILE']
if not db.open("{0}".format(db_file), DB.OREADER):
print "Could not open database (meta info)."
meta["size"] = db.size()
meta["count"] = db.count()
db.close()
return meta示例2: FeatureSelector
# 需要导入模块: from kyotocabinet import DB [as 别名]
# 或者: from kyotocabinet.DB import count [as 别名]
#.........这里部分代码省略.........
if self._len_x is None:
self._len_x = len(x);
assert self._len_x == len(x);
row = c + b + x;
if Frontend.train( self, row ):
return True;
keyfmt = '>IIIII';
for i in range( 0, self._lenrow ):
for j in range( 0, self._lenrow ):
if ( i >= j ) and ( not ( i == self._lenrow-1 ) ):
continue;
key = pack( keyfmt, i, j, y, row[i], row[j] );
try:
assert self._kdb.increment( key, 1, 0 );
except:
print( str(self._kdb.error()) );
raise;
def _stats( self, cnt_by_a, cnt_by_b, cnt_by_ab ):
h_a = 0.0;
h_b = 0.0;
h_ab = 0.0;
for ( val_a, cnt ) in cnt_by_a.items():
p = float(cnt) / float(self._rowcount);
if p > 0.0:
h_a -= p * log( p, 2.0 );
for ( val_b, cnt ) in cnt_by_b.items():
p = float(cnt) / float(self._rowcount);
if p > 0.0:
h_b -= p * log( p, 2.0 );
for( (val_a,val_b), cnt ) in cnt_by_ab.items():
p = float(cnt) / float(self._rowcount);
if p > 0.0:
h_ab -= p * log( p, 2.0 );
if h_a == 0.0:
return 1.0;
if h_b == 0.0:
return 1.0;
mi = h_a + h_b - h_ab;
return ( mi / min( h_a, h_b ), h_a, h_b, h_ab, mi );
def _get_info_content_by_dimension( self, i ):
keyfmt = '>IIIII';
valfmt = '>Q';
j = None;
cnt_by_a = {};
cnt_by_b = {};