python read funciton code example

Example: read function in python

Syntax: file.read(fd, n)

Parameter:
fd: A file descriptor representing the file to be read.
n: Optional. An integer value denoting the number of bytes to be read from the file associated with the given file descriptor fd.
   The number of bytes to return. Default -1, which means the whole file.

Return Type: This method returns a bytestring which represents the bytes read from the file associated with the file descriptor fd.