Attempt to make t3f.get_variable work in eager mode

t3f/variables.py

@@ -55,7 +55,7 @@ def get_variable(name,
     raise ValueError('Scope reuse is False and initializer is not provided.')
 
   variable_cores = []
-  if reuse:
+  if reuse is True:
     # Find an existing variable in the collection.
     path = tf.get_variable_scope().name
     if path != '' and path[-1] != '/':
@@ -69,8 +69,8 @@ def get_variable(name,
         break
     if found_v is None:
       raise ValueError('ValueError: Variable %s does not exist, or was not '
-                       'created with t3f.get_tt_variable(). Did you mean to '
-                       'set reuse=None in VarScope?' % name)
+                       'created with t3f.get_variable(). Did you mean to '
+                       'set reuse=False or reuse=tf.AUTO_REUSE in VarScope?' % name)
     with tf.variable_scope(name):
       # Try to get the first core through tf.get_variable to check that we don't
       # violate reuse: it will raise a ValueError otherwise.