python日期识别
通过jieba切分语句，根据词性提取时间，再利用正则表达式匹配日期，最后输出识别日期。
可以识别：今天几号？上周一的时间是？27号到30号？15号？我要订今天到后天的房间。从2019年4月28号下午3时10分27秒到2019年5月4号。前天上午12点等。
识别的结果受jieba分词的影响，如果想要效果更好，可以自己用HMM训练分词，用双向匹配分词，条件随机场，神经网络等根据自己的需求训练自己的分词。
#!/usr/bin/python3
# -*- coding: utf-8 -*-
# author:SingWeek
import re
from datetime import datetime,timedelta
from dateutil.parser import parse
import jieba.posseg as psg
UTIL_CN_NUM={'零':0,'一':1,'二':2,'三':3,'四':4,'五':5,'六':6,'七':7,'八':8,'九':9,'0':0,'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7,'8':8,'9':9}
UTIL_CN_UNIT={'十':10,'百':100,'千':1000,'万':10000}
def get_lastweek(day=1):
d = datetime.now()
dayscount = timedelta(days=d.isoweekday())
dayto = d - dayscount
sixdays = timedelta(days=7-day)
dayfrom = dayto - sixdays
date_from = datetime(dayfrom.year, dayfrom.month, dayfrom.day, 0, 0, 0)
return str(date_from)[0:4]+'年'+str(date_from)[5:7]+'月'+str(date_from)[8:10]+'日'
def get_nextweek(day=1):
d = datetime.now()
dayscount = timedelta(days=d.isoweekday())
dayto = d - dayscount
sixdays = timedelta(days=-7-day)
dayfrom = dayto - sixdays
date_from = datetime(dayfrom.year, dayfrom.month, dayfrom.day, 0, 0, 0)
return str(date_from)[0:4]+'年'+str(date_from)[5:7]+'月'+str(date_from)[8:10]+'日'
def get_week(day=1):
d = datetime.now()
dayscount = timedelta(days=d.isoweekday())
dayto = d - dayscount
sixdays = timedelta(days=-day)
dayfrom = dayto - sixdays
date_from = datetime(dayfrom.year, dayfrom.month, dayfrom.day, 0, 0, 0)
return str(date_from)[0:4]+'年'+str(date_from)[5:7]+'月'+str(date_from)[8:10]+'日'
def check_time_valid(word):
m=re.match("\d+$",word)
if m:
if len(word)<=6:
return None
word1=re.sub('[号|日]\d+$','日',word)
if word1!=word:
return check_time_valid(word)
else:
return word1
def cn2dig(src):
if src=="":
return None
m=re.match("\d+",src)
if m:
return int(m.group(0))
rsl=0
unit=1
for item in src[::-1]:
if item in UTIL_CN_UNIT.keys():
unit=UTIL_CN_UNIT[item]
elif item in UTIL_CN_NUM.keys():
num=UTIL_CN_NUM[item]
rsl+=num*unit
else:
return None
if rsl