Add Python 3 modules, and more Python 2 modules.

Also, sort names alphabetically and add module docstrings.

python2/gc.py

@@ -1,30 +1,31 @@
+"""Stub file for the 'gc' module."""
 # This is an autogenerated file. It serves as a starting point
 # for a more percise manual annotation of this module.
 # Feel free to edit the source below, but remove this header when you do.
 
-def set_debug(a: int) -> NoneType: pass
-
-def get_threshold() -> tuple: pass
-
 def collect(*args, **kwargs) -> int:
     raise ValueError()
 
-def is_tracked(*args, **kwargs) -> bool: pass
-
-def get_referents(*args, **kwargs) -> list: pass
-
-def isenabled() -> bool: pass
-
-def set_threshold(a: int, *args, **kwargs) -> NoneType: pass
-
-def get_debug() -> int: pass
-
 def disable() -> NoneType: pass
 
-def get_count() -> tuple: pass
-
 def enable() -> NoneType: pass
 
+def get_count() -> tuple: pass
+
+def get_debug() -> int: pass
+
 def get_objects() -> list: pass
 
+def get_referents(*args, **kwargs) -> list: pass
+
 def get_referrers(*args, **kwargs) -> list: pass
+
+def get_threshold() -> tuple: pass
+
+def is_tracked(*args, **kwargs) -> bool: pass
+
+def isenabled() -> bool: pass
+
+def set_debug(a: int) -> NoneType: pass
+
+def set_threshold(a: int, *args, **kwargs) -> NoneType: pass