Add logging argument options

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

aqt/installer.py

@@ -21,12 +21,12 @@
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 import functools
-import logging
 import os
 import py7zr
 import requests
 import traceback
 import xml.etree.ElementTree as ElementTree
+from logging import getLogger
 from six import StringIO
 from multiprocessing.dummy import Pool
 from operator import and_
@@ -47,8 +47,13 @@ class QtInstaller:
     Installer class to download packages and extract it.
     """
 
-    def __init__(self, qt_archives):
+    def __init__(self, qt_archives, logging=None):
         self.qt_archives = qt_archives
+        if logging:
+            self.logger = logging
+        else:
+            self.logger = getLogger('aqt')
+
 
     @staticmethod
     def retrieve_archive(package, path=None, command=None):
@@ -126,7 +131,7 @@ class QtInstaller:
                 print("Configuration file generation error: %s" % e.args)
                 exc_buffer = StringIO()
                 traceback.print_exc(file=exc_buffer)
-                logging.error('Error happened when writing configuration files:\n%s', exc_buffer.getvalue())
+                self.logger.error('Error happened when writing configuration files:\n%s', exc_buffer.getvalue())
                 raise e
         else:
             exit(1)