BugFix: Check the PDep method before using the METHOD_MAP dict

The first iteration will assign the value from this dictionary to pdep['method', the T3 will crash at the second iteration, since the corresponding value is not a key in this dict. Here we first check whether the value is already correct, if not we use the mapping dict.

Author: alongd

t3/utils/writer.py

@@ -246,7 +246,7 @@ def write_rmg_input_file(rmg: dict,
     maximumAtoms=${max_atoms},
 )
 """
-        pdep['method'] = METHOD_MAP[pdep['method']]
+        pdep['method'] = pdep['method'] if pdep['method'] in list(METHOD_MAP.values()) else METHOD_MAP[pdep['method']]
         pdep['T_min'], pdep['T_max'], pdep['T_count'] = pdep['T']
         pdep['P_min'], pdep['P_max'], pdep['P_count'] = pdep['P']
         pdep['T_count'], pdep['P_count'] = int(pdep['T_count']), int(pdep['P_count'])