Python: Fastest way to read large text files
The speed of reading a large text file in Python can depend on various factors, including the size of the file, the available memory, and the characteristics of the storage…
How to read data from a file in Java
Suppose we have a data file containing two columns of tab-delimited integers as follows: 2 3 4 6 6 9 ... The following example fetches data from this file and…
bash: How to change file extensions
This post shows how to change file extensions using bash. To change file extensions, we simple need to loop through file in a directory and use the “mv” command to…
bash: renaming files in a directory
Suppose you have 2000 photos in a directory and you need to rename them. The files are named as: We need to rename them as follows: Here is how: j…
Python File Management
This page shows how to work with text files using Python3 code. Following is a sample txt file we will be using. Lets called it stocks.txt Reading from File You…
Python code to work with Excel files
Note: The instructions are for python3.x on Ubuntu There are several different libraries you can use to easily work with Excel. I will be covering openpyxl. Other options include xlsxwriter,…
Reading files in a directory using bash
The following code reads files in a directory called SQL. Then if runs an SQL command with the file name as input. Finally, it deletes the file from the directory.