成员的完整列表，这些成员属于 FoxitPDFSDKPython3.Attachments,包括所有继承而来的类成员

AddEmbeddedFile(key, file_spec)	FoxitPDFSDKPython3.Attachments
AddFromFilePath(key, file_path)	FoxitPDFSDKPython3.Attachments
Attachments(doc, nametree)	FoxitPDFSDKPython3.Attachments
Attachments(other)	FoxitPDFSDKPython3.Attachments
ExtractEmbeddedFileTo(key, dst_file_path)	FoxitPDFSDKPython3.Attachments
GetCount()	FoxitPDFSDKPython3.Attachments
GetEmbeddedFile(key)	FoxitPDFSDKPython3.Attachments
GetKey(index)	FoxitPDFSDKPython3.Attachments
GetNameTree()	FoxitPDFSDKPython3.Attachments
IsEmpty()	FoxitPDFSDKPython3.Attachments
RemoveAllEmbeddedFiles()	FoxitPDFSDKPython3.Attachments
RemoveEmbeddedFile(key)	FoxitPDFSDKPython3.Attachments
SetEmbeddedFile(key, file_spec)	FoxitPDFSDKPython3.Attachments