["python"]
Python, how to read bytes from file and save it?

I want to read bytes from a file and then write those bytes to another file, and save that file. How do I do this?
Here's how to do it with the basic file operations in Python. This opens one file, reads the data into memory, then opens the second file and writes it out. in_file = open("in-file", "rb") # opening for [r]eading as [b]inary data = in_file.read() # if you only wanted to read 512 bytes, do .read(512) in_file.close() out_file = open("out-file", "wb") # open for [w]riting as [b]inary out_file.write(data) out_file.close() We can do this more succinctly by using the with keyboard to handle closing the file. with open("in-file", "rb") as in_file, open("out-file", "wb") as out_file: out_file.write(in_file.read()) If you don't want to store the entire file in memory, you can transfer it in pieces. chunk_size = 4096 # 4 KiB with open("in-file", "rb") as in_file, open("out-file", "wb") as out_file: while True: chunk = in_file.read(chunk_size) if chunk == b"": break # end of file out_file.write(chunk)