# -*- coding: utf-8 -*- """Navigator Exceptions and Exception handling module.""" # Standard library imports from traceback import format_exc def display_qt_error_box(error, traceback): """Display a Qt styled error message box.""" from anaconda_navigator.widgets.dialogs import MessageBoxError text = ( 'An unexpected error occurred on Navigator start-up
' '{error}'.format(error=error) ) trace = '{trace}'.format(trace=traceback) print(text) print(trace) msg_box = MessageBoxError( title='Navigator Start Error', text=text, error=trace, report=False, # Disable reporting on github learn_more=None, ) msg_box.setFixedWidth(600) return msg_box.exec_() def display_browser_error_box(error, traceback): """Display a new browser window with an error description.""" template = ''' Navigator Error

Navigator Error

An unexpected error occurred on Navigator start-up

Report

Please report this issue in the anaconda issue tracker

Main Error

{error}

Traceback

{trace}

''' try: from urllib import pathname2url # Python 2.x except Exception: from urllib.request import pathname2url # Python 3.x import tempfile temppath = tempfile.mktemp(suffix='.html') with open(temppath, 'w') as f: f.write(template.format(error=error, trace=traceback)) url = 'file:{}'.format(pathname2url(temppath)) import webbrowser webbrowser.open_new_tab(url) def exception_handler(func, *args, **kwargs): """Handle global application exceptions and display information.""" try: return_value = func(*args, **kwargs) if isinstance(return_value, int): return return_value except Exception as e: return handle_exception(e) def try_func(func, *args, **kwargs): try: value = func(*args, **kwargs) return value except Exception as e: return handle_exception(e) def handle_exception(error): """This will provide a dialog for the user with the error found.""" traceback = format_exc() # Try using a Qt message box, if that fails try: display_qt_error_box(error, traceback) except Exception: # If that fails try to write a temp html file try: display_browser_error_box(error, traceback) except Exception: print(traceback)