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This tutorial explains various ways to save dictionaries to files using Python. The methods include:

• The Python picklemodule's dump()function.
• NumPyFunctions of the library save().
• Functions of Python jsonmodules .dump()

In Python, use the function pickleof the module dumpto save the dictionary to a file

The following code example shows how we can use the save function pickleof the module dump()to save a dictionary and load()read the dictionary from the saved file using the read function. The save function pickleof the module dump()requires the dictionary we want to save and a file object as arguments in order to save the dictionary as .pkla file.

import pickle

my_dict = {"Apple": 4, "Banana": 2, "Orange": 6, "Grapes": 11}

with open("myDictionary.pkl", "wb") as tf:
    pickle.dump(my_dict, tf)

The following code example shows how to use load()the function to read a dictionary saved in a file. load()The function requires a file object as a parameter .pklto load a dictionary from a file.

import pickle

with open("myDictionary.pkl", "wb") as tf:
    new_dict = pickle.load(tf)

print(new_dict.item())

Output:

{ 'Apple': 4, 'Banana': 2, 'Orange': 6, 'Grapes': 11}

In Python, use NumPythe library's savefunction to save a dictionary to a file.

NumPyThe library's save()save function can also save the dictionary in a file. To save the dictionary to .npya file, save()the function requires as parameters the name of the file we want to save and the dictionary to save to the file.

Code example:

import numpy as np

my_dict = {"Apple": 4, "Banana": 2, "Orange": 6, "Grapes": 11}
np.save("file.npy", my_dict)

This code example shows how to read .npya Python dictionary saved as a .txt file. NumPyThe library's load().txt function requires a file name and allow_picklethe .txt parameter needs to be set to .txt in order to load a saved dictionary Truefrom a .txt file..npy

Code example:

import numpy as np

new_dict = np.load("file.npy", allow_pickle="TRUE")
print(new_dict)

In Python, use the function jsonof the module dumpto save a dictionary to a file.

Another way to save a dictionary to a file in Python is by using the save function jsonof the module dump(). It also takes as arguments the variable we want to save dictand the file object to save the dictionary to .jsona file.

Sample code:

import json

my_dict = {"Apple": 4, "Banana": 2, "Orange": 6, "Grapes": 11}

tf = open("myDictionary.json", "w")
json.dump(my_dict, tf)
tf.close()

The following is a code example of using the function jsonof the module loadto read a dictionary saved as a file. load()The function requires a file object as a parameter and .jsonloads a dictionary from the file.

import json

tf = open("myDictionary.json", "r")
new_dict = json.load(tf)
print(new_dict)