我在网上发现的一个获取当前时间python程序，但是星期几却少一天，怎么回事？

Question

import datetime
# Get a datetime object
now = datetime.datetime.now()
# General functions 
print ("Year: %d" % now.year)
print ("Month: %d" % now.month)
print ("Day: %d" % now.day)
print ("Weekday: %d" % now.weekday())
# Day of week Monday = 0, Sunday = 6
print ("Hour: %d" % now.hour)
print ("Minute: %d" % now.minute)
print ("Second: %d" % now.second)
print ("Microsecond: %d" % now.microsecond)
# ISO Functions
print ("ISO Weekday: %d" % now.isoweekday())
# Day of week Monday = 1, Sunday = 7
print ("ISO Format: %s" % now.isoformat())
# ISO format, e.g. 2010-12-24T07:10:52.458593
print ("ISO Calendar: %s" % str(now.isocalendar()))
# Tuple of (ISO year, ISO week number, ISO weekday)
# Formatted date
print (now.strftime("%Y/%m/%d"))

就是上面这段代码，在显示第四行weekday时，显示的是4，但今天是星期五。下面的ISOweekday却显示正确，请问是怎么回事？@兔兔RabbitMQ！！！

Answer 1

即使只是简单的代码

import datetime
day=datetime.datetime.now().weekday()
print(day)

显示的也是4。求教各位前辈