PySimLogger: add parameter to set initial log-level/verbosity

When we initialize a new PySimLogger, we always call the setup method
first and then use the set_verbose and set_level method to configure
the initial log level and the initial log verbosity. However, we
initialize the PySimLogger in all our programs the same way and we
end up with the same boilerplate code every time. Let's add a keyword
parameter to the setup method where we can pass our opts.verbose (bool)
parameter so that the setup method can do the work for the main program.

In case the caller wants a different default configuration he still can
call set_verbose and set_level methods as needed.

Change-Id: I4b8ef1e203186878910c9614a1d900d5759236a8

contrib/csv-to-pgsql.py

@@ -285,10 +285,7 @@ if __name__ == '__main__':
     option_parser.add_argument("--admin", action='store_true', help="perform action as admin", default=False)
     opts = option_parser.parse_args()
 
-    PySimLogger.setup(print, {logging.WARN: "\033[33m"})
-    if (opts.verbose):
-        PySimLogger.set_verbose(True)
-        PySimLogger.set_level(logging.DEBUG)
+    PySimLogger.setup(print, {logging.WARN: "\033[33m"}, opts.verbose)
 
     # Open CSV file
     cr = open_csv(opts)

pySim-shell.py

@@ -107,12 +107,12 @@ Online manual available at https://downloads.osmocom.org/docs/pysim/master/html/
             kwargs = {'include_ipy': True}
 
         self.verbose = verbose
+        PySimLogger.setup(self.poutput, {logging.WARN: YELLOW})
         self._onchange_verbose('verbose', False, self.verbose);
 
         # pylint: disable=unexpected-keyword-arg
         super().__init__(persistent_history_file='~/.pysim_shell_history', allow_cli_args=False,
                          auto_load_commands=False, startup_script=script, **kwargs)
-        PySimLogger.setup(self.poutput, {logging.WARN: YELLOW})
         self.intro = style(self.BANNER, fg=RED)
         self.default_category = 'pySim-shell built-in commands'
         self.card = None
@@ -1175,13 +1175,7 @@ if __name__ == '__main__':
     opts = option_parser.parse_args()
 
     # Ensure that we are able to print formatted warnings from the beginning.
-    PySimLogger.setup(print, {logging.WARN: YELLOW})
-    if opts.verbose:
-        PySimLogger.set_verbose(True)
-        PySimLogger.set_level(logging.DEBUG)
-    else:
-        PySimLogger.set_verbose(False)
-        PySimLogger.set_level(logging.INFO)
+    PySimLogger.setup(print, {logging.WARN: YELLOW}, opts.verbose)
 
     # Register csv-file as card data provider, either from specified CSV
     # or from CSV file in home directory

pySim/log.py

@@ -63,7 +63,7 @@ class PySimLogger:
         raise RuntimeError('static class, do not instantiate')
 
     @staticmethod
-    def setup(print_callback = None, colors:dict = {}):
+    def setup(print_callback = None, colors:dict = {}, verbose_debug:bool = False):
         """
         Set a print callback function and color scheme. This function call is optional. In case this method is not
         called, default settings apply.
@@ -72,10 +72,20 @@ class PySimLogger:
                              have the following format: print_callback(message:str)
             colors : An optional dict through which certain log levels can be assigned a color.
                      (e.g. {logging.WARN: YELLOW})
+            verbose_debug: Enable verbose logging and set the loglevel DEBUG when set to true. Otherwise the
+                           non-verbose logging is used and the loglevel is set to INFO. This setting can be changed
+                           using the set_verbose and set_level methods at any time.
         """
         PySimLogger.print_callback = print_callback
         PySimLogger.colors = colors
 
+        if (verbose_debug):
+            PySimLogger.set_verbose(True)
+            PySimLogger.set_level(logging.DEBUG)
+        else:
+            PySimLogger.set_verbose(False)
+            PySimLogger.set_level(logging.INFO)
+
     @staticmethod
     def set_verbose(verbose:bool = False):
         """