otp.ulong

class ulong(value, *args, **kwargs)

OneTick data type representing unsigned long integer.

The size of the type is not specified and may vary across different systems. Most commonly it’s a 8-byte type with allowed values from 0 to 2**64 - 1.

Note that the value is checked to be valid in constructor, but no overflow checking is done when arithmetic operations are performed.

Examples

>>> t = otp.Tick(A=otp.ulong(1))
>>> t['B'] = otp.ulong(1) + 1
>>> t.schema
{'A': <class 'onetick.py.types.ulong'>, 'B': <class 'onetick.py.types.ulong'>}

Note that arithmetic operations may result in overflow. Here we get 2**64 - 1 instead of -1.

t = otp.Tick(A=otp.ulong(0) - 1)
df = otp.run(t)
print(df)

        Time                     A
0 2003-12-01  18446744073709551615