prefer logging to print

[prjemian]

During initial development, various diagnostic information was print() to the console. For a package, this console output should be suppressed. Yet the diagnostics still have their value. The Python logging package is commonly used. These diagnostics would be reported at the DEBUG level.

Convert existing print() arguments to use logging and possibly also report to the mainwindow's status bar, as appropriate.

[prjemian]

(bluesky_2023_2) jemian@otz ~/.../gemviz23/demo $ git grep "print"
app_settings.py:    print(f"{ss=}")
app_settings.py:    print(f"{ss.fileName()=}")
app_settings.py:    print(f"{ss.applicationName()=}")
app_settings.py:    print(f"{ss.organizationName()=}")
app_settings.py:    print(f"{ss.status()=}")
app_settings.py:        print(f"{key=} {ss.getKey(key)=} {ss._keySplit_(key)=}")
app_settings.py:    print(f"{ss.getKey(None)=}")
date_time_range_slider.py:    print(f"{main.low()=}  {main.high()=}")
filterpanel.py:        print(f"catalogSelected: {catalog_name=} {args = }  {kwargs = }")
filterpanel.py:        print(f"{t_low=} {t_high=}")
filterpanel.py:        print(f"{since=} {until=}")
filterpanel.py:        print(f"filteredCatalog: {cat=}")
range_slider.py:        # print(self._low)
range_slider.py:        # print(low_rect, high_rect)
range_slider.py:        # print(min_pos, max_pos, c)
range_slider.py:        # print(groove.x(), groove.y(), groove.width(), groove.height())
resultwindow.py:            # print("Display role:", index.row(), index.column())
resultwindow.py:        # print(f"doPager {action =}, {value =}")
resultwindow.py:        # print(f"{catalog_length=} {offset=}  {size=}")
resultwindow.py:        # print(f"{self.pageOffset()=} {self.pageSize()=}")
resultwindow.py:        # print(f"{action=} {kwargs=}")
resultwindow.py:            print(f"{model.pageOffset()=}")
resultwindow.py:        # print(f"doPageSize {value =}")
resultwindow.py:        # print(f"Displaying catalog: {self.cat.item['id']!r}")
tiledserverdialog.py:        # print(f"{url=} {url.isValid()=} {url.isRelative()=}")
utils.py:    # print(f"myLoadUi({ui_file=})")

[prjemian]

Add command line options for selection of logging levels:

option	logging level
default	logging.ERROR
-v	logging.WARNING
-vv	logging.INFO
-vvv	logging.DEBUG

[prjemian]

See this SO post: https://stackoverflow.com/questions/57192387/how-to-set-logging-level-from-command-line

[prjemian]

Note: -v is already used as shorthand for --version.