exception BaseException The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception). If str() is called on an instance of this class, the representation of the argument(s) to the instance are returned, or the empty string when there were no arguments. args The tuple of arguments given to the exception constructor. Some built-in exceptions (like OSError) expect a certain number of arguments and assign a special mean

base64.urlsafe_b64encode(s) Encode bytes-like object s using the URL- and filesystem-safe alphabet, which substitutes - instead of + and _ instead of / in the standard Base64 alphabet, and return the encoded bytes. The result can still contain =.

base64.urlsafe_b64decode(s) Decode bytes-like object or ASCII string s using the URL- and filesystem-safe alphabet, which substitutes - instead of + and _ instead of / in the standard Base64 alphabet, and return the decoded bytes.

base64.standard_b64encode(s) Encode bytes-like object s using the standard Base64 alphabet and return the encoded bytes.

base64.standard_b64decode(s) Decode bytes-like object or ASCII string s using the standard Base64 alphabet and return the decoded bytes.

base64.encodestring(s) Encode the bytes-like object s, which can contain arbitrary binary data, and return bytes containing the base64-encoded data, with newlines (b'\n') inserted after every 76 bytes of output, and ensuring that there is a trailing newline, as per RFC 2045 (MIME). encodestring is a deprecated alias.

base64.encodebytes(s) base64.encodestring(s) Encode the bytes-like object s, which can contain arbitrary binary data, and return bytes containing the base64-encoded data, with newlines (b'\n') inserted after every 76 bytes of output, and ensuring that there is a trailing newline, as per RFC 2045 (MIME). encodestring is a deprecated alias.

base64.encode(input, output) Encode the contents of the binary input file and write the resulting base64 encoded data to the output file. input and output must be file objects. input will be read until input.read() returns an empty bytes object. encode() inserts a newline character (b'\n') after every 76 bytes of the output, as well as ensuring that the output always ends with a newline, as per RFC 2045 (MIME).

base64.decodestring(s) Decode the bytes-like object s, which must contain one or more lines of base64 encoded data, and return the decoded bytes. decodestring is a deprecated alias. New in version 3.1.

base64.decodebytes(s) base64.decodestring(s) Decode the bytes-like object s, which must contain one or more lines of base64 encoded data, and return the decoded bytes. decodestring is a deprecated alias. New in version 3.1.