Python read and write dictionary to file

We can change the format of the string as per requirement. Finally closing the file using the close method. Instead of keys , we can use items to write dictionary to file. Let us understand with an example. In this post, we have learned 5 different ways to Write Dictionary to a text file in Python with code examples. Next Compute the histogram of nums against the bins using NumPy.

Recommended Articles. Python - Combine two dictionaries having key of the first dictionary and value of the second dictionary. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Maybe give me an example of how i could make this code work?

When you read the dictionary from file the result is string and you cant tread with as a dictionary! This includes most class instances, recursive data types, and objects containing lots of shared sub-objects.

The keys are ordinary strings. You could use the pickle library so you write e. Using pickle can have a possible security issue, whereby Python code can be ran upon loading the pickle. If a malicious user has replaced your pickle file with some malicious code then you're in trouble.

Python has a builtin json module which can provide loading and dumping data. The code below is a toy example which does this with a dictionary. If you wish to re-read this in later you can use the below code:. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? It is dynamic and mutable in nature. Each item of a dictionary is a key-value pair.

The keys present in the dictionary must be unique. We can save dictionary to file in python in various ways. Below we have discussed some of the methods to write dictionary to file in python. Top 14 Application of Python What is Python used for? Python has an in-built package named as json to support JSON. To know about json package and method read here. In this method, we just convert the dictionary into a string and write that string into the file.

To convert a dictionary to a string we use the str function.