import os exe_path = 'C:/Users/jbranan/Documents/Scripts/EFTAESCrypto/EFTAESCrypto.exe' CT = 'snyqOzREAMFSs5KZxVa3Yw==' IV = 'UtJcljHYNMN9LKdfMQ+s1A==' fc = f'cmd /k {exe_path} Decrypt -m {CT} -e base64 –I {IV} --ivEncodeMode base64 –k E97D235BDC02002568874BB69E6D8DD2BF4D2BDD34BCBEE476C84C23AE93A9D6 -c CBC' print(fc) # os.system(fc)