Search through the output of a command for a specific regex pattern in Python

run_grep.py

import subprocess
import os
import re

def search(string:str, pattern:str) -> bool:
    x = re.search(pattern, string)
    if x:
        return True
    return False

def run(command:str) -> str:
    p = subprocess.run(command.split(),
                            stdout=subprocess.PIPE,
                            stderr=subprocess.STDOUT)
    output = p.stdout.decode()
    return output


patt = "Documents"
out = run(f"ls {os.environ['HOME']}")

print("OUTPUT")
print("------")
print(out)

print(f"SEARCH RESULT: {patt}")
print("-------------")
print(search(out, patt))