[Python] How to convert a really long timestamp into datetime (19 digits) (9876432101234567890)

I am trying to manage some mods for a game, and to do that I'm trying to decode the metadata file that comes with every mod, called meta.cpp https://community.bistudio.com/wiki/Arma_3_meta.cpp

/// Version of meta.cpp content
protocol = 1;
/// Steam Workshop item id
publishedid = 123456790;
/// Steam Workshop item name
name = "Splendid mod";
/// Time of last update of the Steam Workshop Item (in Unix time format)
timestamp = 9876432101234567890;
/// Mod hash that is send by the server to the client instead of calculated hash)
hashOverride = 1234567890;


now, the wiki states that the timestamp is in "unix time format" but i've never seen a 19 digit timestamp before, i know that,

for example, this date here: 5248381691709134656

converts into: 11 Aug, 2018 @ 7:55am

however, using a "unix time in nanoseconds" to date time converter, I get:

Wednesday, 25 April 2136 03:48:11.709

how can I, in python, get the correct datetime from that 19 digit timestamp?

Update, full code here:

import os, sys
from struct import pack, unpack
from datetime import datetime

dir = "C:/Users/Hobnob/Desktop/a"


def sick_timestamp_to_datetime(ts):
double_value, = unpack("d", ts.to_bytes((ts.bit_length() + 7) // 8, "big"))
return datetime.utcfromtimestamp(double_value * 1000000)

def datetime_to_sick_timestamp(dt):
double_value = dt.timestamp() / 1000000
return int.from_bytes(pack("d", double_value), "big")

def getMods(path):
mods = []
folders = os.listdir(path)
for folder in folders:
if folder[0] == "@":
f = open(dir + "/" + folder + "/" + "meta.cpp","r")
lines = f.readlines()
f.close()
mod = {}
mod["folder"] = folder
for line in lines:
l = line.replace(";\n","").split(" = ")
mod[l[0]] = l[1]
mods.append(mod)
return mods

mods = getMods(dir)

for mod in mods:

print(mod["name"])
timestamp = int(mod["timestamp"])
print(timestamp)
print(sick_timestamp_to_datetime(int(mod["timestamp"])))


Returns

"501st Map Pack v2"

5248711435420930091

1970-01-01 00:00:00

"A2 Declassified: Fireteam Zulu"

5248689294479321327

timestamp out of range for platform time_t
Stack trace:
> File "C:\Users\Hobnob\source\repos\modupdater\modupdater\modupdater.py", line 10, in sick_timestamp_to_datetime
> return datetime.utcfromtimestamp(double_value * 1000000)
> File "C:\Users\Hobnob\source\repos\modupdater\modupdater\modupdater.py", line 45, in <module>
> print(sick_timestamp_to_datetime(int(mod["timestamp"])))
Loaded '__main__'



https://pastebin.com/PM6GM0bL here is the full list of timestamps

"501st Map Pack v2"
5248711435420930091
"A2 Declassified: Fireteam Zulu"
5248689294479321327
"ace"
5248567866178789836
"ACE Extension - Attachment Switching"
5248293196869838307
"ACE Interaction Menu Expansion"
5248353067687941306
"ACE 3 Extension (Animations and Actions)"
5248367057664748391
"ACEX"
5248567868005486912
"Achilles"
5248652679121433871
"ADV - ACE Medical"
5248556573318018227
"Advanced Urban Rappelling"
5247735201687266573
"Advanced Rappelling"
5247762938166464462
"Advanced Sling Loading"
5247774176389108621
"BackpackOnChest"
5247950803847045667
"Bariga"
5248103043689999886
"CBA_A3"
5248723145042436614
"Chernarus Redux"
5248701460962875112
"cTab"
5248593656826007018
"CUP Terrains - Core"
5248586602008770300
"CUP Terrains - CWA"
5248586583814180413
"CUP Terrains - Maps"
5248586587369758004
"CZ75 Ambient Music"
5248101810620391503
"Enhanced Movement"
5248301739023854775
"Fletcher's Section 3 Declassified"
5248426533389705768
"Full Halo Music Pack"
5248581288006497593
"GRAD Trenches"
5248704472075201653
"HEV Patch"
5248670178536489949
"@HossSFX"
5248185113942384632
"Ihantala Winter"
5248630560826935325
"Lesh's Towing Mod"
5248599604131388953
"Madrigal Terrain - Operation Trebuchet"
5248733653744790207
"MCC Sandbox 4 - Mission Making The Easy Way"
5248645695274158809
"OPCAN 2.0 by LM mods"
5248401400168196805
"Operation: Arsenal Expansion for OPTRE"
5248730766708129383
"Operation: TREBUCHET"
5248603069875536903
"Operation: TREBUCHET ACE Compat"
5248376212550867197
"Operation: TREBUCHET First Contact"
5248473794045345616
"OPTRE Plus - Operation Trebuchet+"
5248647342224736589
"Pulau"
5248569532565546274
"Remove stamina - ACE 3"
5248391666542436225
"Remove stamina"
5247824615698862513
"Ruha"
5248715949612612608
"Saint Kapaulio"
5248656593080042266
"ShackTac User Interface"
5248685384579272109
"SpecWar Gru 7 Official Mod Pack"
5248708196766508739
"@SurvivableCrashes"
5248194876544700239
"Tactical Weapon Swap"
5248560002828336128
"task_force_radio"
5248649840653578614
"TF Dust Storm Menu"
5248127215316370816
"TF Snow Storm Menu"
5248265470088709854
"USS Nimitz"
5248381691709134656
"Vana - Loadout Management (Alpha)"
5248229446545023209
"Vcom AI V3.3.3"
5248675353813691382
"VT5 - Valtatie 5 | Final Release | Finnish terrain for A3"
5247792698550562340
"@xCam_Taunus"
5247879225408317229
"Zombies and Demons"
5248001900987810777

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