def count(self, decomp=True, sep='/', pos=0):
''' 统计list各个原子的freq; 返回一级list; 默认指定decomp:简化键为汉字 '''
self.decomp = decomp # 记录key的索引特征
temp = simplify(self.list) # list结构降维至词一级
cnt = 0 # 数量校验; @ADD:3/26 当decomp=True时，可能出现异常
self.size = len(temp)
for w in temp:
if w not in self.freq.keys(): # 仅统计一次
key = w
if decomp:
try: key = w.split(sep)[pos]
except Exception,err_info: print 'Key decomposition Error',err_info,w,key
self.freq[key]=temp.count(w) # 使用list的count()
cnt += int(self.freq[key])
print "coun::CHECK: \nlist_size:%d =? count()_size:%d" % (len(temp),cnt)
return
def context(self, decomp=True):
''' 统计目标词的上下词序列|不含POS,含目标词 '''
if len(self.PMIwords)==0 : return None
pmiw = set(self.PMIwords) # ([ w for w in self.PMIwords if w in self.freq.keys() ])
for w in pmiw: # 初始化
self.content[w]=[]
sentences = simplify(self.list,True,1) # 将文档集降维至句子集
if decomp: # 文件中有POS，需要清洗
for i in range(len(sentences)): # 清洗掉POS部分，仅保留汉字
l = sentences[i]
if len(l)>0:
sentences[i] = [ w.split('/')[0] for w in l if w.find('/')!=-1 ]
#return sentences
for line in sentences:
for w in set(line).intersection(pmiw): # 交集
wid = line.index(w)
beg = wid-self.window
if beg<0 : beg = 0
end = wid+self.window+1 # +1：不包含词本身
if end>len(line) : end = len(line)
self.content[w].extend(line[beg:end]) # 加入上下文;统一放在置于一个list中
return None
