msoffcrypto-tool encrypted.docx decrypted.docx -p Passw0rd
import msoffcrypto
encrypted = open("encrypted.xlsx", "rb")
file = msoffcrypto.OfficeFile(encrypted)
file.load_key(password="Passw0rd") # Use password
with open("decrypted.docx", "wb") as f:
file.decrypt(f)
encrypted.close()