Convert .net / C# time ticks to posix or python datetime

gistfile1.txt

'''
Convert .net-style ticks to posix or python datetime.
.net ticks (like in C#) are 100 nanosecond counts
starting from january 1st in year 0001
This one is not very thorougly tested but worked for me when I needed it.
'''
import datetime

_epoch = datetime.date(1970, 1 , 1)
_dotnet_minvalue = datetime.date(1, 1, 1)
_offset = (_epoch - _dotnet_minvalue).total_seconds()
_ten_million = 10000000

def ticks_to_posix(dotnet_ticks):
    seconds = dotnet_ticks / _ten_million;
    posix =  seconds - _offset
    return posix

def ticks_to_datetime(dotnet_ticks):
    posix = ticks_to_posix(dotnet_ticks)
    return datetime.datetime.fromtimestamp(posix)

# demo
dotnet_ticks = 637074993332500000
print("dotnet_ticks: ", dotnet_ticks)
print("posix: ", ticks_to_posix(dotnet_ticks))
print("datetime: ", ticks_to_datetime(dotnet_ticks))