internet data handling and encoding b_hex(stringconverts string of hexadecimal digits to binary data this function is also called as unhexlify(stringb a_hex(dataconverts string of binary data to hexadecimal encoding this function is also called as hexlify(dataa b_hqx(stringconverts string of binhex -encoded data to binary without performing rle (runlength encodingdecompression rledecode_hqx(dataperforms an rle decompression of the binary data in data returns the decompressed data unless the data input is incompletein which case the incomplete exception is raised rlecode_hqx(dataperforms binhex rle compression of data a_hqx(dataconverts the binary data to string of binhex -encoded ascii characters data should already be rle-coded alsounless data is the last data fragmentthe length of data should be divisible by crc_hqx(datacrccomputes the binhex crc checksum of the byte string data crc is starting value of the checksum crc (data [crc]computes the crc- checksum of the byte string data crc is an optional initial crc value if omittedcrc defaults to csv the csv module is used to read and write files consisting of comma-separated values (csva csv file consists of rows of texteach row consisting of values separated by delimiter charactertypically comma (,or tab here' an exampleblues,elwood," addison","chicagoil "," ", , variants of this format commonly occur when working with databases and spreadsheets for instancea database might export tables in csv formatallowing the tables to be read by other programs subtle complexities arise when fields contain the delimiter character for instancein the preceding exampleone of the fields contains comma and must be placed in quotes this is why using basic string operations such as split(','are often not enough to work with such files lib fl ff