Merge pull request #174 from simonsobs/use-spt3g-dload

If spt3g.dload is found, use it instead of imp module

python/load_pybindings.py

@@ -1,7 +1,15 @@
 #
 # Based on spt3g.core.load_bindings.
 #
-import platform, sys, imp, os
+import platform, sys, os
+try:
+    # Starting in spt3g 0.3-240-ga9d32d5, a custom loader is available.
+    from spt3g import dload
+    imp = None
+except ImportError:
+    # The imp module is deprecated; to suppress warning, upgrade spt3g ^^^.
+    import imp
+    dload = None
 
 if platform.system().startswith('freebsd') or platform.system().startswith('FreeBSD'):
     # C++ modules are extremely fragile when loaded with RTLD_LOCAL,
@@ -32,7 +40,10 @@ def load_pybindings(paths, name=None, lib_suffix=None):
             name = os.path.split(path)[1]
         # Save copy of current module def
         mod = sys.modules[name]
-        m = imp.load_dynamic(name, path + lib_suffix)
+        if dload is None:
+            m = imp.load_dynamic(name, path + lib_suffix)
+        else:
+            m = dload.load_dynamic(name, name, path + lib_suffix)
         sys.modules[name] = mod # Don't override Python mod with C++
 
         for (k,v) in m.__dict__.items():