Installing py3exiv2 on macOS issues

Question

I would like to calibrate a camera lens, to do this, I am following the instructions here. According to the instrucitons, I need the python3-exiv2 dependency from here.

When I try to run this:

pip3 install py3exiv2

I get this:

Collecting py3exiv2
  Using cached https://files.pythonhosted.org/packages/39/0d/e3a63593c620c4a2999809aa011aa6f190553b20fd6904f7a11946dde722/py3exiv2-0.6.1.tar.gz
Building wheels for collected packages: py3exiv2
  Building wheel for py3exiv2 (setup.py) ... error
  Complete output from command /usr/local/opt/python/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/var/folders/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-install-zeuz9z_9/py3exiv2/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 /private/var/folders/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-wheel-1l2_8rw6 --python-tag cp37:
  find: /usr//sbin/authserver: Permission denied
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.macosx-10.14-x86_64-3.7
  creating build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/preview.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/iptc.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/metadata.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/__init__.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/xmp.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/exif.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  copying src/pyexiv2/utils.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
  running build_ext
  building 'libexiv2python' extension
  creating build/temp.macosx-10.14-x86_64-3.7
  creating build/temp.macosx-10.14-x86_64-3.7/src
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -I/usr/local/include -I/usr/local/opt/openssl/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/exiv2wrapper.cpp -o build/temp.macosx-10.14-x86_64-3.7/src/exiv2wrapper.o -g
  In file included from src/exiv2wrapper.cpp:27:
  src/exiv2wrapper.hpp:35:10: fatal error: 'boost/python.hpp' file not found
  #include "boost/python.hpp"
           ^~~~~~~~~~~~~~~~~~
  1 error generated.
  error: command 'clang' failed with exit status 1

  ----------------------------------------
  Failed building wheel for py3exiv2
  Running setup.py clean for py3exiv2
Failed to build py3exiv2
Installing collected packages: py3exiv2
  Running setup.py install for py3exiv2 ... error
    Complete output from command /usr/local/opt/python/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/var/folders/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-install-zeuz9z_9/py3exiv2/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/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-record-mo9lifhv/install-record.txt --single-version-externally-managed --compile:
    find: /usr//sbin/authserver: Permission denied
    running install
    running build
    running build_py
    creating build
    creating build/lib.macosx-10.14-x86_64-3.7
    creating build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/preview.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/iptc.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/metadata.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/__init__.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/xmp.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/exif.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    copying src/pyexiv2/utils.py -> build/lib.macosx-10.14-x86_64-3.7/pyexiv2
    running build_ext
    building 'libexiv2python' extension
    creating build/temp.macosx-10.14-x86_64-3.7
    creating build/temp.macosx-10.14-x86_64-3.7/src
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -I/usr/local/include -I/usr/local/opt/openssl/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/exiv2wrapper.cpp -o build/temp.macosx-10.14-x86_64-3.7/src/exiv2wrapper.o -g
    In file included from src/exiv2wrapper.cpp:27:
    src/exiv2wrapper.hpp:35:10: fatal error: 'boost/python.hpp' file not found
    #include "boost/python.hpp"
             ^~~~~~~~~~~~~~~~~~
    1 error generated.
    error: command 'clang' failed with exit status 1

    ----------------------------------------
Command "/usr/local/opt/python/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/var/folders/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-install-zeuz9z_9/py3exiv2/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/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-record-mo9lifhv/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/var/folders/mn/_vm4d7cx4gx2_l5hkjybzkfc0000gn/T/pip-install-zeuz9z_9/py3exiv2/

I do not know where to start with this output. Can anyone suggest what I can try at this point?

Running the following has not helped:

brew boost-python

Answer 1

The problem you are facing is because on MacOS new versions, the pip3 is not looking for the headers files in correct places. Check my answer here: https://answers.launchpad.net/py3exiv2/+question/700064

This is what fixed it for me:

To get around this problem do the following:

brew install boost-python3 gexiv2 pygobject3

After installing the dependencies, you'll face more errors. To get around those, set the corrext include and linker path and then install the module using pip.

export CPLUS_INCLUDE_PATH=/usr/local/Cellar/exiv2/0.27.5_1/include/:/usr/local/opt/libssh/include/:/usr/local/Cellar/boost/1.76.0/include/
export LDFLAGS="-L/usr/local/Cellar/boost-python3/1.76.0/lib -L/usr/local/Cellar/exiv2/0.27.5_1/lib"

 pip install py3exiv2

or if you are using pipenv

 CPLUS_INCLUDE_PATH=/usr/local/Cellar/exiv2/0.27.5_1/include/:/usr/local/opt/libssh/include/:/usr/local/Cellar/boost/1.76.0/include/ LDFLAGS="-L/usr/local/Cellar/boost-python3/1.76.0/lib -L/usr/local/Cellar/exiv2/0.27.5_1/lib" pipenv install