py_compile fails to read a list of filenames to be compiled from standard input.  This is a regression in 3.10.

example

files-to-compile.txt is a text file containing hello.py and goodbye.py on separate lines.  hello.py and goodbye.py must exist.

python3.10 -m py_compile - <files-to-compile.txt
[Errno 2] No such file or directory: 'hello.py\n'

python3.9 -m py_compile - <files-to-compile.txt

python3.9 produces no output, but a __pycache__ directory is created and contains the byte-code files.