I am so stuck at decoding an encoded image, Mind help?

base64.py

#encoder:
import base64

_userOriginalBinaryfile = input("Please Enter the Location of the file design to encrypt:  ")
with open(_userOriginalBinaryfile, "rb") as _inputFile:
      _input_file_data = _inputFile.read()
      _encodeData = base64.b64encode(_input_file_data)
      _encodeMessage = _encodeData.decode("utf-8")

      print(_encodeMessage)




## decoder:
import base64

_encryptedBinaryData = input("Please Enter The {encryptedBinaryData} for decryption: ")
_base64_binary_bytes = _encryptedBinaryData.encode("utf-8")
with open("_decoded_Binary_data.png", "wb") as _saveFile: #Change Extension as wish
      _decoded_data = base64.decodebytes(bytes(_base64_binary_bytes)).strip() #<------------this gave me exception "incorrect padding"
      _saveFile.write(_decoded_data)

See: https://gist.github.com/routonmh/2c3486ad33195bc80ea2d6805a3bdd2d