Merge pull request #16 from beckermr/pickling

ENH enable pickling

.gitignore

@@ -0,0 +1,104 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/

psfex/psfex_lib.py

@@ -128,5 +128,17 @@ def _load_from_fits(self, fits, ext=DEFAULT_EXT):
                                           self['contextscale'],
                                           self['psf_samp'],
                                           self._psf_mask)
-
-
+
+    def __getstate__(self):
+        state = self.__dict__.copy()
+        del state['_psfex']
+        return state
+
+    def __setstate__(self, state):
+        self.__dict__.update(state)
+        self._psfex = _psfex_pywrap.PSFEx(self['masksize'],
+                                          self['poldeg'],
+                                          self['contextoffset'],
+                                          self['contextscale'],
+                                          self['psf_samp'],
+                                          self._psf_mask)

psfex/tests/test_pickles.py

@@ -0,0 +1,28 @@
+import os
+import io
+import pickle
+import numpy as np
+
+from ..psfex_lib import PSFEx
+
+
+def test_pickles():
+    fname = os.path.join(
+        os.path.dirname(os.path.realpath(__file__)),
+        'test_psfcat.psf'
+    )
+
+    psf = PSFEx(fname)
+    im = psf.get_rec(10, 11)
+
+    val = io.BytesIO()
+    pickle.dump(psf, val)
+    val.flush()
+    val.seek(0)
+    new_psf = pickle.load(val)
+    new_im = new_psf.get_rec(10, 11)
+
+    assert np.array_equal(new_im, im)
+
+    # also make sure old object still works
+    assert np.array_equal(im, psf.get_rec(10, 11))