What's the type of read() function's return value?

Question

I wanna read first 188 bytes from a binary file, and check whether the first character is 0x47. Code below:

import os
fp=open(\"try.ts\",\"rb\")
for         


        

Answer 1

1. What's the type of a return value in read() function?

You mean the method read of type file. The command help(file.read) gives:

read([size]) -> read at most size bytes, returned as a string.

If the size argument is negative or omitted, read until EOF is reached. Notice that when in non-blocking mode, less data than what was requested may be returned, even if no size parameter was given.

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2. How can I get the first character in a string or array?

Just like you did, [0].