Obtained from:	https://src.fedoraproject.org/rpms/libftdi/pull-request/4

--- python/ftdi1.i.orig	2020-07-07 19:32:55 UTC
+++ python/ftdi1.i
@@ -52,7 +52,7 @@ char * str2charp_size(PyObject* pyObj, int * size)
 %enddef
 %feature("autodoc", ftdi_usb_find_all_docstring) ftdi_usb_find_all;
 %typemap(in,numinputs=0) SWIGTYPE** OUTPUT ($*ltype temp) %{ $1 = &temp; %}
-%typemap(argout) SWIGTYPE** OUTPUT %{ $result = SWIG_Python_AppendOutput($result, SWIG_NewPointerObj((void*)*$1,$*descriptor,0)); %}
+%typemap(argout,noblock=1) SWIGTYPE** OUTPUT { $result = SWIG_AppendOutput($result, SWIG_NewPointerObj((void*)*$1,$*descriptor,0)); }
 %apply SWIGTYPE** OUTPUT { struct ftdi_device_list **devlist };
     int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist,
                           int vendor, int product);
@@ -92,12 +92,12 @@ char * str2charp_size(PyObject* pyObj, int * size)
 %enddef
 %feature("autodoc", ftdi_read_data_docstring) ftdi_read_data;
 %typemap(in,numinputs=1) (unsigned char *buf, int size) %{ $2 = PyInt_AsLong($input);$1 = (unsigned char*)malloc($2*sizeof(char)); %}
-%typemap(argout) (unsigned char *buf, int size) %{
+%typemap(argout,noblock=1) (unsigned char *buf, int size) {
         if(result<0)
                 $2=0;
-        $result = SWIG_Python_AppendOutput($result, charp2str((char*)$1, $2));
+        $result = SWIG_AppendOutput($result, charp2str((char*)$1, $2));
         free($1);
-%}
+}
     int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size);
 %clear (unsigned char *buf, int size);
 
@@ -119,12 +119,12 @@ char * str2charp_size(PyObject* pyObj, int * size)
 %enddef
 %feature("autodoc", ftdi_read_pins_docstring) ftdi_read_pins;
 %typemap(in,numinputs=0) unsigned char *pins ($*ltype temp) %{ $1 = &temp; %}
-%typemap(argout) (unsigned char *pins) %{ $result = SWIG_Python_AppendOutput($result, charp2str((char*)$1, 1)); %}
+%typemap(argout,noblock=1) (unsigned char *pins) { $result = SWIG_AppendOutput($result, charp2str((char*)$1, 1)); }
     int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins);
 %clear unsigned char *pins;
 
 %typemap(in,numinputs=0) unsigned char *latency ($*ltype temp) %{ $1 = &temp; %}
-%typemap(argout) (unsigned char *latency) %{ $result = SWIG_Python_AppendOutput($result, charp2str((char*)$1, 1)); %}
+%typemap(argout,noblock=1) (unsigned char *latency) { $result = SWIG_AppendOutput($result, charp2str((char*)$1, 1)); }
     int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency);
 %clear unsigned char *latency;
 
@@ -137,12 +137,12 @@ char * str2charp_size(PyObject* pyObj, int * size)
 %clear int* value;
 
 %typemap(in,numinputs=1) (unsigned char *buf, int size) %{ $2 = PyInt_AsLong($input);$1 = (unsigned char*)malloc($2*sizeof(char)); %}
-%typemap(argout) (unsigned char *buf, int size) %{
+%typemap(argout,noblock=1) (unsigned char *buf, int size) {
         if(result<0)
                 $2=0;
-        $result = SWIG_Python_AppendOutput($result, charp2str((char*)$1, $2));
+        $result = SWIG_AppendOutput($result, charp2str((char*)$1, $2));
         free($1);
-%}
+}
     int ftdi_get_eeprom_buf(struct ftdi_context *ftdi, unsigned char * buf, int size);
 %clear (unsigned char *buf, int size);