python 3.7 support

[malloxpb]

I got this when I was trying to install scrapy-bench on Python 3.7. Can you guys confirm this for me? Thank you!

Failed building wheel for vmprof
  Running setup.py clean for vmprof
Successfully built statistics
Failed to build vmprof
Installing collected packages: Click, docutils, statistics, certifi, chardet, urllib3, requests, pytz, colorama, vmprof, Scrapy-Benchmark
  Running setup.py install for vmprof ... error
    Complete output from command /Users/nctl144/.virtualenvs/scurl/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/s8/l1tmdszx12767sf1ygdfv16h0000gn/T/pip-install-sy_xjgaa/vmprof/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/s8/l1tmdszx12767sf1ygdfv16h0000gn/T/pip-record-xh5mxbgb/install-record.txt --single-version-externally-managed --compile --install-headers /Users/nctl144/.virtualenvs/scurl/bin/../include/site/python3.7/vmprof:
    running install
    running build
    running build_py
    creating build
    creating build/lib.macosx-10.9-x86_64-3.7
    creating build/lib.macosx-10.9-x86_64-3.7/vmshare
    copying vmshare/binary.py -> build/lib.macosx-10.9-x86_64-3.7/vmshare
    copying vmshare/service.py -> build/lib.macosx-10.9-x86_64-3.7/vmshare
    copying vmshare/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/vmshare
    creating build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/show.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/upload.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/reader.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/cli.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/stats.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/profiler.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    copying vmprof/__main__.py -> build/lib.macosx-10.9-x86_64-3.7/vmprof
    creating build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/query.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/upload.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/constants.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/merge_point.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/parser.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/marks.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/objects.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/prettyprinter.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    copying jitlog/__main__.py -> build/lib.macosx-10.9-x86_64-3.7/jitlog
    running build_ext
    building '_vmprof' extension
    creating build/temp.macosx-10.9-x86_64-3.7
    creating build/temp.macosx-10.9-x86_64-3.7/src
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/_vmprof.c -o build/temp.macosx-10.9-x86_64-3.7/src/_vmprof.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    src/_vmprof.c:68:13: warning: assigning to 'char *' from 'const char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
        co_name = PyUnicode_AsUTF8(co->co_name);
                ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    src/_vmprof.c:71:17: warning: assigning to 'char *' from 'const char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
        co_filename = PyUnicode_AsUTF8(co->co_filename);
                    ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    2 warnings generated.
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/machine.c -o build/temp.macosx-10.9-x86_64-3.7/src/machine.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/compat.c -o build/temp.macosx-10.9-x86_64-3.7/src/compat.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/vmp_stack.c -o build/temp.macosx-10.9-x86_64-3.7/src/vmp_stack.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/vmprof_common.c -o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_common.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/vmprof_memory.c -o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_memory.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/symboltable.c -o build/temp.macosx-10.9-x86_64-3.7/src/symboltable.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/vmprof_unix.c -o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_unix.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    src/vmprof_unix.c:137:34: warning: comparison of integers of different signs: 'unsigned long' and 'long' [-Wsign-compare]
                if (state->thread_id == mythread_id) {
                    ~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~
    1 warning generated.
    gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/vmprof_mt.c -o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_mt.o -Wno-unused -DVMPROF_APPLE=1 -DVMPROF_UNIX=1 -g -O2 -I src/ -I src/libbacktrace
    gcc -bundle -undefined dynamic_lookup -arch x86_64 -g build/temp.macosx-10.9-x86_64-3.7/src/_vmprof.o build/temp.macosx-10.9-x86_64-3.7/src/machine.o build/temp.macosx-10.9-x86_64-3.7/src/compat.o build/temp.macosx-10.9-x86_64-3.7/src/vmp_stack.o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_common.o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_memory.o build/temp.macosx-10.9-x86_64-3.7/src/symboltable.o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_unix.o build/temp.macosx-10.9-x86_64-3.7/src/vmprof_mt.o -o build/lib.macosx-10.9-x86_64-3.7/_vmprof.cpython-37m-darwin.so
    duplicate symbol __PyThreadState_Current in:
        build/temp.macosx-10.9-x86_64-3.7/src/_vmprof.o
        build/temp.macosx-10.9-x86_64-3.7/src/vmprof_common.o
    duplicate symbol __PyThreadState_Current in:
        build/temp.macosx-10.9-x86_64-3.7/src/_vmprof.o
        build/temp.macosx-10.9-x86_64-3.7/src/vmprof_unix.o
    ld: 2 duplicate symbols for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    error: command 'gcc' failed with exit status 1
    
    ----------------------------------------
Command "/Users/nctl144/.virtualenvs/scurl/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/s8/l1tmdszx12767sf1ygdfv16h0000gn/T/pip-install-sy_xjgaa/vmprof/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/s8/l1tmdszx12767sf1ygdfv16h0000gn/T/pip-record-xh5mxbgb/install-record.txt --single-version-externally-managed --compile --install-headers /Users/nctl144/.virtualenvs/scurl/bin/../include/site/python3.7/vmprof" failed with error code 1 in /private/var/folders/s8/l1tmdszx12767sf1ygdfv16h0000gn/T/pip-install-sy_xjgaa/vmprof/