Fix import errors more elegantly.

pydle/__init__.py

@@ -1,18 +1,15 @@
-import os
-
-__name__ = 'pydle'
-__version__ = '0.8.0'
-__version_info__ = (0, 8, 0)
-__license__ = '3-clause BSD'
-
-
-if os.environ.get('READTHEDOCS', None) != 'True':
 from . import async, connection, protocol, client, features
 
 from .async import coroutine, Future
 from .client import Error, NotInChannel, AlreadyInChannel, BasicClient, ClientPool
 from .features.ircv3_1.cap import NEGOTIATING as CAPABILITY_NEGOTIATING, FAILED as CAPABILITY_FAILED, NEGOTIATED as CAPABILITY_NEGOTIATED
 
+__name__ = 'pydle'
+__version__ = '0.8.0'
+__version_info__ = (0, 8, 0)
+__license__ = 'BSD'
+
+
 def featurize(*features):
     """ Put features into proper MRO order. """
     from functools import cmp_to_key

pydle/async.py

@@ -1,5 +1,6 @@
 ## async.py
 # Light wrapper around whatever async library pydle uses.
+import os
 import functools
 import itertools
 import collections
@@ -7,8 +8,24 @@ import threading
 import datetime
 import types
 
+try:
     import tornado.concurrent
     import tornado.ioloop
+except ImportError:
+    if os.environ.get('READTHEDOCS', None) == 'True':
+        # Shim some objects for RTD.
+        class tornado:
+            class concurrent:
+                class TracebackFuture:
+                    pass
+
+            class ioloop:
+                class IOLoop:
+                    READ = 1
+                    WRITE = 2
+                    ERROR = 3
+    else:
+        raise
 
 FUTURE_TIMEOUT = 30