Remove Cython dependency when installing from PyPI. (#118)

* Remove cython dependency for PyPI install.

* Version bump and cleaner publish.

* Add comments to the publish process.

* Update changelog.

* Update travis.

* Update getting started guide.

.travis.yml

@@ -43,8 +43,7 @@ before_install: |
 
 install:
   - pip install -U pip && pip install --install-option="--no-cython-compile" cython
-  - pip install --progress-bar off -r requirements.txt && pip install pycodestyle
-  - python setup.py develop
+  - pip install --progress-bar off -e . && pip install pycodestyle
   # - python -c 'import torch, torchvision; print(torch.__version__, torchvision.__version__)'
 
 script:

CHANGELOG.md

@@ -15,6 +15,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 
+## v0.1.0.1
+
+### Fixed
+
+* Remove Cython dependency when installing from PyPI and clean up package distribution.
+
+
 ## v0.1.0
 
 ### Added

MANIFEST.in

@@ -1,3 +1,4 @@
 global-include *.pyx
 global-include *.pxd
+global-include *.c
 include learn2learn/**/*

Makefile

@@ -56,5 +56,8 @@ release:
 	git push origin --tags
 
 publish:
-	python setup.py sdist
-	twine upload --repository-url https://upload.pypi.org/legacy/ dist/*
+	pip install -e .  # Full build
+	rm -f learn2learn/*.so  # Remove .so files but leave .c files
+	rm -f learn2learn/**/*.so
+	python setup.py sdist  # Create package
+	twine upload --repository-url https://upload.pypi.org/legacy/ dist/*  # Push to PyPI

docs/source/tutorials/getting_started.md

@@ -17,6 +17,8 @@ For the most update-to-date version clone the [repository](https://github.com/le
 
 ```pip install -e .```
 
+When installing from sources, make sure that Cython is installed: `pip install cython`.
+
 !!! info
     While learn2learn is actively used in current research projects, it is still in development.
     Breaking changes might occur.

learn2learn/_version.py

@@ -1 +1 @@
-__version__ = '0.1.0'
+__version__ = '0.1.0.1'

setup.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import sys
 import re
 
 from distutils.core import setup
@@ -8,8 +9,6 @@
     find_packages,
     Extension
 )
-from Cython.Build import cythonize
-from Cython.Distutils import build_ext
 
 # Parses version number: https://stackoverflow.com/a/7071358
 VERSIONFILE = 'learn2learn/_version.py'
@@ -24,27 +23,38 @@
 # Compile with Cython
 # https://cython.readthedocs.io/en/latest/src/userguide/source_files_and_compilation.html
 # https://github.com/FedericoStra/cython-package-example/blob/master/setup.py
-include_dirs = []
-compiler_directives = {'language_level': 3,
-                       'embedsignature': True,
-#                       'profile': True,
-#                       'binding': True,
-}
+extension_type = '.c'
+cmd_class = {}
+use_cython = 'develop' in sys.argv
+if use_cython:
+    from Cython.Build import cythonize
+    from Cython.Distutils import build_ext
+    extension_type = '.pyx'
+    cmd_class = {'build_ext': build_ext}
+
 extensions = [
     Extension(name='learn2learn.data.meta_dataset',
-              sources=['learn2learn/data/meta_dataset.pyx']), 
+              sources=['learn2learn/data/meta_dataset' + extension_type]), 
     Extension(name='learn2learn.data.task_dataset',
-              sources=['learn2learn/data/task_dataset.pyx']), 
+              sources=['learn2learn/data/task_dataset' + extension_type]), 
     Extension(name='learn2learn.data.transforms',
-              sources=['learn2learn/data/transforms.pyx']), 
+              sources=['learn2learn/data/transforms' + extension_type]), 
 ]
 
+if use_cython:
+    compiler_directives = {'language_level': 3,
+                           'embedsignature': True,
+    #                       'profile': True,
+    #                       'binding': True,
+    }
+    extensions = cythonize(extensions, compiler_directives=compiler_directives)
+
 # Installs the package
 install(
     name='learn2learn',
     packages=find_packages(),
-    ext_modules=cythonize(extensions, compiler_directives=compiler_directives),
-    cmdclass={'build_ext': build_ext},
+    ext_modules=extensions,
+    cmdclass=cmd_class,
     zip_safe=False,  # as per Cython docs
     version=VERSION,
     description='PyTorch Meta-Learning Framework for Researchers',