11/30/2023 0 Comments How to export a list to a file pythonWe can achieve this by simply calling the json.dumps(object) method, which returns a JSON representation of the object as a plain Python string. for sending as a request payload to an API. It's often useful to dump an object or a list to a string, eg. We've seen how json.dump(list, file) writes a list to a file. It ensures that all keys of every dictionary of our object are output in sorted order. Without it, the output would look like this: Īnother useful parameter to json.dump is sort_keys=True. It pretty-prints our json using 2 spaces as unit of indentation. The json.dump function has a number of useful parameters - here we've used indent=2. Python has a built-in open () function that returns a file-like object which acts as an iterator. We then call json.dump(cities, output_file, indent=2) to actually write the list to the file. Here you will learn alternative ways of getting file data and convert it to a list. The list is looped through and all the items are written one by one. The open() method opens the file in w mode. write() method that writes all the items from the list to a file. Using with statement to open files is a good practice because it ensures that the resource (file) opened with open(FILE_PATH, 'w') is closed after the execution flow leaves the with block. The simplest solution for Python to write the list to a file is to use a file. Once we have our list, we open a file for writing. cities.json: [įirst off, we need to import the json module from Python's standard library. import jsonĪs you might guess, here is our output in. JSON is the way to go, and doing this in Python is as simple as calling a function. Say you have a list of complex objects, or you need a simple way to read the list back into another program. With open(FILE_PATH, 'w') as output_file: No close() statement is required as with open syntax automatically closes the file after executing all statements inside it.Use this method to write items of a Python list one by one to a text file.writelines() is used for inserting multiple strings from a list of strings to the text file simultaneously.write() method inserts a string to a single line in a text file.
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