PureCTypes is a pure-python package to describe portable C structures.
The standard ctypes Python module can also be used to described C structures, but they are mapped to the current process ABI.
This means that it isn't possible, for instance, to describe a structure packed for the Windows 32-bit ABI while running under Linux. This can be very useful for people that want to analyze memory gathered from a system A on another system B offline, or for exploit development.
purectypes structures are not meant to be written by hand, and are better generated by an automatic tool.
DragonFFI provides the ability to
generate purectypes structures from a C one, for a given ABI. This makes the
generated structures tied to the ABI of the process that ran
DragonFFI.