qt和python交互Demo(含异常处理)

What's New in IDLE 3.9.0 (since 3.8.0) Released on 2020-10-05? ====================================== bpo-41468: Improve IDLE run crash error message (which users should never see). bpo-41373: Save files loaded with no line ending, as when blank, or different line endings, by setting its line ending to the system default. Fix regression in 3.8.4 and 3.9.0b4. bpo-41300: Save files with non-ascii chars. Fix regression in 3.9.0b4 and 3.8.4. bpo-37765: Add keywords to module name completion list. Rewrite Completions section of IDLE doc. bpo-41152: The encoding of ``stdin``, ``stdout`` and ``stderr`` in IDLE is now always UTF-8. bpo-41144: Make Open Module open a special module such as os.path. bpo-40723: Make test_idle pass when run after import. Patch by Florian Dahlitz. bpo-38689: IDLE will no longer freeze when inspect.signature fails when fetching a calltip. bpo-27115: For 'Go to Line', use a Query entry box subclass with IDLE standard behavior and improved error checking. bpo-39885: When a context menu is invoked by right-clicking outside of a selection, clear the selection and move the cursor. Cut and Copy require that the click be within the selection. bpo-39852: Edit "Go to line" now clears any selection, preventing accidental deletion. It also updates Ln and Col on the status bar. bpo-39781: Selecting code context lines no longer causes a jump. bpo-39663: Add tests for pyparse find_good_parse_start(). bpo-39600: Remove duplicate font names from configuration list. bpo-38792: Close a shell calltip if a :exc:`KeyboardInterrupt` or shell restart occurs. Patch by Zackery Spytz. bpo-30780: Add remaining configdialog tests for buttons and highlights and keys tabs. bpo-39388: Settings dialog Cancel button cancels pending changes. bpo-39050: Settings dialog Help button again displays help text. bpo-32989: Add tests for editor newline_and_indent_event method. Remove unneeded arguments and dead code from pyparse find_good_parse_start method. bpo-38943: Fix autocomplete windows not always appearing on some systems. Patch by Johnny Najera. bpo-38944: Escape key now closes IDLE completion windows. Patch by Johnny Najera. bpo-38862: 'Strip Trailing Whitespace' on the Format menu removes extra newlines at the end of non-shell files. bpo-38636: Fix IDLE Format menu tab toggle and file indent width. These functions (default shortcuts Alt-T and Alt-U) were mistakenly disabled in 3.7.5 and 3.8.0. bpo-4630: Add an option to toggle IDLE's cursor blink for shell, editor, and output windows. See Settings, General, Window Preferences, Cursor Blink. Patch by Zackery Spytz. bpo-26353: Stop adding newline when saving an IDLE shell window. bpo-38598: Do not try to compile IDLE shell or output windows. What's New in IDLE 3.8.0 (since 3.7.0) Released on 2019-10-14 ====================================== bpo-36698: IDLE no longer fails when writing non-encodable characters to stderr. It now escapes them with a backslash, like the regular Python interpreter. Add an errors field to the standard streams. bpo-13153: Improve tkinter's handing of non-BMP (astral) unicode characters, such as 'rocket \U0001f680'. Whether a proper glyph or replacement char is displayed depends on the OS and font. For IDLE, astral chars in code interfere with editing. bpo-35379: When exiting IDLE, catch any AttributeError. One happens when EditorWindow.close is called twice. Printing a traceback, when IDLE is run from a terminal, is useless and annoying. bpo-38183: To avoid test issues, test_idle ignores the user config directory. It no longer tries to create or access .idlerc or any files within. Users must run IDLE to discover problems with saving settings. bpo-38077: IDLE no longer adds 'argv' to the user namespace when initializing it. This bug only affected 3.7.4 and 3.8.0b2 to 3.8.0b4. bpo-38401: Shell restart lines now fill the window width, always start with '=', and avoid wrapping unnecessarily. The line will still wrap if the included file name is long relative to the width. bpo-37092: Add mousewheel scrolling for IDLE module, path, and stack browsers. Patch by George Zhang. bpo-35771: To avoid occasional spurious test_idle failures on slower machines, increase the ``hover_delay`` in test_tooltip. bpo-37824: Properly handle user input warnings in IDLE shell. Cease turning SyntaxWarnings into SyntaxErrors. bpo-37929: IDLE Settings dialog now closes properly when there is no shell window. bpo-37849: Fix completions list appearing too high or low when shown above the current line. bpo-36419: Refactor autocompete and improve testing. bpo-37748: Reorder the Run menu. Put the most common choice, Run Module, at the top. bpo-37692: Improve highlight config sample with example shell interaction and better labels for shell elements. bpo-37628: Settings dialog no longer expands with font size. The font and highlight sample boxes gain scrollbars instead. bpo-17535: Add optional line numbers for IDLE editor windows. bpo-37627: Initialize the Customize Run dialog with the command line arguments most recently entered before. The user can optionally edit before submitting them. bpo-33610: Code context always shows the correct context when toggled on. bpo-36390: Gather Format menu functions into format.py. Combine paragraph.py, rstrip.py, and format methods from editor.py. bpo-37530: Optimize code context to reduce unneeded background activity. Font and highlight changes now occur along with text changes instead of after a random delay. bpo-27452: Cleanup config.py by inlining RemoveFile and simplifying the handling of __file__ in CreateConfigHandlers/ bpo-26806: To compensate for stack frames added by IDLE and avoid possible problems with low recursion limits, add 30 to limits in the user code execution process. Subtract 30 when reporting recursion limits to make this addition mostly transparent. bpo-37325: Fix tab focus traversal order for help source and custom run dialogs. bpo-37321: Both subprocess connection error messages now refer to the 'Startup failure' section of the IDLE doc. bpo-37177: Properly attach search dialogs to their main window so that they behave like other dialogs and do not get hidden behind their main window. bpo-37039: Adjust "Zoom Height" to individual screens by momentarily maximizing the window on first use with a particular screen. Changing screen settings may invalidate the saved height. While a window is maximized, "Zoom Height" has no effect. bpo-35763: Make calltip reminder about '/' meaning positional-only less obtrusive by only adding it when there is room on the first line. bpo-5680: Add 'Run Customized' to the Run menu to run a module with customized settings. Any command line arguments entered are added to sys.argv. One can suppress the normal Shell main module restart. bpo-35610: Replace now redundant editor.context_use_ps1 with .prompt_last_line. This finishes change started in bpo-31858. bpo-32411: Stop sorting dict created with desired line order. bpo-37038: Make idlelib.run runnable; add test clause. bpo-36958: Print any argument other than None or int passed to SystemExit or sys.exit(). bpo-36807: When saving a file, call file.flush() and os.fsync() so bits are flushed to e.g. a USB drive. bpo-36429: Fix starting IDLE with pyshell. Add idlelib.pyshell alias at top; remove pyshell alias at bottom. Remove obsolete __name__=='__main__' command. bpo-30348: Increase test coverage of idlelib.autocomplete by 30%. Patch by Louie Lu. bpo-23205: Add tests and refactor grep's findfiles. bpo-36405: Use dict unpacking in idlelib. bpo-36396: Remove fgBg param of idlelib.config.GetHighlight(). This param was only used twice and changed the return type. bpo-23216: IDLE: Add docstrings