Creating dictionary file using a csv file in python

Question

import csv

keys = ["id", "name", "age", "height", "weight"]
 
with open('temp.csv', 'w') as temp_file:
    dict_writer_obj = csv.DictWriter(temp_file, fieldnames = keys) 
    
    with open('dictReader.csv','r') as file:
        dict_reader_obj = csv.DictReader(file) 
        
        dict_writer_obj.writeheader()
        dict_writer_obj.writerows(file)

I want to convert a csv file called dictReader.csv file into dictionary based file: However I am getting the following error. Any ideas? AttributeError: 'str' object has no attribute 'keys'

My dictReader.csv file content:

id,name,age,height,weight
1,Alice,20,62,120.6
2,Freddie,21,74,190.6
3,Bob,17,68,120.0

Desired output file called temp.csv with this format


{'id': '1', 'name': 'Alice', 'age': '20', 'height': '62', 'weight': '120.6'}
{'id': '2', 'name': 'Freddie', 'age': '21', 'height': '74', 'weight': '190.6'}
{'id': '3', 'name': 'Bob', 'age': '17', 'height': '68', 'weight': '120.0'}

Did you mean "dictionary based file" as originally written , or perhaps a Python "dictionary object" that can be used in code? — Wizard.Ritvik
– Wizard.Ritvik, Commented Oct 29, 2021 at 15:43
What is what you really want to do, your code is just reading from one csv and trying to write to the other one — Dani Mesejo
– Dani Mesejo, Commented Oct 29, 2021 at 15:49
"dictionary based file", do you mean a JSON-file? Please show us an example of what you want the output to look like, to compliment your description. — Hampus Larsson
– Hampus Larsson, Commented Oct 29, 2021 at 15:51
Does this answer your question? Convert CSV to JSON file in python — Hampus Larsson
– Hampus Larsson, Commented Oct 29, 2021 at 15:57

OscarsPapa · Accepted Answer · 2021-10-29 16:02:25Z

1

To improve on the other user's answer a bit, you can still use writerows like this.

import csv

keys = ["id", "name", "age", "height", "weight"]
 
with open('temp.csv', 'w') as temp_file:
    dict_writer_obj = csv.DictWriter(temp_file, fieldnames = keys) 

    with open('dictReader.csv','r') as file:
        dict_reader_obj = csv.DictReader(file) 
        dict_writer_obj.writeheader()
        # Here:
        dict_writer_obj.writerows(row for row in dict_reader_obj)

answered Oct 29, 2021 at 16:02

OscarsPapa

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milt_on · Accepted Answer · 2021-10-29 16:09:21Z

0

Just change:

dict_writer_obj.writerows(file)

to:

dict_writer_obj.writerows(row for row in dict_reader_obj)

Or row by row using .writerow():

for row in dict_reader_obj:
    dict_writer_obj.writerow(row)

edited Oct 29, 2021 at 16:09

answered Oct 29, 2021 at 15:55

milt_on

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