create a eagerloading option and support bpython

Author: RonnyPfannschmidt

CHANGELOG

@@ -10,6 +10,8 @@
 - introduce apipkg.distribution_version(name) as helper to
   obtain the current version number of a package from install metadata
   its used by default with the package name
+- add an eagerloading option and eagerload automatically
+  if bpython is used
 
 1.2
 ----------------------------------------

apipkg.py

@@ -38,7 +38,7 @@ def distribution_version(name):
 __version__ = distribution_version(__name__)
 
 
-def initpkg(pkgname, exportdefs, attr=dict()):
+def initpkg(pkgname, exportdefs, attr=dict(), eager=False):
     """ initialize given package from the export definitions. """
     oldmod = sys.modules.get(pkgname)
     d = {}
@@ -59,6 +59,11 @@ def initpkg(pkgname, exportdefs, attr=dict()):
         oldmod.__dict__.update(d)
     mod = ApiModule(pkgname, exportdefs, implprefix=pkgname, attr=d)
     sys.modules[pkgname] = mod
+    # eaerload in bypthon to avoid their monkeypatching breaking packages
+    if 'bpython' in sys.modules or eager:
+        for module in sys.modules.values():
+            if isinstance(module, ApiModule):
+                module.__dict__
 
 
 def importobj(modpath, attrname):

test_apipkg.py

@@ -531,3 +531,15 @@ def test_initpkg_without_old_module():
 def test_get_distribution_version():
     assert apipkg.distribution_version('setuptools') is not None
     assert apipkg.distribution_version('email') is None
+
+
+def test_eagerload_on_bython(monkeypatch):
+    monkeypatch.delitem(sys.modules, 'bpython', raising=False)
+    apipkg.initpkg(
+        'apipkg.testmodule.example.lazy',
+        {'test': 'apipkg.does_not_exist'})
+    monkeypatch.setitem(sys.modules, 'bpython', True)
+    with pytest.raises(ImportError):
+        apipkg.initpkg(
+            'apipkg.testmodule.example.lazy',
+            {'test': 'apipkg.does_not_exist'})