Use a global dict map between network_id and URL

xrpl/asyncio/wallet/wallet_generation.py

@@ -17,6 +17,7 @@
 _DEV_FAUCET_URL: Final[str] = "https://faucet.devnet.rippletest.net/accounts"
 
 _TIMEOUT_SECONDS: Final[int] = 40
+_MAP_NETWORK_ID_TO_URL: Dict[int, str] = {1: _TEST_FAUCET_URL, 2: _DEV_FAUCET_URL}
 
 
 class XRPLFaucetException(XRPLException):
@@ -177,10 +178,8 @@ def get_faucet_url(network_id: int) -> str:
         XRPLFaucetException: if the provided network_id does not correspond to testnet
             or devnet.
     """
-    map_network_id_to_url: Dict[int, str] = {1: _TEST_FAUCET_URL, 2: _DEV_FAUCET_URL}
-
-    if network_id in map_network_id_to_url:
-        return map_network_id_to_url[network_id]
+    if network_id in _MAP_NETWORK_ID_TO_URL:
+        return _MAP_NETWORK_ID_TO_URL[network_id]
 
     # corresponds to sidechain-net2 network
     if network_id == 262:
@@ -195,7 +194,9 @@ def get_faucet_url(network_id: int) -> str:
 
     # this line is unreachable. Custom devnets must specify a faucet_host input
     raise XRPLFaucetException(
-        "The NetworkID of the provided network ( " + str(network_id) + ") does not have a known faucet."
+        "The NetworkID of the provided network ( "
+        + str(network_id)
+        + ") does not have a known faucet."
     )