In [28]:

    

from datetime import datetime
import time
from matplotlib.dates import date2num


    

In [39]:

    

datetime_object = datetime(2015, 8, 7)
date_str = datatime_object.strftime("%Y-%m-%d") # %Y-%m-%d %H:%M:%S
date_str # string type


    

    
Out[39]:





'2015-08-07'

In [41]:

    

datetime(2015, 8, 7).strftime("%Y-%m-%d") # datetime(2015, 8, 7, 20,6,39)


    

    
Out[41]:





'2015-08-07'

In [49]:

    

string = "2015-08-05"
datetime.strptime(string, "%Y-%m-%d")


    

    
Out[49]:





datetime.datetime(2015, 8, 5, 0, 0)

In [46]:

    

string = "2015-08-05 17:50:30"
datetime.strptime(string, "%Y-%m-%d %H:%M:%S")


    

    
Out[46]:





datetime.datetime(2015, 8, 5, 17, 50, 30)

In [50]:

    

date2num(datetime.strptime("2015-08-05","%Y-%m-%d"))


    

    
Out[50]:





735815.0

In [51]:

    

time.mktime(time.strptime("2015-08-05","%Y-%m-%d"))


    

    
Out[51]:





1438700400.0