Checksum can be used to detect if data is corrupted during network transmission (e.g. a bit flips from 0 to 1). Write a program Checksum.py to calculate the CRC-32 checksum for a file entered as command-line argument. File should be placed in the same folder as Checksum.py. You may use the crc32() function from the zlib library to calculate the CRC-32 checksum Firstly, you will need to read all the bytes from a file and store them into a bytes object. You should open the file with binary reading mode by using rb as the mode argument of open(). Then, you can call the read() method of the file object and get the entire file content in a bytes object. Now you can get the checksum by directly calling crc32() with the file data, and finally print this unsigned 32-bit checksum. An example code snippet is given below. with open(" test . jpg ", "rb") as f: bytes = f. read () checksum = zlib . crc32 ( bytes )