Struct module in Python ! Pack and unpack

Question

import struct , it is a python module comes with distro .it can pack and unpack any data . I love this module because i pack all userinfo of my website and add it as a single entry to database . here is how :D

import struct
userid , username , userpassword , verified = 5 , "sun" , "password" , True #my sample datas
packeddata = struct.pack("i{0}p{1}p?".format(len(username)+1,len(userpassword)+1) , userid , bytes(username,'utf-8') , bytes(userpassword,'utf-8') , verified )

#here my data is packed , im packing strings as bytes

#to unpack it we need to memorize the syntax of packing , here its "i4p9p?" the python official doc has the meaning of #these symballs
struct.unpack("i4p9?",packeddata) #will give a tuple of data's we packed

now a fun example , we will convert hex color codes to rgb ( R , G , B ) format.
`
import struct
myhex = 'ff0000' # its red :D cause why not
struct.unpack('BBB',bytes.fromhex(myhex)) #will give (255,0,0) cause its red

#RGB to hex . yeah (255,0,0) to #ff0000
import struct , codecs
rgb = (255,0,0) # again red :D
codecs.encode(struct.pack('BBB',*rgb),'hex').decode()
#will return "ff0000"

have fun with struct module , docs has more of it

Answer 1

grt 👌👌👌