# brintOS Python witness (BRINTOS-28): one line per requirement probe.
import sys
print("P1-ver", sys.version.split()[0])
print("P2-arith", 6 * 7)
def fib(n):
    return n if n < 2 else fib(n - 1) + fib(n - 2)
print("P2-fib15", fib(15))
print("P2-str", "abc".upper() + "/" + str(len("hello")))
print("P2-list", sorted([2, 1, 3, 3]), len(["a", "b", "c"]))
print("P2-dict", {k: k * k for k in range(4)}[3])
print("P3-utf8", "é".encode("utf-8").decode("utf-8") == "é")
import json
print("P3-json", json.loads(json.dumps({"a": [1, 2, 3]}))["a"][2])
import os
print("P4-exists", os.path.isdir("/bin"))
print("P4-pwd", os.getcwd())
print("INFO-prefix", sys.prefix)
print("ALL-PYTHON-OK")