import base64
import hashlib

def calc_code_challenge(code_verifier: str) -> str:
    sha256_digest = hashlib.sha256(code_verifier.encode()).digest()
    b64_encoded = base64.urlsafe_b64encode(sha256_digest).decode()
    return b64_encoded.rstrip("=")

code_verifier = "1E5i34xbb0L1X2gfKopuXAbzsuIqBuhQX60GzXSZ1jY"
code_challenge = calc_code_challenge(code_verifier)
print(code_challenge)