IDLE's changes are lost and input from the keyboard and output to the screen

will not work correctly.

When user code raises SystemExit either directly or by calling sys.exit, IDLE

returns to a Shell prompt instead of exiting.

User output in Shell

^^^^^^^^^^^^^^^^^^^^

======================================

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.

<p>If <code class="docutils literal notranslate"><span class="pre">sys</span></code> is reset by user code, such as with <code class="docutils literal notranslate"><span class="pre">importlib.reload(sys)</span></code>,

IDLE’s changes are lost and input from the keyboard and output to the screen

will not work correctly.</p>

<p>When user code raises SystemExit either directly or by calling sys.exit, IDLE

returns to a Shell prompt instead of exiting.</p>

</div>

<div class="section" id="user-output-in-shell">

<h3>User output in Shell<a class="headerlink" href="#user-output-in-shell" title="Permalink to this headline">¶</a></h3>

<br />

<br />

Last updated on May 16, 2019.

Last updated on May 19, 2019.

<a href="https://docs.python.org/3/bugs.html">Found a bug</a>?

<br />

exec(code, self.locals)

finally:

interruptable = False

except SystemExit:

# Scripts that raise SystemExit should just

# return to the interactive prompt

pass

except SystemExit as e:

if e.args: # SystemExit called with an argument.

ob = e.args[0]

if not isinstance(ob, (type(None), int)):

print('SystemExit: ' + str(ob), file=sys.stderr)

# Return to the interactive prompt.

except:

self.usr_exc_info = sys.exc_info()

if quitting:

exit()

# even print a user code SystemExit exception, continue

print_exception()

jit = self.rpchandler.console.getvar("<<toggle-jit-stack-viewer>>")

if jit:

Print any argument other than None or int passed to SystemExit or

sys.exit().