When you write Python scripts, you may want to perform certain actions, such as reading or writing to a file, only if the file exists.

You can save the NumPy array to a text file using the savetxt() function.

If you work with data structures, such as dictionaries, you may wonder whether you can add or append an item the same way as you can do it with a list? Read the rest of the article to find out.

The replace() function searches for a specified pattern in a string and replaces it with another specified string.

The hex() function can be used to convert a string to a hexadecimal value. Before using the function the value has to be converted to bytes.

This is a tutorial on how to convert hexadecimal numbers to strings in Python. When working with hex numbers, it can be difficult to read or compare them, so converting them to strings will make the process easier.

Python offers several file access modes. One of them is “append”. This mode allows you to place the cursor at the end of the text file to insert the new lines there.

Elements from the list (including strings) can be deleted using the remove() function.

Function json.loads() accepts JSON string and converts it to Python dictionary (deserialization). The last letter in load(s) stands for “string”.

To write to a text file in Python, you have to use the open() and write() functions. The open() function takes two parameters: file name and file access mode. The returned value of open() is the file object.