本文最后更新于 2023年9月26日。
`OSError: [WinError 193] %1 不是有效的 Win32 应用程序。
一般报这种错误是由于引用的dll动态链接库和python位数不匹配。例如，python可能是64位但链接库是32位。
如何判断一个dll/exe是32位还是64位？
我把周立功can的链接库zlgcan.dll用记事本打开是PE L所以是32位，和64位的python不匹配。
exescope可以查看到version是1
网传可以使用depends读取dll信息，实际没有成功。
如果按照了visual studio，会有dumpbin程序，将其文件夹加入环境变量，可以使用该工具查看dll中的函数信息。
E:\mydoc\CAN相关\zlgcan_demo\python合集_20221029\python合集_20221029\python带界面demo\demo>dumpbin -exports zlgcan.dll
Microsoft (R) COFF/PE Dumper Version 14.33.31629.0
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file zlgcan.dll
File Type: DLL
Section contains the following exports for zlgcan.dll
00000000 characteristics
61E777B4 time date stamp Wed Jan 19 10:30:12 2022
0.00 version
1 ordinal base
39 number of functions
39 number of names
ordinal hint RVA name
1 0 000098A0 GetIProperty
2 1 000098E0 ReleaseIProperty
3 2 000096A0 ZCAN_ClearBuffer
4 3 00009C50 ZCAN_ClearLINSlaveMsg
5 4 000095E0 ZCAN_CloseDevice
6 5 00009CC0 ZCAN_GetAvailableDevices
7 6 00009600 ZCAN_GetDeviceInf
8 7 00009B90 ZCAN_GetLINReceiveNum
9 8 00009700 ZCAN_GetReceiveNum
10 9 00009CA0 ZCAN_GetReference
11 A 00009860 ZCAN_GetValue
12 B 00009640 ZCAN_InitCAN
13 C 00009B10 ZCAN_InitLIN
14 D 00009620 ZCAN_IsDeviceOnLine
15 E 000095C0 ZCAN_OpenDevice
16 F 000096C0 ZCAN_ReadChannelErrInfo
17 10 000096E0 ZCAN_ReadChannelStatus
18 11 00009740 ZCAN_Receive
19 12 000097E0 ZCAN_ReceiveData
20 13 00009790 ZCAN_ReceiveFD
21 14 00009C00 ZCAN_ReceiveLIN
22 15 00009680 ZCAN_ResetCAN
23 16 00009B50 ZCAN_ResetLIN
24 17 00009D20 ZCAN_SetDeviceChangeCallback
25 18 00009C20 ZCAN_SetLINSlaveMsg
26 19 00009C80 ZCAN_SetReference
27 1A 00009810 ZCAN_SetValue
28 1B 00009660 ZCAN_StartCAN
29 1C 00009B30 ZCAN_StartLIN
30 1D 00009720 ZCAN_Transmit
31 1E 000097C0 ZCAN_TransmitData
32 1F 00009770 ZCAN_TransmitFD
33 20 00009B70 ZCAN_TransmitLIN
34 21 00009980 ZCLOUD_ConnectServer
35 22 00009A30 ZCLOUD_DisconnectServer
36 23 00009A90 ZCLOUD_GetUserData
37 24 000099E0 ZCLOUD_IsConnected
38 25 00009AE0 ZCLOUD_ReceiveGPS
39 26 00009930 ZCLOUD_SetServerInfo
Summary
5000 .data
7000 .rdata
3000 .reloc
1000 .rsrc
2C000 .text