eof True if the end-of-stream marker has been reached. New in version 3.3.

compress(data) Provide data to the compressor object. Returns a chunk of compressed data if possible, or an empty byte string otherwise. When you have finished providing data to the compressor, call the flush() method to finish the compression process.

unused_data Data found after the end of the compressed stream. If this attribute is accessed before the end of the stream has been reached, its value will be b''.

class bz2.BZ2Compressor(compresslevel=9) Create a new compressor object. This object may be used to compress data incrementally. For one-shot compression, use the compress() function instead. compresslevel, if given, must be a number between 1 and 9. The default is 9. compress(data) Provide data to the compressor object. Returns a chunk of compressed data if possible, or an empty byte string otherwise. When you have finished providing data to the compressor, call the flush() method to fin

bytes.zfill(width) bytearray.zfill(width) Return a copy of the sequence left filled with ASCII b'0' digits to make a sequence of length width. A leading sign prefix (b'+'/ b'-' is handled by inserting the padding after the sign character rather than before. For bytes objects, the original sequence is returned if width is less than or equal to len(seq). For example: >>> b"42".zfill(5) b'00042' >>> b"-42".zfill(5) b'-0042' Note The bytearray version of this method does not o

exception BytesWarning Base class for warnings related to bytes and bytearray.

bytes.upper() bytearray.upper() Return a copy of the sequence with all the lowercase ASCII characters converted to their corresponding uppercase counterpart. For example: >>> b'Hello World'.upper() b'HELLO WORLD' Lowercase ASCII characters are those byte values in the sequence b'abcdefghijklmnopqrstuvwxyz'. Uppercase ASCII characters are those byte values in the sequence b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'. Note The bytearray version of this method does not operate in place - it always p

bytes.translate(table[, delete]) bytearray.translate(table[, delete]) Return a copy of the bytes or bytearray object where all bytes occurring in the optional argument delete are removed, and the remaining bytes have been mapped through the given translation table, which must be a bytes object of length 256. You can use the bytes.maketrans() method to create a translation table. Set the table argument to None for translations that only delete characters: >>> b'read this short text'.t

bytes.title() bytearray.title() Return a titlecased version of the binary sequence where words start with an uppercase ASCII character and the remaining characters are lowercase. Uncased byte values are left unmodified. For example: >>> b'Hello world'.title() b'Hello World' Lowercase ASCII characters are those byte values in the sequence b'abcdefghijklmnopqrstuvwxyz'. Uppercase ASCII characters are those byte values in the sequence b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'. All other byte value

bytes.swapcase() bytearray.swapcase() Return a copy of the sequence with all the lowercase ASCII characters converted to their corresponding uppercase counterpart and vice-versa. For example: >>> b'Hello World'.swapcase() b'hELLO wORLD' Lowercase ASCII characters are those byte values in the sequence b'abcdefghijklmnopqrstuvwxyz'. Uppercase ASCII characters are those byte values in the sequence b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'. Unlike str.swapcase(), it is always the case that bin.swap