Hi Adam,

Thanks for the suggestion. I have upgraded the protobuf version to 3.9.2 
and the issue has been resolved. :)

Is there any option to mark this as resolved or solved or answered?




On Friday, October 4, 2019 at 5:08:00 AM UTC+5:30, Adam Cozzette wrote:
>
> I believe that is due to an API change in Python 3.7 which was fixed in 
> protobuf with this pull request: 
> https://github.com/protocolbuffers/protobuf/pull/4862 If you use a more 
> recent version of protobuf then that should fix the problem.
>
> On Thu, Oct 3, 2019 at 12:26 PM ratankumar shivaratri <
> [email protected] <javascript:>> wrote:
>
>> Hi All,
>>
>> Basically I am following the tutorial from the below link.
>>
>> https://github.com/EdjeElectronics/TensorFlow-Object-Detection-on-the-Raspberry-Pi
>>
>> I have reached till the point where I have to run the below command.
>> "python3 setup.py build --cpp_implementation" 
>>
>> I am using Raspberry pi 4 B model. Python version is 3.7
>> after running the command i have received the below error.
>>
>> "
>> pi@raspberrypi:~/protobuf-3.5.1/python $ python3 setup.py build 
>> --cpp_implementation
>> running build
>> running build_py
>> running build_ext
>> building 'google.protobuf.pyext._message' extension
>> arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g 
>> -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time 
>> -D_FORTIFY_SOURCE=2 -fPIC -I. -I../src -I/usr/include/python3.7m -c 
>> google/protobuf/pyext/descriptor_database.cc -o 
>> build/temp.linux-armv7l-3.7/google/protobuf/pyext/descriptor_database.o 
>> -Wno-write-strings -Wno-invalid-offsetof -Wno-sign-compare
>> arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g 
>> -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time 
>> -D_FORTIFY_SOURCE=2 -fPIC -I. -I../src -I/usr/include/python3.7m -c 
>> google/protobuf/pyext/repeated_composite_container.cc -o 
>> build/temp.linux-armv7l-3.7/google/protobuf/pyext/repeated_composite_container.o
>>  
>> -Wno-write-strings -Wno-invalid-offsetof -Wno-sign-compare
>> arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g 
>> -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time 
>> -D_FORTIFY_SOURCE=2 -fPIC -I. -I../src -I/usr/include/python3.7m -c 
>> google/protobuf/pyext/descriptor_containers.cc -o 
>> build/temp.linux-armv7l-3.7/google/protobuf/pyext/descriptor_containers.o 
>> -Wno-write-strings -Wno-invalid-offsetof -Wno-sign-compare
>> google/protobuf/pyext/descriptor_containers.cc: In function ‘bool 
>> google::protobuf::python::descriptor::_GetItemByKey(google::protobuf::python::PyContainer*,
>>  
>> PyObject*, const void**)’:
>> google/protobuf/pyext/descriptor_containers.cc:69:45: error: invalid 
>> conversion from ‘const char*’ to ‘char*’ [-fpermissive]
>>         ((*(charpp) = PyUnicode_AsUTF8AndSize(ob, (sizep))) == NULL? -1: 
>> 0): \
>>                       ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
>> google/protobuf/pyext/descriptor_containers.cc:172:13: note: in expansion 
>> of macro ‘PyString_AsStringAndSize’
>>          if (PyString_AsStringAndSize(key, &name, &name_size) < 0) {
>>              ^~~~~~~~~~~~~~~~~~~~~~~~
>> google/protobuf/pyext/descriptor_containers.cc:69:45: error: invalid 
>> conversion from ‘const char*’ to ‘char*’ [-fpermissive]
>>         ((*(charpp) = PyUnicode_AsUTF8AndSize(ob, (sizep))) == NULL? -1: 
>> 0): \
>>                       ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
>> google/protobuf/pyext/descriptor_containers.cc:189:13: note: in expansion 
>> of macro ‘PyString_AsStringAndSize’
>>          if (PyString_AsStringAndSize(key, &camelcase_name, &name_size) < 
>> 0) {
>>              ^~~~~~~~~~~~~~~~~~~~~~~~
>> error: command 'arm-linux-gnueabihf-gcc' failed with exit status 1
>> "
>>
>>
>> Please suggest on how to resolve it. I followed the below options but it 
>> did not resolve.
>> https://github.com/jgarff/rpi_ws281x/issues/294
>>
>> sudo apt-get update
>> sudo apt-get install build-essential python-dev git scons swig
>> sudo apt-get install libzbar-dev libzbar0
>> sudo apt install python-dev
>> sudo apt-get install portaudio19-dev
>> sudo apt install -y python python-pip libffi-dev 
>> python-backports.ssl-match-hostname
>>
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>>  
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>> .
>>
>

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