Python write json with double quotes

Question

I see that the OP wanted JSON, but I do not want JSON and pprint is so close to giving me what I do want: black-compatible Python source, which requires that I use " instead of '.

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Python Basic: Exercise-130 with Solution
Visualize Python code execution:
Python: Tips of the Day
How do I allow double quotes in JSON?
Can you use a double quote inside a JSON string?
Is JSON single quote or double quote?
Should JSON be double quotes?

I settled on .replace("'", '"') with pformat(), although this is both ugly and fragile ☹️:

import pprint

# Note: my code auto-generates my_dict parsing a file (not black-formatted here)
my_dict = ["spam", "eggs", "lumberjack", "knights", "ni", "eggs", "lumberjack", "knights", "ni"]

pprinter = pprint.PrettyPrinter(indent=4)
formatted_code = (
    pprinter.pformat(my_dict)
    .replace("[ ", "[\n  ")  # break after opening bracket
    .replace("']", "',\n]")  # break before closing bracket, add comma
    .replace("'", '"')  # use double quotes
)
with open("example_module.py", "w", encoding="utf-8") as outfile:
    outfile.write('"""Module containing auto-generated ALL_MR_HEADERS."""\n')
    outfile.write(f"ALL_MR_HEADERS = {formatted_code}\n")

The resulting example_module.py is black-compliant.

Last update on August 19 2022 21:51:40 (UTC/GMT +8 hours)

Python Basic: Exercise-130 with Solution

Write a Python program to use double quotes to display strings.

Pictorial Presentation:

Sample Solution:-

Python Code:

import json
print(json.dumps({'Alex': 1, 'Suresh': 2, 'Agnessa': 3}))

Sample Output:

{"Agnessa": 3, "Alex": 1, "Suresh": 2}

Flowchart:

Visualize Python code execution:

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Python Code Editor:

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Python: Tips of the Day

Combining two iterable of tuples or pivot nested iterables:

# Combining two iterables
>>> a = [1, 2, 3]
>>> b = ['a', 'b', 'c']
>>> z = zip(a, b)
>>> z
[(1, 'a'), (2, 'b'), (3, 'c')]

# Pivoting list of tuples
>>> zip(*z)
[(1, 2, 3), ('a', 'b', 'c')]

convert single quote json data file to double quote json data file (without mangling inner quotes)

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	__author__ = 'mbrzustowicz'

	# metadata.json has single quotes like this
	# {'asin': 'B00M0AEPXG', 'imUrl': 'http://ecx.images-amazon.com/images/I/51hcXTUeHLL._BO2,204,203,200_ ..... }
	# so the strategy is to read each line as a string, and dump into a REAL json file

	import json
	import ast

	fr=open("/Users/mbrzustowicz/Downloads/metadata.json")
	fw=open("/Users/mbrzustowicz/amazon_product_metadata.json", "w")

	for line in fr:
	json_dat = json.dumps(ast.literal_eval(line))
	dict_dat = json.loads(json_dat)
	json.dump(dict_dat, fw)
	fw.write("\n")

	fw.close()
	fr.close()

How do I allow double quotes in JSON?

If you're making a . json text file/stream and importing the data from there then the main stream answer of just one backslash before the double quotes: \" is the one you're looking for.