For the test I made 100.000 lines in a csv file with copy/paste, and the whole conversion takes about half a second with Apple’s M1 Chip while the presented example took only 0.0005 seconds.You may write the JSON String to a JSON file.with open (csvFilename, encoding 'utf-8') as csvfile: with open (jsonFilename, 'w', encoding 'utf-8') as jsonfile: jsonfile.write (json. Convert the Python List to JSON String using json.dumps(). We will convert the CSV file into a JSON file with the help of a simple Python program as scripted below.Add the dictionary to the Python List created in step 1. Read the lines of CSV file using csv.DictReader() function.To convert CSV to JSON in Python, follow these steps: Since I have more than 2000 rows, it is not a feasible solution.Ĭan anyone suggest how to parse CSV file line by line and convert it into JSON without specifying fieldnames? Answer by Milovan Tomašević Python CSV to JSON write ( ' \n ' )īut the problem with above code is that we need to mention the field names to parse the CSV. DictReader ( csvfile, fieldnames ) for row in reader : json. Call open(pathname, mode) with the file name as pathname and r as mode to return a file object that has. Import csv import json csvfile = open ( 'file.csv', 'r' ) jsonfile = open ( 'file.json', 'w' ) fieldnames = ( "FirstName", "LastName", "IDNumber", "Message" ) reader = csv.
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