Mastering Python for Networking and Security

Opening a file

The classic way of working with files is to use the open() method. This method allows you to open a file, returning an object of the file type:

open(name[, mode[, buffering]])

The opening modes of the file can be r(read), w(write), and a(append). We can add to these the b (binary), t (text), and + (open reading and writing) modes. For example, you can add a "+" to your option, which allows read/write to be done with the same object:

>>> my_file=open("file.txt","r”)

To read a file, we have several possibilities:

• The readlines() method that reads all the lines of the file and joins them in a sequence. This method is very useful if you want to read the entire file at once: >>> allLines = file.readlines().

• If we want to read ...