Revert "CLN: core/dtypes/cast.py::maybe_downcast_to_dtype (pandas-dev#37050)" (pandas-dev#37116)

This reverts commit fad14fd.

Author: simonjayhawkins

pandas/core/dtypes/cast.py

@@ -2,7 +2,6 @@
 Routines for casting.
 """
 
-from contextlib import suppress
 from datetime import date, datetime, timedelta
 from typing import (
     TYPE_CHECKING,
@@ -170,20 +169,12 @@ def maybe_downcast_to_dtype(result, dtype: Dtype):
 
         dtype = np.dtype(dtype)
 
-    elif dtype.type is Period:
-        from pandas.core.arrays import PeriodArray
-
-        with suppress(TypeError):
-            # e.g. TypeError: int() argument must be a string, a
-            #  bytes-like object or a number, not 'Period
-            return PeriodArray(result, freq=dtype.freq)
-
     converted = maybe_downcast_numeric(result, dtype, do_round)
     if converted is not result:
         return converted
 
     # a datetimelike
-    # GH12821, iNaT is cast to float
+    # GH12821, iNaT is casted to float
     if dtype.kind in ["M", "m"] and result.dtype.kind in ["i", "f"]:
         if hasattr(dtype, "tz"):
             # not a numpy dtype
@@ -196,6 +187,17 @@ def maybe_downcast_to_dtype(result, dtype: Dtype):
         else:
             result = result.astype(dtype)
 
+    elif dtype.type is Period:
+        # TODO(DatetimeArray): merge with previous elif
+        from pandas.core.arrays import PeriodArray
+
+        try:
+            return PeriodArray(result, freq=dtype.freq)
+        except TypeError:
+            # e.g. TypeError: int() argument must be a string, a
+            #  bytes-like object or a number, not 'Period
+            pass
+
     return result