Python: Get last N lines of a text file, like tail command
In this article, we will discuss a memory-efficient solution to read the last line or last N lines from a text or CSV file in python. Then we will also…
Python: How to append a new row to an existing csv file?
In this article, we will discuss how to append a row to an existing csv file using csv module's reader / writer & DictReader / DictWriter classes. (more…)
Python: Add a column to an existing CSV file
In this article we will discuss how to add a column to an existing CSV file using and classes. A part from appending the columns we will also discuss how…
Python: How to delete specific lines in a file in a memory-efficient way?
In this article, we will discuss different ways to delete specific lines from a file either by line number, by matching content or based on any custom logic. (more…)
Check the first or last character of a string in python
In this article, we will discuss different ways to check the content of the first or last character of a string in python. (more…)
Python: Get file size in KB, MB or GB – human-readable format
In this article, we will discuss different ways to get file size in human-readable formats like Bytes, Kilobytes (KB), MegaBytes (MB), GigaBytes(GB) etc. (more…)
Python: Three ways to check if a file is empty
In this article, we will discuss different ways to check if a file is empty its size is 0 using () or () or by reading its first character. (more…)
Python: Search strings in a file and get line numbers of lines containing the string
In this article, we are going to discuss, how to search for single or multiple strings in a file and get all the matched lines along with their line numbers.…
How to append text or lines to a file in python?
In this article, we will discuss how to append text or new lines to an existing file using python. (more…)
Python: How to get Last N characters in a string?
In this article, we will discuss how to fetch the last N characters of a string in python. This N can be 1 or 4 etc. (more…)