Custom sort of directory contents

Question

I have a number of directories containing the files similar to the below example:

test
setup
adder
hello
_CONFIG
TEST2

The file(s) in these directories with the prefix _ represent configuration files of significance. The aim was to have these files appear first when I listed the directory i.e. I would like to be provided with:

_CONFIG
TEST2
adder
hello
setup
test

However, I am using

for element in sorted(os.listdir(path)):
    print(element)

and this provides a list where files starting in uppercase are listed above the _ prefixed files:

TEST2
_CONFIG
adder
hello
setup
test

Is there anyway around this without filtering each file by its first character and printing seperately as this would seem to be overkill.

Thank you

Tom

Answer 1

for element in sorted(os.listdir(path), key=lambda x:x.replace('_', ' ')):
    print(element)

Answer 2

sorted( ..., key = lambda s: ( not s.startswith( "_" ), s ) )