Syntax error with * in function argument list #7338
Description
This works as expected under CPython but throws a syntax error in MicroPython (RP2 and Unix build).
def bar():
return 1, 2
class Foo:
def __init__(self, x, y, z):
print(x, y, z)
foo = Foo(*bar(), 3)It seems that the * is interpreted as the specifier for kwonly args. Outcome:
Traceback (most recent call last):
File "<stdin>", line 8, in <module>
SyntaxError: non-keyword arg after */**
A further observation. When I pasted this code in an mpremote session, a few seconds after the syntax error was reported mpremote fell over. Note that mpremote is as installed with pip3. Here is the complete session.
$ mpremote mount .
Local directory . is mounted at /remote
Connected to MicroPython at /dev/ttyACM0
Use Ctrl-] to exit this shell
>
MicroPython v1.15 on 2021-04-29; Raspberry Pi Pico with RP2040
Type "help()" for more information.
>>>
paste mode; Ctrl-C to cancel, Ctrl-D to finish
=== Traceback (most recent call last):
=== File "<stdin>", line 8, in <module>
=== SyntaxError: non-keyword arg after */**
===
Traceback (most recent call last):
File "<stdin>", line 1
SyntaxError: invalid syntax
>>> Traceback (most recent call last):
File "/home/adminpete/.local/bin/mpremote", line 8, in <module>
sys.exit(main())
File "/home/adminpete/.local/lib/python3.8/site-packages/mpremote/main.py", line 1037, in main
do_repl(pyb, args)
File "/home/adminpete/.local/lib/python3.8/site-packages/mpremote/main.py", line 934, in do_repl
do_repl_main_loop(pyb, console, console_out_write, file_to_inject)
File "/home/adminpete/.local/lib/python3.8/site-packages/mpremote/main.py", line 874, in do_repl_main_loop
pyb.soft_reset_with_mount(console_out_write)
File "/home/adminpete/.local/lib/python3.8/site-packages/mpremote/main.py", line 644, in soft_reset_with_mount
self.exec_(fs_hook_code)
File "/home/adminpete/.local/lib/python3.8/site-packages/mpremote/pyboard.py", line 458, in exec_
raise PyboardError("exception", ret, ret_err)
mpremote.pyboard.PyboardError: ('exception', b'\x18\x01\x03\x00\x00\x00/os\x18\x01\x06\x00\x00\x00/os.py\x18\x01\x07\x00\x00\x00/os.mpy\x18\x01\x03\x00\x00\x00/io\x18\x01\x06\x00\x00\x00/io.py\x18\x01\x07\x00\x00\x00/io.mpy\x18\x01', b'\x00\x00\x00/sys\x18\x01\x07\x00\x00\x00/sys.py\x18\x01\x08\x00\x00\x00/sys.mpy')
[adminpete@capybara]: /mnt/qnap2/data/Projects/MicroPython/micropython-micro-gui