1 files changed, 98 insertions, 0 deletions
diff --git a/zmq/sugar/constants.py b/zmq/sugar/constants.py
new file mode 100644
index 0000000..8828117
--- /dev/null
+++ b/zmq/sugar/constants.py
@@ -0,0 +1,98 @@
+"""0MQ Constants."""
+
+# Copyright (c) PyZMQ Developers.
+# Distributed under the terms of the Modified BSD License.
+
+from zmq.backend import constants
+from zmq.utils.constant_names import (
+    base_names,
+    switched_sockopt_names,
+    int_sockopt_names,
+    int64_sockopt_names,
+    bytes_sockopt_names,
+    fd_sockopt_names,
+    ctx_opt_names,
+    msg_opt_names,
+)
+
+#-----------------------------------------------------------------------------
+# Python module level constants
+#-----------------------------------------------------------------------------
+
+__all__ = [
+    'int_sockopts',
+    'int64_sockopts',
+    'bytes_sockopts',
+    'ctx_opts',
+    'ctx_opt_names',
+    ]
+
+int_sockopts    = set()
+int64_sockopts  = set()
+bytes_sockopts  = set()
+fd_sockopts     = set()
+ctx_opts        = set()
+msg_opts        = set()
+
+
+if constants.VERSION < 30000:
+    int64_sockopt_names.extend(switched_sockopt_names)
+else:
+    int_sockopt_names.extend(switched_sockopt_names)
+    
+_UNDEFINED = -9999
+
+def _add_constant(name, container=None):
+    """add a constant to be defined
+    
+    optionally add it to one of the sets for use in get/setopt checkers
+    """
+    c = getattr(constants, name, _UNDEFINED)
+    if c == _UNDEFINED:
+        return
+    globals()[name] = c
+    __all__.append(name)
+    if container is not None:
+        container.add(c)
+    return c
+    
+for name in base_names:
+    _add_constant(name)
+
+for name in int_sockopt_names:
+    _add_constant(name, int_sockopts)
+
+for name in int64_sockopt_names:
+    _add_constant(name, int64_sockopts)
+
+for name in bytes_sockopt_names:
+    _add_constant(name, bytes_sockopts)
+
+for name in fd_sockopt_names:
+    _add_constant(name, fd_sockopts)
+
+for name in ctx_opt_names:
+    _add_constant(name, ctx_opts)
+
+for name in msg_opt_names:
+    _add_constant(name, msg_opts)
+
+# ensure some aliases are always defined
+aliases = [
+    ('DONTWAIT', 'NOBLOCK'),
+    ('XREQ', 'DEALER'),
+    ('XREP', 'ROUTER'),
+]
+for group in aliases:
+    undefined = set()
+    found = None
+    for name in group:
+        value = getattr(constants, name, -1)
+        if value != -1:
+            found = value
+        else:
+            undefined.add(name)
+    if found is not None:
+        for name in undefined:
+            globals()[name] = found
+            __all__.append(name)