Read Numbers from Text File | Simple Tutorial | #Shorts

This python tutorial for beginners explains how to read numbers from a text file. The code includes opening the file, reading the numbers in that file, converting those numbers from strings into integers, and then printing them. In the python programming language, all text from a file is read as a string.
We start off with the numbers 1, 2, 3 and 4 in a text file. We then use the open function in python to open the file. We then have the option to read the whole file using the read option. If the file is long, then this is not what we want as the whole file is put into memory. Another option is to open the file and read in each line one at a time using a for loop. We tend to use this method.
The open file function in python uses a file handle. This file handle acts like a pointer to the file contents such that it can be used as an iterator to loop through each line. The contents of the file are treated like one long string with each line separated by a new line character. We must remove this new line character with the python strip function if we wish to print the contents without the additional blank line.
Finally, we chose to read a file containing numbers to illustrate the need to convert numbers from a string into integers or floating point numbers. In this example we duplicate the numbers by two. If we do not convert the strings then they are repeated, if we convert the numbers to integers then the numbers are doubled.

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