Python – Generate k random dates between two other dates
Given two dates, the task is to write a Python program to get K dates randomly.
Input : test_date1, test_date2 = date(2015, 6, 3), date(2015, 7, 1), K = 7
Output : [datetime.date(2015, 6, 18), datetime.date(2015, 6, 25), datetime.date(2015, 6, 29), datetime.date(2015, 6, 11), datetime.date(2015, 6, 11), datetime.date(2015, 6, 10), datetime.date(2015, 6, 24)]
Explanation : 7 random dates starting from 3 June 2015 to 1 July 2015 are generated.
Input : test_date1, test_date2 = date(2015, 6, 3), date(2015, 8, 1), K = 6
Output : [datetime.date(2015, 6, 20), datetime.date(2015, 7, 22), datetime.date(2015, 6, 29), datetime.date(2015, 6, 18), datetime.date(2015, 6, 13), datetime.date(2015, 7, 14)]
Explanation : 6 random dates starting from 3 June 2015 to 1 August 2015 are generated.
Method #1 : Using choices() + loop + timedelta()
In this, we extract all dates in range using loop and timedelta() of 1-day difference. Among them K random dates are chosen using choices().
Python3
# Python3 code to demonstrate working of# Random K dates in Range# Using choices() + timedelta() + loopfrom datetime import date, timedeltafrom random import choices # initializing dates ranges test_date1, test_date2 = date(2015, 6, 3), date(2015, 7, 1) # printing dates print("The original range : " + str(test_date1) + " " + str(test_date2)) # initializing KK = 7 res_dates = [test_date1] # loop to get each date till end datewhile test_date1 != test_date2: test_date1 += timedelta(days=1) res_dates.append(test_date1) # random K dates from packres = choices(res_dates, k=K) # printing print("K random dates in range : " + str(res)) |
Output:
The original range : 2015-06-03 2015-07-01
K random dates in range : [datetime.date(2015, 6, 25), datetime.date(2015, 6, 10), datetime.date(2015, 6, 18), datetime.date(2015, 6, 7), datetime.date(2015, 6, 4), datetime.date(2015, 6, 16), datetime.date(2015, 6, 12)]
Method #2 : Using randrange() + timedelta() + loop
In this, a total number of days between ranges is extracted and that range is used to get elements K times, adding a random index number from start date extracted using randrange().
Python3
# Python3 code to demonstrate working of# Random K dates in Range# Using randrange() + timedelta() + loopfrom datetime import date, timedeltaimport random # initializing dates ranges test_date1, test_date2 = date(2015, 6, 3), date(2015, 7, 1) # printing dates print("The original range : " + str(test_date1) + " " + str(test_date2)) # initializing KK = 7 # getting days between datesdates_bet = test_date2 - test_date1total_days = dates_bet.days res = []for idx in range(K): random.seed(a=None) # getting random days randay = random.randrange(total_days) # getting random dates res.append(test_date1 + timedelta(days=randay)) # printing print("K random dates in range : " + str(res)) |
Output:
The original range : 2015-06-03 2015-07-01
K random dates in range : [datetime.date(2015, 6, 26), datetime.date(2015, 6, 5), datetime.date(2015, 6, 6), datetime.date(2015, 6, 18), datetime.date(2015, 6, 21), datetime.date(2015, 6, 15), datetime.date(2015, 6, 12)]
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