Add backwards compatibility with servers that use Snow as the weather

src/poke_env/environment/weather.py

@@ -1,10 +1,9 @@
 """This module defines the Weather class, which represents a in-battle weather."""
 
 import logging
-from enum import Enum, auto, unique
+from enum import Enum, auto
 
 
-@unique
 class Weather(Enum):
     """Enumeration, represent a non null weather in a battle."""
 
@@ -15,7 +14,7 @@ class Weather(Enum):
     PRIMORDIALSEA = auto()
     RAINDANCE = auto()
     SANDSTORM = auto()
-    SNOWSCAPE = auto()
+    SNOWSCAPE = SNOW = auto()
     SUNNYDAY = auto()
 
     def __str__(self) -> str:

unit_tests/environment/test_enumerations.py

@@ -184,6 +184,7 @@ def test_side_condition_build():
 
 def test_weather_str():
     assert str(Weather["HAIL"])
+    assert Weather.SNOW == Weather.SNOWSCAPE
     assert Weather["UNKNOWN"] == Weather.from_showdown_message("hehehe")