Merge pull request #410 from sjsrey/remote

Do not poll remotes on init.

libpysal/cg/ops/tests/test_tabular.py

@@ -57,11 +57,15 @@ def test_dissolve(self):
         self.assertEqual(out[0].area, 2.0)
         self.assertEqual(out[1].area, 2.0)
 
-        answer_vertices0 = [(0, 0), (0, 1), (0, 2), (1, 2), (1, 1), (1, 0), (0, 0)]
-        answer_vertices1 = [(2, 1), (2, 0), (1, 0), (1, 1), (1, 2), (2, 2), (2, 1)]
+        answer_vertices0 = set([(0, 0), (0, 1), (0, 2), (1, 2), (1, 1), (1, 0), (0, 0)])
+        answer_vertices1 = set([(2, 1), (2, 0), (1, 0), (1, 1), (1, 2), (2, 2), (2, 1)])
+
+        s0 = set([tuple(map(int,t)) for t in out[0].vertices])
+        s1 = set([tuple(map(int,t)) for t in out[1].vertices])
+
+        self.assertTrue(s0==answer_vertices0)
+        self.assertTrue(s1==answer_vertices1)
 
-        np.testing.assert_allclose(out[0].vertices, answer_vertices0)
-        np.testing.assert_allclose(out[1].vertices, answer_vertices1)
 
     def test_clip(self):
         pass

libpysal/examples/__init__.py

@@ -4,20 +4,34 @@
 
 from .base import example_manager
 from .remotes import datasets as remote_datasets
-from .remotes import download as fetch_all
 from .builtin import datasets as builtin_datasets
 
 
 from typing import Union
 
 __all__ = ["get_path", "available", "explain", "fetch_all"]
 
-example_manager.add_examples(remote_datasets)
 example_manager.add_examples(builtin_datasets)
 
+def fetch_all():
+    """Fetch and install all remote datasets
+    """
+    datasets = remote_datasets.datasets
+    names = list(datasets.keys())
+    names.sort()
+    for name in names:
+        print(name)
+        example = datasets[name]
+        try:
+            example.download()
+        except:
+            print("Example not downloaded: {}".format(name))
+    example_manager.add_examples(datasets)
+
 
 def available() -> str:
     """List available datasets."""
+    fetch_all()
 
     return example_manager.available()
 
@@ -30,8 +44,13 @@ def explain(name: str) -> str:
 
 def load_example(example_name: str) -> Union[base.Example, builtin.LocalExample]:
     """Load example dataset instance."""
+    example = example_manager.load(example_name)
+
+    if example is None:
+        fetch_all()  # refresh remotes
+        example = example_manager.load(example_name)
 
-    return example_manager.load(example_name)
+    return example
 
 
 def get_path(file_name: str) -> str:

libpysal/examples/remotes.py

@@ -95,20 +95,17 @@ def poll_remotes():
     return datasets
 
 
-datasets = poll_remotes()
+#datasets = poll_remotes()
 
+class Remotes:
+    def __init__(self):
+        self._datasets = None
 
-def download(datasets=datasets):
-    """
-    Download all known remotes
-    """
+    @property
+    def datasets(self):
+        if self._datasets is None:
+            self._datasets = poll_remotes()
+        return self._datasets
+
+datasets = Remotes()
 
-    names = list(datasets.keys())
-    names.sort()
-    for name in names:
-        print(name)
-        example = datasets[name]
-        try:
-            example.download()
-        except:
-            print("Example not downloaded: {}".format(name))