add Dockerfile

[motokimura]

Hi, I added Dockerfile.
I've checked I could run tools/test.py with CUDA in the container build with this Dockerfile.

[innerlee]

I got the following error when building this image, could you take a look?

Building wheels for collected packages: pycocotools
  Building wheel for pycocotools (setup.py): started
  Building wheel for pycocotools (setup.py): finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: /opt/conda/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-req-build-dp31qnai/PythonAPI/setup.py'"'"'; __file__='"'"'/tmp/pip-req-build-dp31qnai/PythonAPI/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-uupm8nte
       cwd: /tmp/pip-req-build-dp31qnai/PythonAPI
  Complete output (63 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.linux-x86_64-3.7
  creating build/lib.linux-x86_64-3.7/pycocotools
  copying pycocotools/__init__.py -> build/lib.linux-x86_64-3.7/pycocotools
  copying pycocotools/mask.py -> build/lib.linux-x86_64-3.7/pycocotools
  copying pycocotools/cocoeval.py -> build/lib.linux-x86_64-3.7/pycocotools
  copying pycocotools/coco.py -> build/lib.linux-x86_64-3.7/pycocotools
  running build_ext
  building 'pycocotools._mask' extension
  creating build/common
  creating build/temp.linux-x86_64-3.7
  creating build/temp.linux-x86_64-3.7/pycocotools
  gcc -pthread -B /opt/conda/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/opt/conda/lib/python3.7/site-packages/numpy/core/include -I../common -I/opt/conda/include/python3.7m -c ../common/maskApi.c -o build/temp.linux-x86_64-3.7/../common/maskApi.o -Wno-cpp -Wno-unused-function -std=c99
  ../common/maskApi.c: In function ‘rleDecode’:
  ../common/maskApi.c:46:7: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
         for( k=0; k<R[i].cnts[j]; k++ ) *(M++)=v; v=!v; }}
         ^~~
  ../common/maskApi.c:46:49: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
         for( k=0; k<R[i].cnts[j]; k++ ) *(M++)=v; v=!v; }}
                                                   ^
  ../common/maskApi.c: In function ‘rleFrPoly’:
  ../common/maskApi.c:166:3: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
     for(j=0; j<k; j++) x[j]=(int)(scale*xy[j*2+0]+.5); x[k]=x[0];
     ^~~
  ../common/maskApi.c:166:54: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
     for(j=0; j<k; j++) x[j]=(int)(scale*xy[j*2+0]+.5); x[k]=x[0];
                                                        ^
  ../common/maskApi.c:167:3: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
     for(j=0; j<k; j++) y[j]=(int)(scale*xy[j*2+1]+.5); y[k]=y[0];
     ^~~
  ../common/maskApi.c:167:54: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
     for(j=0; j<k; j++) y[j]=(int)(scale*xy[j*2+1]+.5); y[k]=y[0];
                                                        ^
  ../common/maskApi.c: In function ‘rleToString’:
  ../common/maskApi.c:212:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
         if(more) c |= 0x20; c+=48; s[p++]=c;
         ^~
  ../common/maskApi.c:212:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
         if(more) c |= 0x20; c+=48; s[p++]=c;
                             ^
  ../common/maskApi.c: In function ‘rleFrString’:
  ../common/maskApi.c:220:3: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]
     while( s[m] ) m++; cnts=malloc(sizeof(uint)*m); m=0;
     ^~~~~
  ../common/maskApi.c:220:22: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘while’
     while( s[m] ) m++; cnts=malloc(sizeof(uint)*m); m=0;
                        ^~~~
  ../common/maskApi.c:228:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(m>2) x+=(long) cnts[m-2]; cnts[m++]=(uint) x;
       ^~
  ../common/maskApi.c:228:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
       if(m>2) x+=(long) cnts[m-2]; cnts[m++]=(uint) x;
                                    ^~~~
  ../common/maskApi.c: In function ‘rleToBbox’:
  ../common/maskApi.c:141:31: warning: ‘xp’ may be used uninitialized in this function [-Wmaybe-uninitialized]
         if(j%2==0) xp=x; else if(xp<x) { ys=0; ye=h-1; }
                                 ^
  gcc -pthread -B /opt/conda/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/opt/conda/lib/python3.7/site-packages/numpy/core/include -I../common -I/opt/conda/include/python3.7m -c pycocotools/_mask.c -o build/temp.linux-x86_64-3.7/pycocotools/_mask.o -Wno-cpp -Wno-unused-function -std=c99
  gcc: error: pycocotools/_mask.c: No such file or directory
  error: command 'gcc' failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for pycocotools
  Running setup.py clean for pycocotools
Failed to build pycocotools

[motokimura]

@innerlee
You're right. Cython is required to build pycocotools.
Could you check again?

[innerlee]

thanks!