Convert JSON date list to python date format-CodePudding

I've got this list of birthdate that is in JSON format, that I want to convert to Python format. What would be the easiest way to convert to python date format?

print(birthdate_json[:5])

gives me the following results :

['/Date(1013230800000)/', '/Date(1016600400000)/', '/Date(1010466000000)/', '/Date(1017205200000)/', '/Date(1020052800000)/']

While I would the desired input to be :

'2002-02-09', '2002-03-20', '2002-01-08', '2002-03-27', '2002-04-29'

CodePudding user response：

You can use datetime.fromtimestamp() in datetime module to convert epochtime to datetime, as follows:

from datetime import datetime

birthdate_json = [
    '/Date(1013230800000)/',
    '/Date(1016600400000)/',
    '/Date(1010466000000)/',
    '/Date(1017205200000)/',
    '/Date(1020052800000)/'
]
birthdate = []
for i in range(len(birthdate_json)):
    epoch_time = int(birthdate_json[i][6:-2])/1000
    datetime_type_value = datetime.fromtimestamp(epoch_time)
    # uncomment next line If you want str value of datetime such as ["2022-02-23", "2022-02-24" ...]
    # datetime_type_value = datetime_type_value.strftime("%F")
    birthdate.append(datetime_type_value)

print(birthdate)

# datetime type values will be printed:
# [datetime.datetime(2002, 2, 9, 14, 0), datetime.datetime(2002, 3, 20, 14, 0), datetime.datetime(2002, 1, 8, 14, 0), datetime.datetime(2002, 3, 27, 14, 0), datetime.datetime(2002, 4, 29, 13, 0)]

CodePudding user response：

One of the approaches to solve your problem is to use a list comprehension such as:

from datetime import datetime
import re
# Your code to extract data from JSON file and assign them to `birthdate_json` variable
[datetime.fromtimestamp(float((re.search("Date\((. )\)",x).group(1)))/1000).strftime("%Y-%m-%d") for x in birthdate_json]

which regarding the example of birthdate_json[:5] would result in:

['2002-02-09', '2002-03-20', '2002-01-08', '2002-03-27', '2002-04-29']

CodePudding user response：

These times are in epoch milliseconds. You can convert them to a datetime object:

import datetime

x = datetime.datetime.fromtimestamp(int("1013230800000")/1000)
print(x.strftime("%F"))

>>> 2002-02-09