Small Fixes

 - Added .venv and .envrc to .gitignore (I use direnv and venv to keep
   my python environments isolated - I hope this is okay!)
 - Removed print statements I left in dom_tag during debugging
 - Replaced global incrementing int with UUID for contextvar ID
   generation - this zeroes the risk of race-hazards/collisions
 - _get_thread_context now returns a tuple vs. a hash of a tuple.
   Functionally not much changes - the underlying dictionary will still
   use the same hashing function but the only difference is that _if_
   there is a collision, the dictionary will still be able to return the
   correct element

.gitignore

@@ -39,3 +39,5 @@ nosetests.xml
 
 .idea
 .idea/
+.venv/
+.envrc

dominate/dom_tag.py

@@ -24,6 +24,7 @@
 from functools import wraps
 import threading
 from asyncio import get_event_loop
+from uuid import uuid4
 from contextvars import ContextVar
 
 try:
@@ -54,15 +55,11 @@
 # We use this to store a unique ID for each async context. We then use thie ID to
 # form the key (in _get_thread_context) that is used to index the _with_context defaultdict.
 # The presense of this key ensures that each async context has its own stack and doesn't conflict.
-async_context_id_counter = 5
 async_context_id = ContextVar('async_context_id', default = None)
 
 def _get_async_context_id():
-  global async_context_id_counter
   if async_context_id.get() is None:
-    async_context_id.set(async_context_id_counter)
-    async_context_id_counter += 1
-  print(async_context_id.get())
+    async_context_id.set(uuid4().hex)
   return async_context_id.get()
 
 def _get_thread_context():
@@ -80,7 +77,7 @@ def _get_thread_context():
   # A runtime error is raised if there is no async loop...
   except RuntimeError:
     pass
-  return hash(tuple(context))
+  return tuple(context)
 
 class dom_tag(object):
   is_single = False  # Tag does not require matching end tag (ex. <hr/>)