Squeezer - squeeze large output in IDLE's shell

[taleinat]

BPO	1529353
Nosy	@terryjreedy, @taleinat, @serhiy-storchaka, @csabella, @miss-islington
PRs	bpo-1529353: IDLE: squeeze large output in the shell #7626 [3.7] bpo-1529353: IDLE: squeeze large output in the shell (GH-7626) #9561 [3.6] bpo-1529353: IDLE: squeeze large output in the shell (GH-7626) #9562 bpo-1529353: IDLE: Squeezer What's New for 3.6.7 #9567 bpo-1529353: IDLE - Squeezer What's New for 3.7.1 #9568 [3.7] bpo-1529353: IDLE: Squeezer What's New for 3.6.7 (GH-9567) #9569 [3.6] bpo-1529353: IDLE: Squeezer What's New for 3.6.7 (GH-9567) #9570 [3.7] bpo-1529353: IDLE - Squeezer What's New for 3.7.1 (GH-9568) #9571 bpo-1529353: IDLE - Squeezer What's New for 3.8 #9572 bpo-1529353: Explain Shell text squeezing in the IDLE doc. #10169 [3.7] bpo-1529353: Explain Shell text squeezing in the IDLE doc. (GH-10169) #10179 [3.6] bpo-1529353: Explain Shell text squeezing in the IDLE doc. (GH-10169) #10180
Dependencies	bpo-33839: IDLE tooltips.py: refactor and add docstrings and tests
Files	Squeezer.py: Noam Raphael's original Squeezer.py (from IDLE-fork) IDLE_Squeezer.patch: initial patch taleinat.20140211.IDLE_Squeezer.patch: modern patch for Python 3.4 Squeezer_Screenshot.PNG

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/terryjreedy'
closed_at = <Date 2018-09-26.11:40:17.976>
created_at = <Date 2006-07-27.00:13:56.000>
labels = ['3.8', 'expert-IDLE', 'type-feature', '3.7']
title = "Squeezer - squeeze large output in IDLE's shell"
updated_at = <Date 2018-10-28.17:08:26.340>
user = 'https://github.com/taleinat'

bugs.python.org fields:

activity = <Date 2018-10-28.17:08:26.340>
actor = 'miss-islington'
assignee = 'terry.reedy'
closed = True
closed_date = <Date 2018-09-26.11:40:17.976>
closer = 'terry.reedy'
components = ['IDLE']
creation = <Date 2006-07-27.00:13:56.000>
creator = 'taleinat'
dependencies = ['33839']
files = ['7428', '7429', '34050', '34209']
hgrepos = []
issue_num = 1529353
keywords = ['patch']
message_count = 59.0
messages = ['50765', '50766', '50767', '50768', '50769', '84637', '84645', '84657', '210296', '210310', '211027', '211068', '211071', '211075', '211076', '211083', '211643', '211645', '211646', '211647', '212021', '212061', '319291', '319316', '319317', '319319', '319339', '319344', '319353', '319367', '319428', '319430', '319452', '319494', '319495', '319496', '323471', '324255', '324365', '324374', '326100', '326310', '326343', '326347', '326348', '326349', '326350', '326368', '326369', '326370', '326371', '326372', '326373', '326374', '326419', '326445', '328703', '328710', '328711']
nosy_count = 5.0
nosy_names = ['terry.reedy', 'taleinat', 'serhiy.storchaka', 'cheryl.sabella', 'miss-islington']
pr_nums = ['7626', '9561', '9562', '9567', '9568', '9569', '9570', '9571', '9572', '10169', '10179', '10180']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue1529353'
versions = ['Python 3.6', 'Python 3.7', 'Python 3.8']

[taleinat]

Here is my improved version of Squeezer - the IDLE
extension to end all of your
oh-no-I-just-printed-War-and-Peace-in-the-interpreter
troubles!

Changes:

• Fixed line counting logic
• Line counting is done according to current window
  width and current tab width
• Fixed configHandler to enable reading of raw data
  from config files (100% backwards compatible) - needed
  by Squeezer to enable configuration of text viewers in
  config-extensions

I've been working this vesion without a hitch for
several weeks, but that's hardly enough testing is it?

Attached:

• the original Squeezer.py by Noam Raphael
• a diff against Noam's original Squeezer.py
• a diff of configHandler.py against the current SVN
  version (revision 46863)
• fixed 'middle click to copy' - now works on Windows

One minor note - the 'middle click to copy' didn't work
on Windows because it simply called selection_own()
which doesn't affect the clipboard. I added
clipboard_clear() and clipboard_append() and it now
works on Windows. This should be tested on Linux, Unix,
OSX etc. to check compatibility.

For more info on the clipboard issue, see:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/647feeef55625733/bc08421d8aea9928?lnk=st&q=&rnum=2#bc08421d8aea9928

[kbkaiser]

Logged In: YES
user_id=149084

OK, thanks. Please take a look at the two diffs you
uploaded, they seem corrupted. Squeezer.py looks ok.

[taleinat]

Logged In: YES
user_id=1330769

Uploaded unified diffs instead of standard diffs. Probably
the first diffs had bad newlines because I'm working on Win.

Also 2 changes:

• minor fix - end case when clicking at beginning of text block
• Allow squeezing of stderr (tracebacks...)

[kbkaiser]

Logged In: YES
user_id=149084

Ah, that's better. Thanks.

[kbkaiser]

Delete the patch to configHandler.py, implemented with Patch 1650174.

[taleinat]

"Test needed"? I'll need a bit of guidance on this.

Has there been a change of policy of which I'm not aware, that patches
to IDLE not going to be accepted unless comprehensive tests are included?

Much of IDLE doesn't include tests, e.g. the RPC code. There's a comment
by K.B.K. in the end of rpc.py from September '03 saying we need a
proper test suite for it, and testing that should be simple compared to
testing GUI related functionality.

In any case, if someone can suggest a simple approach to test Squeezer
I'll gladly work it up. As it is, I can think of ways to test certain
functions, but I'm not sure how to approach testing GUI related
functionality (or if I should approach this at all).

[devdanzin]

Tal,
There is no such policy AFAIK. The stage field is a tool to help us
handle the issues, sorry to give you a wrong impression. If IDLE has no
tests, 'test needed' doesn't apply here, so we can set this to 'patch
review'.

If someone is already working on adding tests for IDLE, please revert
this to 'test needed'.

[taleinat]

Daniel, Thanks for clearing that up :)

[taleinat]

Ping?

Can this please go in? It's such a great improvement to user experience!

I've seen too many novice users print a ton of output by accident and have IDLE hang as a result, losing their interactive session. This simple extension avoid those issues completely, while still allowing access to the output if needed.

I'd even be willing to do any extra work required, such as testing on Windows, Linux and OSX. Just tell me what's holding this up!