How to convert complex nested Ctypes Union and structure in Python

Question

How to convert it to Python?

The code below is a complex nested Union and Struct. Its very easy to convert to Python incorrectly.

typedef struct { unsigned char enable; unsigned short x; unsigned short y; unsigned char local; unsigned char em; unsigned char tr; short at; unsigned char reserved[6]; } IRF_SPOT; typedef union strSAVEDATA { struct { uint32_t crc; uint8_t ver; uint8_t id; uint8_t baudrate; int16_t level; uint16_t span; uint8_t tv; uint8_t agc; uint8_t invert; uint8_t mirror; uint8_t flip; uint8_t colorbar; uint8_t showinfo; uint8_t indicator; uint8_t unit; uint8_t dhcp; uint8_t color; uint8_t alpha; uint8_t zoom; uint8_t sharp; uint8_t noise; // new uint16_t nuc; uint32_t ipaddr; uint32_t netmask; uint32_t gateway; uint32_t dns; uint8_t alarm1_func; // new uint8_t alarm1_cond; // new uint16_t alarm1_value; // new uint8_t alarm2_func; // new uint8_t alarm2_cond; // new uint16_t alarm2_value; // new uint8_t temp_mode; // reserved uint8_t down_filter; // reserved uint8_t show_center; uint8_t show_spot; uint8_t show_correction; uint8_t show_isotherm; uint8_t reserved1[70]; uint8_t limit9; uint8_t enable_high; uint8_t correction; uint8_t emissivity; uint8_t transmission; int16_t atmosphere; struct { uint8_t enable; uint16_t x; uint16_t y; uint8_t local; uint8_t em; uint8_t tr; int16_t at; uint8_t reserved[6]; } spot[10]; struct { uint8_t enable; uint32_t seed_color; int16_t top; int16_t bottom; uint8_t reserved[3]; } iso[3]; }; char padding[512]; } IRF_SAVEDATA_T; typedef struct { unsigned short* ir_image; DWORD image_buffer_size; LPBYTE lpNextData; DWORD dwSize; DWORD dwPosition; IRF_MESSAGE_TYPE_T msg_type; IRF_SAVEDATA_T save_data; unsigned int fw_ver; unsigned short PMSGTYPE; // Primary Message Type Code unsigned short RCODE; // Response Code } IRF_IR_CAM_DATA_T; 

It is so complicated. I use this to connect an internet camera, but the camera does not respond to the message. Please teach me how to convert it correctly.

My Python code is:

 class spot(Structure): _fields_ = [ ('enable',wintypes.c_uint8), ('x',wintypes.c_uint16), ('y',wintypes.c_uint16), ('local',wintypes.c_uint8), ('em',wintypes.c_uint8), ('tr',wintypes.c_uint8), ('at',wintypes.c_uint16), ('reserved',wintypes.c_uint8*6) ] class iso(Structure): _fields_ = [ ('enable',wintypes.c_uint8), ('seed_color',wintypes.c_uint32), ('top',wintypes.c_int16), ('bottom',wintypes.c_int16), ('reserved',wintypes.c_uint8) ] class strSAVEDATA(Structure): _fields_ = [ ('crc',wintypes.c_uint32), ('ver',wintypes.c_uint8), ('id',wintypes.c_uint8), ('baudrate',wintypes.c_uint8), ('level',wintypes.c_int16), ('span',wintypes.c_uint16), ('tv',wintypes.c_uint8), ('agc',wintypes.c_uint8), ('invert',wintypes.c_uint8), ('mirror',wintypes.c_uint8), ('flip',wintypes.c_uint8), ('colorbar',wintypes.c_uint8), ('showinfo',wintypes.c_uint8), ('indicator',wintypes.c_uint8), ('unit',wintypes.c_uint8), ('dhcp',wintypes.c_uint8), ('color',wintypes.c_uint8), ('alpha',wintypes.c_uint8), ('zoon',wintypes.c_uint8), ('sharp',wintypes.c_uint8), ('noise',wintypes.c_uint8), ('nuc',wintypes.c_uint16), ('ipaddr',wintypes.c_uint32), ('netmask',wintypes.c_uint32), ('gatway',wintypes.c_uint32), ('dns',wintypes.c_uint32), ('alarm1_func',wintypes.c_uint8), ('alarm1_cond',wintypes.c_uint8), ('alarm1_value',wintypes.c_uint16), ('alarm2_func',wintypes.c_uint8), ('alarm2_cond',wintypes.c_uint8), ('alarm2_value',wintypes.c_uint16), ('temp_mode',wintypes.c_uint8), ('down_filter',wintypes.c_uint8), ('show_center',wintypes.c_uint8), ('show_spot',wintypes.c_uint8), ('show_correction',wintypes.c_uint8), ('show_isotherm',wintypes.c_uint8), ('reserved1',wintypes.c_uint8*70), ('limit9',wintypes.c_uint8), ('enable_high',wintypes.c_uint8), ('correction',wintypes.c_uint8), ('emissivity;',wintypes.c_uint8), ('transmission',wintypes.c_uint8), ('atmosphere',wintypes.c_int16), ('spot',spot*10), ('iso',iso*3) ] class IRF_SAVEDATA_T(Union): _fields_ = [ ('strSAVEDATA',strSAVEDATA), ('padding',wintypes.c_uint8*512) ] class IRF_IR_CAM_DATA_T(Structure): _fields_ = [ ('ir_image',POINTER(wintypes.USHORT)), ('image_buffer_size',wintypes.DWORD), ('lpNextData',POINTER(wintypes.BYTE)), ('dwSize',wintypes.DWORD), ('dwPosition',wintypes.DWORD), ('msg_type',IRF_MESSAGE_TYPE_T), ('save_data',IRF_SAVEDATA_T), ('fw_ver',wintypes.UINT), ('PMSGTYPE',wintypes.USHORT), ('RCODE',wintypes.USHORT) ]