ImportError: No module named 'decls'

Hi

I get the following error when importing pyvips:

$ python testvips.py 
DEBUG:pyvips:Binary module load failed: No module named '_libvips'
DEBUG:pyvips:Falling back to ABI mode
DEBUG:pyvips:Loaded lib <cffi.api._make_ffi_library.<locals>.FFILibrary object at 0x7fd20b984278>
DEBUG:pyvips:Loaded lib <cffi.api._make_ffi_library.<locals>.FFILibrary object at 0x7fd20b9e1eb8>
DEBUG:pyvips:Inited libvips
DEBUG:pyvips:
Traceback (most recent call last):
  File "testvips.py", line 4, in <module>
    import pyvips
  File "/REDACTED/.venv/lib/python3.5/site-packages/pyvips/__init__.py", line 75, in <module>
    import decls
ImportError: No module named 'decls'

I tried on 2 machines with the same result:

• Ubuntu 16.04.1 LTS, Python 3.5.2
• Ubuntu 17.04, Python 3.5.3

I ran sudo apt-get install libvips libvips-dev libvips-tools --no-install-recommends Then in my virtualenv pip install pyvips pip show tells me pyvips is Version: 2.1.1 in ABI mode

Is there anything I missed?

[matrey]

Good news! No more error on Ubuntu (server) 16.04.1 LTS + libvips 8.2.2-1 (without -dev) / ABI mode

$ pip install --upgrade --no-cache-dir git+git://github.com/jcupitt/pyvips.git@4df6fb5a7b50a6ba540c7fad529df7272c7efe51
Collecting git+git://github.com/jcupitt/pyvips.git@4df6fb5a7b50a6ba540c7fad529df7272c7efe51
  Cloning git://github.com/jcupitt/pyvips.git (to 4df6fb5a7b50a6ba540c7fad529df7272c7efe51) to /tmp/pip-riwrh6b2-build
  Could not find a tag or branch '4df6fb5a7b50a6ba540c7fad529df7272c7efe51', assuming commit.
Collecting cffi>=1.0.0 (from pyvips==2.1.2)
  Downloading cffi-1.11.5-cp35-cp35m-manylinux1_x86_64.whl (420kB)
    100% |████████████████████████████████| 430kB 91kB/s 
Requirement already up-to-date: pycparser in ./.venv/lib/python3.5/site-packages (from cffi>=1.0.0->pyvips==2.1.2)
Installing collected packages: cffi, pyvips
  Found existing installation: cffi 1.10.0
    Uninstalling cffi-1.10.0:
      Successfully uninstalled cffi-1.10.0
  Found existing installation: pyvips 2.1.2
    Uninstalling pyvips-2.1.2:
      Successfully uninstalled pyvips-2.1.2
  Running setup.py install for pyvips ... done
Successfully installed cffi-1.11.5 pyvips-2.1.2
$ pip show pyvips
Name: pyvips
Version: 2.1.2
Summary: binding for the libvips image processing library, ABI mode
...
$ python testvips.py 
DEBUG:pyvips:Binary module load failed: No module named '_libvips'
DEBUG:pyvips:Falling back to ABI mode
DEBUG:pyvips:Loaded lib <cffi.api._make_ffi_library.<locals>.FFILibrary object at 0x7fe78636e5c0>
DEBUG:pyvips:Loaded lib <cffi.api._make_ffi_library.<locals>.FFILibrary object at 0x7fe786842eb8>
DEBUG:pyvips:Inited libvips
DEBUG:pyvips:
test Image
DEBUG:pyvips.voperation:VipsOperation.call: operation_name = VipsForeignLoadPng
DEBUG:pyvips.voperation:VipsOperation.call: string_options = 
DEBUG:pyvips.voperation:VipsOperation.call: match_image = None
DEBUG:pyvips.vobject:VipsObject.set: name = filename, value = /REDACTED/pricedrop.png
DEBUG:pyvips.vobject:VipsObject.get: name = out
DEBUG:pyvips.vobject:VipsObject.get: name = width
DEBUG:pyvips.vobject:VipsObject.get: name = height
DEBUG:pyvips.vobject:VipsObject.get: name = format
DEBUG:pyvips.vobject:VipsObject.get: name = bands
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
DEBUG:pyvips.voperation:VipsOperation.call: result = <pyvips.Image 1812x859 uchar, 4 bands, srgb>
DEBUG:pyvips.vobject:VipsObject.get: name = width
DEBUG:pyvips.vobject:VipsObject.get: name = height
DEBUG:pyvips.vobject:VipsObject.get: name = format
DEBUG:pyvips.vobject:VipsObject.get: name = bands
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
image = <pyvips.Image 1812x859 uchar, 4 bands, srgb>
DEBUG:pyvips.vobject:VipsObject.get: name = width
image.width = 1812

I also re-checked the other platform just in case. Ubuntu desktop 17.04, Python 3.5.3, libvips 8.4.5-1build1 (installed libvips, libvips-dev, libvips-tools)

• with dev headers installed, API mode --> OK
• after uninstalling the dev headers, ABI mode --> OK

[jcupitt]

Great! I’ll merge your PR too. Thank you again for reporting this.