将 C_ulong_Array_40 转换为 python 中的列表或字符串？

Question

I'm trying to fight through some python code that interfaces with an hardware unit.

The unit have an python lib where I use an function called "readsub". But it returns the data in a format I get as "C_ulong_Array_40"

The code is simple:

err, length, data = card.ReadSub(2)
write_tofile(1, data)

But then I get the following error: unsupported operand types (s) for +: 'c_ulong_Array_40' and 'str'

I assume I need to use ctypes for something, but it's all a bit of "magic" right now since I'm not that good in python yet.

What way can I convert the "data" to some format usefull? it can either be to an python list or one long string containing all data.

Thanks, br. Martin

Answer 1

From what I just learnt C_ulong_Array_40 is a ctype array of datatype ulong with a length of 40.

FYI c_ulong is alias for c_uint , also c_long is alias for c_int https://docs.python.org/3/library/ctypes.html ).

To get your list of Integers;

list_of_ints = [x for x in data]

To get your list of Strings;

list_of_str_ints = [str(x) for x in data]

No strange conversions needed!