[issue43379] Pasting multiple lines in the REPL is broken since 3.9
New submission from Romain Vincent :
DISCLAIMER: This is the first time I submit an issue here. In advance, my
humble apologies if I missed something.
Feel free to correct me :)
--
I regularly test snippets of code by pasting them from a code editor to a shell
REPL.
It works perfectly well in python 3.8 or 3.7 but not in python 3.9.
Demonstration:
Try to copy and paste the following simple snippet:
---
def f():
print("hello world")
---
The result in a python 3.8 REPL (same with 3.7):
---
$ python3.8
Python 3.8.6 (default, Nov 20 2020, 18:29:40)
[Clang 12.0.0 (clang-1200.0.32.27)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> def f():
print("hello world")
>>> f()
hello world
---
But with python 3.9:
---
$ python3.9
Python 3.9.1 (default, Dec 10 2020, 10:36:35)
[Clang 12.0.0 (clang-1200.0.32.27)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> def f():
print("hello world")
File "", line 1
^
SyntaxError: multiple statements found while compiling a single statement
---
This behavior happens with any snippet of code containing at least one indented
line, whether by tabs or spaces and whatever the number of spaces.
Regards.
--
components: IO
messages: 387976
nosy: romainfv
priority: normal
severity: normal
status: open
title: Pasting multiple lines in the REPL is broken since 3.9
type: behavior
versions: Python 3.9
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[issue43379] Pasting multiple lines in the REPL is broken since 3.9
Romain Vincent added the comment:
The lack of dots was something I noticed.
So from your questions (Ned Deily) I have been testing out several things and
found a "wae"!
But first, to answer your questions:
1. both LF and CRLF and it didn't change anything.
2. Running "import readline;print(readline.__doc__)" prints
"... GNU readline", with python 3.7, 3.8 and 3.9.
3. I am using iTerm2, but the problem also happens on MacOS's native
Terminal.app. Versions of python were installed with **homebrew**.
Maybe worth to mention: if I paste my code in a multi line string to execute
with python -c, then it works properly.
e.g.
---
python3.9 -i -c 'a = 42
if a:
print("hello world")
'
hello world
>>>
---
The example is different because I realized I had the same problem on python3.7
and python3.8 when the 2 first lines were at the same level of indentation
(Note sure if this gives a hint as to what the problem is).
HOWEVER, if I use python versions directly downloaded from
https://www.python.org/, then I don't have the problem at all!
Demonstration:
---
/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7
Python 3.7.2 (v3.7.2:9a3ffc0492, Dec 24 2018, 02:44:43)
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import readline;print(readline.__doc__)
Importing this module enables command line editing using libedit readline.
>>> a = 42
>>> if a:
... print("hello world")
...
hello world
>>>
---
Same for python3.9
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