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import time
import datetime
import numpy as np
#n = len(X_train['create_time'])
#np.zeros(n,dtype = np.int32)
####################单个转换时间戳为时间
def changetime(x):
? ? timeArray = time.localtime(x)
? ? otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
? ? return(otherStyleTime)
####################一列转换成距离当前日期的天数
def nchangetime(x):
? ? n = len(x)
? ? now = int(time.time())
? ? nowtime = changetime(now)
? ? d1 = datetime.datetime.strptime(nowtime, '%Y-%m-%d %H:%M:%S')
? ? b = np.zeros(n,dtype=int)
? ? for i in range(n):
? ? ? ? xx = changetime(x[i])
? ? ? ? d2 = datetime.datetime.strptime(xx, '%Y-%m-%d %H:%M:%S')
? ? ? ? l = (d1-d2).days
? ? ? ? b[i] = l
? ? return(b)
########转换一列日期数据
X_train['date'].map(changetime)
########转换成距离当前日期的天数
nchangetime(X_train['date'])
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