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| author | Terry Jan Reedy <tjreedy@udel.edu> | 2021-02-24 00:39:51 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-02-24 00:39:51 (GMT) |
| commit | 2827e8a177c2a6584fada594bca6829c53a2872f (patch) | |
| tree | 4110f13a66a62ce34205652c8df4fd8bb506bad2 /Lib/idlelib/help.html | |
| parent | b798ab06937f8bb24b444a49dd42e11fff15e654 (diff) | |
| download | cpython-2827e8a177c2a6584fada594bca6829c53a2872f.zip cpython-2827e8a177c2a6584fada594bca6829c53a2872f.tar.gz cpython-2827e8a177c2a6584fada594bca6829c53a2872f.tar.bz2 | |
bpo-43283: Add IDLE doc paragraph about print speed (GH-24615)
Printing to IDLE's Shell is often slower than printing to a system
terminal, but it can be made faster by pre-formatting a single
string before printing.
Diffstat (limited to 'Lib/idlelib/help.html')
| -rw-r--r-- | Lib/idlelib/help.html | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Lib/idlelib/help.html b/Lib/idlelib/help.html index 1eefa50..924042d 100644 --- a/Lib/idlelib/help.html +++ b/Lib/idlelib/help.html @@ -679,6 +679,14 @@ process, it replaces <code class="docutils literal notranslate"><span class="pre with objects that get input from and send output to the Shell window. The original values stored in <code class="docutils literal notranslate"><span class="pre">sys.__stdin__</span></code>, <code class="docutils literal notranslate"><span class="pre">sys.__stdout__</span></code>, and <code class="docutils literal notranslate"><span class="pre">sys.__stderr__</span></code> are not touched, but may be <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p> +<p>Sending print output from one process to a text widget in another is +slower than printing to a system terminal in the same process. +This has the most effect when printing multiple arguments, as the string +for each argument, each separator, the newline are sent separately. +For development, this is usually not a problem, but if one wants to +print faster in IDLE, format and join together everything one wants +displayed together and then print a single string. Both format strings +and <a class="reference internal" href="stdtypes.html#str.join" title="str.join"><code class="xref py py-meth docutils literal notranslate"><span class="pre">str.join()</span></code></a> can help combine fields and lines.</p> <p>IDLE’s standard stream replacements are not inherited by subprocesses created in the execution process, whether directly by user code or by modules such as multiprocessing. If such subprocess use <code class="docutils literal notranslate"><span class="pre">input</span></code> from @@ -982,7 +990,7 @@ also used for testing.</p> <br /> <br /> - Last updated on Feb 21, 2021. + Last updated on Feb 23, 2021. <a href="https://docs.python.org/3/bugs.html">Found a bug</a>? <br /> |