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Title Description
This question is to fill in the blanks , Just calculate the result , Use the output statement in the code to output the filled results .
Whole 2020 century （19011901 year 11 month 11 solstice 20002000 year 1212 month 3131 Between days ）, How many Mondays are there in all ？( Don't tell me you don't know what day it is today )
Operation limit
Maximum operation time ：1s
Maximum running memory : 128M
start = date(1901, 1, 1) -end = date(2001, 1, 1)start += temp# Time : 2022/2/13 22:56
# File : Monday .py
# Author : yes Dream ah ！
# VX : Xu18300396393
# Ten thousand times sad , There will still be Dream, I've been waiting for you in the warmest place ！
from datetime import *
start = date(1901, 1, 1) # 1901-01-01
# print(start)
end = date(2001, 1, 1)
temp = timedelta(days=1)
n = 0
while start != end:
if start.weekday() == 0:
n += 1
start += temp
print(n)
datetime Some uses of the module are as follows ：
from datetime import datetime
from datetime import timedelta
import time
# 1) Get the current date and time
now_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S") # At this time, the time is month, day, hour, minute and second
now_time = time.strftime("%Y-%m-%d %H:%M:%S") # At this time, the time is
today = datetime.today() # When returning the current time, every minute and second is 0
print(" current time ")
print(today)
today1 = datetime.now() # Returns the current date and time
now.hour # when
now.minute # branch
now.isoweekday（）# Back to 1-7 On behalf of the Monday -- Sunday ;
now.weekday（）# Back to 0-6 On behalf of the Monday -- By Sunday
# The standard format is %w 1-6 It means Monday -- Saturday ,0 On behalf of the Sunday
print( today1 )
today2 = datetime.utcnow() # The time to return to the current Dongba district is less than that at that time 8 Hours
print(today2)
# 2) Get the specified date and time , Add and subtract
time= datetime(2019, 5, 12, 12, 13, 14)
d= time + timedelta(weeks=0, days=0, hours=0, minutes=0, seconds=0, milliseconds=0, microseconds=0, )
# In turn " Zhou " " God ", " when "," branch "," second "," millisecond "," Microsecond "
print(time)
print(d)
time1= "2019-5-12 12:13:14" # character string date
d1 = datetime.strptime(str(time1),'%Y-%m-%d %H:%M:%S')
plus= d1 + timedelta(days=1) # Add
minus = d1 - timedelta(days=1) # reduce
print(time1)
print(d1)
print(plus)
print(minus )
time2= 20190512121314
d2 = datetime.strptime(str(time2),'%Y%m%d%H%M%S')
delta = d2 + timedelta(days=1)
print(time2)
print(d2 )
print(delta)
# 3) date datetime-timestamp Timestamps are transferred to each other
now_stamp = time.timestamp()
print(' Specify the time corresponding to the timestamp :', now_stamp)
print(' Corresponding to local time :', datetime.fromtimestamp(now_stamp ))
print('UTC Standard time :', datetime.utcfromtimestamp(now_stamp ))
print(' What day of the week :', datetime.fromtimestamp(now_stamp ).weekday())
# 4) datetime Time Convert to str character string
now = datetime.now()
print(' current time :', now)
print(now.strftime('%Y%m%d%H%M%S'))
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