Make scooby soft dependency

.travis.yml

@@ -4,11 +4,11 @@ language: python
 matrix:
   include:
     - python: 3.5
-      env: PYTHON=3.5 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl"
+      env: PYTHON=3.5 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl scooby"
     - python: 3.6
-      env: PYTHON=3.6 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl"
+      env: PYTHON=3.6 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl scooby"
     - python: 3.6  # => 3.7
-      env: PYTHON=3.7 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl"
+      env: PYTHON=3.7 PCKGS="numexpr matplotlib" CHAN="defaults" TEST="--mpl" INST="pytest-mpl scooby"
     - python: 3.6  # => 3.6 with conda-forge
       env: PYTHON=3.6 PCKGS="numexpr matplotlib" CHAN="conda-forge" TEST="--mpl" INST="pytest-mpl"
     - python: 3.6  # => 3.6 with without matplotlib, numexpr
@@ -30,7 +30,7 @@ install:
   # Install and activate environment, install packages
   - conda create -q -n test-environment -c $CHAN python=$PYTHON numpy scipy pytest pytest-cov $PCKGS
   - source activate test-environment
-  - pip install coveralls pytest-flake8 scooby $INST
+  - pip install coveralls pytest-flake8 $INST
   - python setup.py install
   - cp tests/matplotlibrc .
 

empymod/utils.py

@@ -30,13 +30,20 @@
 
 
 # Mandatory imports
-import scooby
 import warnings
 import numpy as np
 from scipy import special
 from datetime import timedelta
 from timeit import default_timer
 
+# scooby is a soft dependency for empymod
+try:
+    from scooby import Report as ScoobyReport
+except ImportError:
+    class ScoobyReport:
+        def __init__(self, additional, core, optional, ncol, text_width, sort):
+            print("\n* WARNING :: `empymod.Report` requires `scooby`."
+                  "\n             Install it via `pip install scooby`.\n")
 
 # Optional imports
 try:
@@ -1977,10 +1984,10 @@ def spline_backwards_hankel(ht, htarg, opt):
 
 
 # 6. Report
-class Report(scooby.Report):
+class Report(ScoobyReport):
     r"""Print date, time, and version information.
 
-    Use scooby to print date, time, and package version information in any
+    Use ``scooby`` to print date, time, and package version information in any
     environment (Jupyter notebook, IPython console, Python console, QT
     console), either as html-table (notebook) or as plain text (anywhere).
 
@@ -2010,6 +2017,13 @@ class Report(scooby.Report):
         Sort the packages when the report is shown
 
 
+    NOTE
+    ----
+
+    The package ``scooby`` has to be installed in order to use ``Report``:
+    ``pip install scooby``.
+
+
     Examples
     --------
     >>> import pytest

requirements.txt

@@ -6,5 +6,3 @@ numpydoc >= 0.9
 # scipy 0.19.0 has a memory leak in quad
 # github.com/scipy/scipy/pull/7216
 scipy != 0.19.0
-
-scooby >= 0.3.0

runtests.sh

@@ -26,7 +26,7 @@ PCKGS="numpy scipy pytest pytest-cov"
 NMXPR="numexpr matplotlib IPython"
 STR2="**  WITH numexpr/matplotlib/IPython  "
 PROPS="--mpl --flake8"
-INST="pytest-flake8 pytest-mpl"
+INST="pytest-flake8 pytest-mpl scooby"
 SD="_soft-dep"
 WARN=""
 
@@ -94,7 +94,7 @@ for i in ${PYTHON3VERSION[@]}; do
 
   # Install flake8
   if [ ! -d "$HOME/anaconda3/envs"+$NAME ]; then
-    pip install scooby $INST &> $PRINT
+    pip install $INST &> $PRINT
   fi
 
   # Run tests

setup.py

@@ -26,6 +26,5 @@
     install_requires=[
         'numpy',
         'scipy!=0.19.0',
-        'scooby>=0.3.0'
     ],
 )

tests/test_utils.py

@@ -1,4 +1,3 @@
-import scooby
 import pytest
 import numpy as np
 from numpy.testing import assert_allclose
@@ -10,6 +9,12 @@
     use_vml = False
     use_ne_eval = False
 
+# Optional import
+try:
+    import scooby
+except ImportError:
+    scooby = False
+
 from empymod import utils, filters
 
 
@@ -1035,23 +1040,31 @@ def test_spline_backwards_hankel():
 
 
 def test_report(capsys):
+    out, _ = capsys.readouterr()  # Empty capsys
 
     # Reporting is now done by the external package scooby.
     # We just ensure the shown packages do not change (core and optional).
-    out1 = utils.Report()
-    out2 = scooby.Report(
-            core=['numpy', 'scipy', 'empymod'],
-            optional=['numexpr', 'IPython', 'matplotlib'],
-            ncol=3)
+    if scooby:
+        out1 = utils.Report()
+        out2 = scooby.Report(
+                core=['numpy', 'scipy', 'empymod'],
+                optional=['numexpr', 'IPython', 'matplotlib'],
+                ncol=3)
+
+        # Ensure they're the same; exclude time to avoid errors.
+        assert out1.__repr__()[115:] == out2.__repr__()[115:]
 
-    # Ensure they're the same; exclude time to avoid errors.
-    assert out1.__repr__()[115:] == out2.__repr__()[115:]
+    else:  # soft dependency
+        _ = utils.Report()
+        out, _ = capsys.readouterr()  # Empty capsys
+        assert 'WARNING :: `empymod.Report` requires `scooby`' in out
 
 
 def test_versions_backwards():
-    out1 = utils.Report()
-    out2 = utils.Versions()
-    out3 = utils.versions()
+    if scooby:
+        out1 = utils.Report()
+        out2 = utils.Versions()
+        out3 = utils.versions()
 
-    assert out1.__repr__() == out2.__repr__()
-    assert out1.__repr__() == out3.__repr__()
+        assert out1.__repr__() == out2.__repr__()
+        assert out1.__repr__() == out3.__repr__()