No module named spacy. Try: pip install -U spacy

[ZzoxAA]

I got this when I want to instantiate a Spacy object. But I'm sure I have installed spacy and I can run python -m spacy correctly. Cloud you please provide some possible reasons for this situation？

[d99kris]

Hi!
Let me first check, is the issue title exactly matching the error message you are seeing (older versions of spacy-cpp had such message, but recent versions suggests user to use pip3)? If yes, please try latest spacy-cpp.

Can your system access Spacy in Python? Like for example the Python code in https://github.com/d99kris/spacy-cpp#example-usage

If yes, I suspect there could be some mismatch between for which Python version Spacy is installed for, and which Python version you are building spacy-cpp for. By default spacy-cpp's CMakeLists.txt uses Python v3.x, so spacy needs to be installed for Python 3 (e.g. using pip3). Alternatively one can change spacy-cpp's CMakeLists.txt to build for Python 2 (not recommended as Python 2 is EOL) by changing:

find_package(PythonLibs 3 REQUIRED)
find_package(PythonInterp 3 REQUIRED)

to

find_package(PythonLibs 2.7 REQUIRED)
find_package(PythonInterp 2.7 REQUIRED)

and rebuild (maybe delete build dir first, just in case).

If still no success, perhaps you can share more system details such as version of OS, Python, CMake, C++ Compiler. Thanks!

[d99kris]

I believe the above steps should help resolving the issue, so I will proceed to close this issue. Feel free to re-open it for follow-up questions. Thanks!

[nuttyartist]

I'm getting the same error after building the header only example.

I'm running ./exprog1
And get:

libc++abi: terminating with uncaught exception of type std::runtime_error: No module named spacy. Try: pip3 install -U spacy
Abort trap: 6

EDIT: I can successfully reproduce the Python example usage:

>>> import spacy
>>> nlp = spacy.load("en_core_web_sm")
>>> doc = nlp(u"This is a sentence.")
>>> for token in doc:
...     print(token.text + " [" + token.pos_ + "]")
... 
This [PRON]
is [AUX]
a [DET]
sentence [NOUN]
. [PUNCT]

EDIT2:

Some more info - Cmake:

-- The C compiler identification is AppleClang 13.0.0.13000029
-- The CXX compiler identification is AppleClang 13.0.0.13000029
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonLibs: /usr/local/Frameworks/Python.framework/Versions/3.11/lib/libpython3.11.dylib (found suitable version "3.11.0", minimum required is "3") 
-- Found PythonInterp: /Users/ruby/venv11_2/bin/python3 (found suitable version "3.11.1", minimum required is "3") 
-- Build tests: OFF
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/build

Make:

[  7%] Building CXX object CMakeFiles/exprog1.dir/src/exprog1.cpp.o
In file included from /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/src/exprog1.cpp:5:
In file included from /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/spacy:12:
In file included from /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/attrs.h:72:
In file included from /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/attrs.cpp:13:
In file included from /Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/python.h:210:
/Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/python.cpp:42:5: warning: 'PySys_SetArgv' is deprecated [-Wdeprecated-declarations]
    PySys_SetArgv(0, m_argv.get());
    ^
/usr/local/Frameworks/Python.framework/Versions/3.11/include/python3.11/sysmodule.h:13:1: note: 'PySys_SetArgv' has been explicitly marked deprecated here
Py_DEPRECATED(3.11) PyAPI_FUNC(void) PySys_SetArgv(int, wchar_t **);
^
/usr/local/Frameworks/Python.framework/Versions/3.11/include/python3.11/pyport.h:336:54: note: expanded from macro 'Py_DEPRECATED'
#define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
                                                     ^
1 warning generated.
[ 15%] Linking CXX executable exprog1
[ 15%] Built target exprog1
[ 23%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/attrs.cpp.o
[ 30%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/nlp.cpp.o
[ 38%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/python.cpp.o
/Users/ruby/Downloads/test/cmake-add-subdirectory-hdr/spacy-cpp/src/spacy/python.cpp:42:5: warning: 'PySys_SetArgv' is deprecated [-Wdeprecated-declarations]
    PySys_SetArgv(0, m_argv.get());
    ^
/usr/local/Frameworks/Python.framework/Versions/3.11/include/python3.11/sysmodule.h:13:1: note: 'PySys_SetArgv' has been explicitly marked deprecated here
Py_DEPRECATED(3.11) PyAPI_FUNC(void) PySys_SetArgv(int, wchar_t **);
^
/usr/local/Frameworks/Python.framework/Versions/3.11/include/python3.11/pyport.h:336:54: note: expanded from macro 'Py_DEPRECATED'
#define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
                                                     ^
1 warning generated.
[ 46%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/span.cpp.o
[ 53%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/doc.cpp.o
[ 61%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/pyobjectptr.cpp.o
[ 69%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/spacy.cpp.o
[ 76%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/stringstore.cpp.o
[ 84%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/token.cpp.o
[ 92%] Building CXX object spacy-cpp/CMakeFiles/spacy.dir/src/spacy/vocab.cpp.o
[100%] Linking CXX shared library libspacy.dylib
[100%] Built target spacy