On Wed, 29 Jun 2022 at 11:00, Rob Cliffe via Python-list <
python-list@python.org> wrote:
On 26/06/2022 23:22, Jon Ribbens via Python-list wrote:
On 2022-06-26, Rob Cliffe <rob.cliffe@btinternet.com> wrote:
This 2-line program
def f(): pass
def g(): pass
runs silently (no Exception). But:
23:07:02 c:\>python
Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:20:19) [MSC v.1925 32 >> bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information. >>>>> def f(): pass
... def g(): pass
File "<stdin>", line 2
def g(): pass
^
SyntaxError: invalid syntax
Is there a good reason for this?
For some reason, the REPL can't cope with one-line blocks like that.
If you put a blank line after each one-block line then it will work.
It's actually not to do with 1-line blocks, just attempting to define 2 functions "at once":
22:27:23 C:\>python
Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:20:19) [MSC v.1925 32
bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
def f():
... return 42
... def g():
File "<stdin>", line 3
def g():
^
SyntaxError: invalid syntax
But you are right that adding a blank line after the first function definition solves the "problem".
And if you have something where you want to copy and paste multiple
statements, there are a few ways to do it:
1) Put "if 1:" at the top. That makes it a single block, so you can
paste in as much as you like, as long as the only blank line is at the
end.
2) Put the code into a file and then use "python3 -i setup.py". That
runs all the code, then drops you into the REPL in that context.
3) Put the code into a file, and inside the REPL, "from setup import
*". Unlike option 2, this can be done after the beginning of the
session. Downside: editing setup.py and reimporting won't apply your
changes.
ChrisA
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