python datetime timestamp

做开发中难免时间类型之间的转换， 最近就发现前端js和后端django经常要用到这个转换， 其中jsDate.now()精确到毫秒，而Python中Datetime.datetime.now()是精确到微秒的。

Convert datetime to timestamp

from datetime import datetime
import time
dt = datetime(2017,12,27,15,49)
ts = time.mktime(dt.timetuple())
print ts

1. 字符串日期时间转换成时间戳

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# '2015-08-28 16:43:37.283' --> 1440751417.283  
# 或者 '2015-08-28 16:43:37' --> 1440751417.0  
def string2timestamp(strValue):  
  
    try:          
        d = datetime.datetime.strptime(strValue, "%Y-%m-%d %H:%M:%S.%f")  
        t = d.timetuple()  
        timeStamp = int(time.mktime(t))  
        timeStamp = float(str(timeStamp) + str("%06d" % d.microsecond))/1000000  
        print timeStamp  
        return timeStamp  
    except ValueError as e:  
        print e  
        d = datetime.datetime.strptime(str2, "%Y-%m-%d %H:%M:%S")  
        t = d.timetuple()  
        timeStamp = int(time.mktime(t))  
        timeStamp = float(str(timeStamp) + str("%06d" % d.microsecond))/1000000  
        print timeStamp  
        return timeStamp  

2. 时间戳转换成字符串日期时间

[python] view plain copy

# 1440751417.283 --> '2015-08-28 16:43:37.283'  
def timestamp2string(timeStamp):  
    try:  
        d = datetime.datetime.fromtimestamp(timeStamp)  
        str1 = d.strftime("%Y-%m-%d %H:%M:%S.%f")  
        # 2015-08-28 16:43:37.283000'  
        return str1  
    except Exception as e:  
        print e  
        return ''