--Originally published at My B10g
When reading or writing a text file in python you can use the built in library of python to do so. The first step is to open the file and assign it to a variable for practical use (when you open a file you must define what you will be doing with it and to do so you need to use “r” for reading, “w” for writing, “a” appending or “r+”for reading and writing ) . example:
file = open("hola.txt", 'r')
this mean I want to read file hola.txt
but to get what is in the file you can use:
file.read()
(to read all the file)
file.read(5)
(to read the first 5 characters)
file.readline()
(to read a complete line)
file.readlines()
(to read a list of strings of all the lines in the file)
To write in the file:
file.write("String")
(to write a string in a file)
file.writelines(variable)
(to write a list of strings separated by lines in the file )
When you do it this way you have to close the file at the end to optimize the program:
file.close()
But there are other ways to do it
using (with) there is no need to close the file.
with open("hello.txt", "w") as file:
file.write("Hello World")
and you can do exactly the same things but writing less code.
