> pip3 freeze | grep google
google-api-core==1.4.0
google-auth==1.5.1
google-cloud-core==0.28.1
google-cloud-storage==1.11.0
google-resumable-media==0.3.1
googleapis-common-protos==1.5.3

/usr/local/lib/python3.6/dist-packages/google/cloud/storage/blob.py:538: in download_to_file                                                                                           
    transport, file_obj, download_url, headers, start, end)                                                                                                                            
/usr/local/lib/python3.6/dist-packages/google/cloud/storage/blob.py:480: in _do_download                                                                                               
    download.consume(transport)                                                                                                                                                        
/usr/local/lib/python3.6/dist-packages/google/resumable_media/requests/download.py:174: in consume
    self._write_to_stream(result)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <google.resumable_media.requests.download.Download object at 0x7f81c0f38cf8>, response = <Response [200]>

    def _write_to_stream(self, response):
        """Write response body to a write-able stream.
    
            .. note:
    
                This method assumes that the ``_stream`` attribute is set on the
                current download.
    
            Args:
                response (~requests.Response): The HTTP response object.
    
            Raises:
                ~google.resumable_media.common.DataCorruption: If the download's
                    checksum doesn't agree with server-computed checksum.
            """
        expected_md5_hash = self._get_expected_md5(response)                                                                                                                  [20/1803]
    
        if expected_md5_hash is None:
            md5_hash = _DoNothingHash()
        else:
            md5_hash = hashlib.md5()
        with response:
            # NOTE: This might "donate" ``md5_hash`` to the decoder and replace
            #       it with a ``_DoNothingHash``.
            local_hash = _add_decoder(response.raw, md5_hash)
            body_iter = response.iter_content(
                chunk_size=_SINGLE_GET_CHUNK_SIZE, decode_unicode=False)
            for chunk in body_iter:
                self._stream.write(chunk)
                local_hash.update(chunk)
    
        if expected_md5_hash is None:
            return
    
        actual_md5_hash = base64.b64encode(md5_hash.digest())
        # NOTE: ``b64encode`` returns ``bytes``, but ``expected_md5_hash``
        #       came from a header, so it will be ``str``.
        actual_md5_hash = actual_md5_hash.decode(u'utf-8')
        if actual_md5_hash != expected_md5_hash:
            msg = _CHECKSUM_MISMATCH.format(
                self.media_url, expected_md5_hash, actual_md5_hash)
>           raise common.DataCorruption(response, msg)
E           google.resumable_media.common.DataCorruption: Checksum mismatch while downloading:
E           
E             https://www.googleapis.com/download/storage/v1/b/****/o/******.png?alt=media
E           
E           The X-Goog-Hash header indicated an MD5 checksum of:
E           
E             rlofKEyAqWgDmEc3WO61BA==
E           
E           but the actual MD5 checksum of the downloaded contents was:
E           
E             h9fia1VRkKYNo656ukQ4hQ==

/usr/local/lib/python3.6/dist-packages/google/resumable_media/requests/download.py:137: DataCorruption