Merge pull request qiskit-community/qiskit-aqua#803 from manoelmarque…

…s/provider

Refactor logging methods

qiskit/optimization/__init__.py

@@ -2,7 +2,7 @@
 
 # This code is part of Qiskit.
 #
-# (C) Copyright IBM 2019.
+# (C) Copyright IBM 2019, 2020.
 #
 # This code is licensed under the Apache License, Version 2.0. You may
 # obtain a copy of this license in the LICENSE.txt file in the root directory
@@ -28,3 +28,9 @@
    ising
 
 """
+
+from ._logging import (get_qiskit_optimization_logging,
+                       set_qiskit_optimization_logging)
+
+__all__ = ['get_qiskit_optimization_logging',
+           'set_qiskit_optimization_logging']

qiskit/optimization/_logging.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+
+# This code is part of Qiskit.
+#
+# (C) Copyright IBM 2020.
+#
+# This code is licensed under the Apache License, Version 2.0. You may
+# obtain a copy of this license in the LICENSE.txt file in the root directory
+# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+#
+# Any modifications or derivative works of this code must retain this
+# copyright notice, and modified files need to carry a notice indicating
+# that they have been altered from the originals.
+
+"""Utilities for Optimization logging."""
+
+from typing import Optional
+from qiskit.aqua import (QiskitLogDomains,
+                         get_logging_level,
+                         set_logging_level)
+
+
+def get_qiskit_optimization_logging() -> int:
+    """
+    Returns the current Qiskit Optimization logging level
+
+    Returns:
+        int: logging level
+    """
+    return get_logging_level(QiskitLogDomains.DOMAIN_OPTIMIZATION)
+
+
+def set_qiskit_optimization_logging(level: int, filepath: Optional[str] = None) -> None:
+    """
+    Updates the Qiskit Optimization logging with the appropriate logging level
+
+    Args:
+        level: minimum severity of the messages that are displayed.
+        filepath: file to receive logging data
+    """
+    set_logging_level(level, [QiskitLogDomains.DOMAIN_OPTIMIZATION], filepath)