PythonDatetime.date类的weekday()函数

datetime.date 类函数的weekday()用于返回与指定的星期几对应的整数值。

Syntax: weekday()

Parameters: This function does not accept any parameter.

Return values: This function returns the integer mapping corresponding to the specified day of the week. Below table shows the integer values corresponding to the day of the week.

Integer returned by weekday() function	Day of the week
0	Monday
1	Tuesday
2	Wednesday
3	Thursday
4	Friday
5	Saturday
6	Sunday

示例 1：获取一周中指定天数对应的整数值。

Python3

# Python3 code for getting
# integer value corresponding
# to the specified day of the week
 
# Importing datetime module
import datetime
 
# Specifying some date and time values
dateTimeInstance1 = datetime.datetime(2021, 8, 1, 00, 00, 00)
dateTimeInstance2 = datetime.datetime(2021, 8, 2, 00, 00, 00)
dateTimeInstance3 = datetime.datetime(2021, 8, 3, 00, 00, 00)
 
# Calling the weekday() functions over the
# above dateTimeInstances
dayOfTheWeek1 = dateTimeInstance1.weekday()
dayOfTheWeek2 = dateTimeInstance2.weekday()
dayOfTheWeek3 = dateTimeInstance3.weekday()
 
# Getting the integer value corresponding
# to the specified day of the week
print(dayOfTheWeek1)
print(dayOfTheWeek2)
print(dayOfTheWeek3)

输出：

6
0
1

示例 2：获取日期和时间以及整周的日期名称。

蟒蛇3

# Python3 code for getting
# integer value corresponding
# to the specified day of the week.
 
# Importing datetime module
import datetime
 
# Mapping of the week day
weekDaysMapping = ("Monday", "Tuesday",
                   "Wednesday", "Thursday",
                   "Friday", "Saturday",
                   "Sunday")
 
# Specifying a date and time value
dateTimeInstance = datetime.datetime(2021, 8, 2,
                                     00, 00, 00)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[dateTimeInstance.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(dateTimeInstance, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=3)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=4)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=5)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=6)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=7)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))
 
# Getting on next day
nextDay = dateTimeInstance.replace(day=8)
 
# Calling the weekday() function over the above
# specified weekday and data time value
dayOfTheWeek = weekDaysMapping[nextDay.weekday()]
 
# Printing the date and time along with the
# corresponding week day name
print("{} is for {}".format(nextDay, dayOfTheWeek))

输出：

2021-08-02 00:00:00 is for Monday
2021-08-03 00:00:00 is for Tuesday
2021-08-04 00:00:00 is for Wednesday
2021-08-05 00:00:00 is for Thursday
2021-08-06 00:00:00 is for Friday
2021-08-07 00:00:00 is for Saturday
2021-08-08 00:00:00 is for Sunday