find . -type f ( -iname '*foo*' ! -name '.*' )

import subprocess

cmd = ["find", ".", "-type", "f", "(", "-iname", "*foo*", "!", "-name", ".*", ")"]
sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print sp.communicate()[0].split()

import subprocess
cmd = 'find . -type f -iname "*foo*" ! -name ".*"'
sp = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print sp.communicate()[0].split()

cmd = "find . -type f -iname *foo* ! -name .\*"
print(cmd)
ret = subprocess.run(cmd, shell=True, capture_output=True)
print(ret)

$ find . -type f -iname *foo* ! -name .*
./foobar.txt
./barfoo.txt

$ ./findfoo.py
find . -type f -iname *foo* ! -name .*
CompletedProcess(args='find . -type f -iname \*foo\* ! -name .\*',
 returncode=0, stdout=b'./foobar.txtn./barfoo.txtn', stderr=b'')

cmd = ["find", ".", "-type", "f", "\(", "-iname", "\*foo\*", "!", "-name", ".\*", "\)"]

cmd = ["find", ".", "-type", "f", "-iname", "\*foo\*", "!", "-name", ".\*"]