error in updating the list of json strings using python3

Question

I am trying to insert another key:value list of the data while print/storing in another result. Here is what I did till now:

>>> data = list()
>>> data.append({'data':'a','name':'alpha'})
>>> data.append({'data':'b','name':'beta'})
>>> data.append({'data':'c','name':'charlie'})
>>> data
[{'data': 'a', 'name': 'alpha'}, {'data': 'b', 'name': 'beta'}, {'data': 'c', 'name': 'charlie'}]
>>> names = []
>>> count = 0
>>> for i in data:
...     names.append(data[count]['name'])
...     count = count + 1
...
>>> names
['alpha', 'beta', 'charlie']
>>> txt = 'alpha'
>>> res = process.extract(txt,names)
>>> res
[('alpha', 100), ('charlie', 33), ('beta', 22)]
>>> for name, score in res:
...     print(data[names.index(name)])
...
{'data': 'a', 'name': 'alpha'}
{'data': 'c', 'name': 'charlie'}
{'data': 'b', 'name': 'beta'}
>>> for name, score in res:
...     print(data[names.index(name)]['score'] = score)
...
  File "<stdin>", line 2
SyntaxError: keyword can't be an expression

Kindly, let me know what I need to do, do that I get the result with added key:value. I am trying to get the output like this:

{'data': 'a', 'name': 'alpha', 'score': 100}
{'data': 'c', 'name': 'charlie', 'score': 33}
{'data': 'b', 'name': 'beta', 'score': 22}

you cannot `print` and assign at the same time. Just assign, and print result later. — Jean-François Fabre, Jul 21 '17 at 11:43
@Jean-FrançoisFabre I tried like this `result = (data[names.index(name)]['score'] = score)` still not working. Please can you share something workable for me. please. — Jaffer Wilson, Jul 21 '17 at 11:45
I am getting this error `>>> for name, score in res: ... (data[names.index(name)]['score'] = score) File "", line 2 (data[names.index(name)]['score'] = score) ^ SyntaxError: invalid syntax` now what I need to do. — Jaffer Wilson, Jul 21 '17 at 11:49
@Jean-FrançoisFabre I don't think so that the my question is related with any of the references. But anyways thank you. — Jaffer Wilson, Jul 21 '17 at 12:06
it is closely related: assigning to a variable isn't like C: you cannot assign, then use the "returned value". It's not syntaxically correct. So yes, it's the same issue you have (or else I wouldn't have thought of those duplicates) — Jean-François Fabre, Jul 21 '17 at 12:08

bruno desthuilliers · Answer 1 · 2017-07-21T11:56:16.590

2

In Python, assignment (here data[names.index(name)]['score'] = score) is a statement, so you cannot use it where an expression is expected. You have to first do the assignment, then print the result, ie replace this:

for name, score in res:
    print(data[names.index(name)]['score'] = score)

with:

for name, score in res:
    index = names.index(name)
    data[index]['score'] = score
    print data[index]

As a side note:

names = []
count = 0
for i in data:
    names.append(data[count]['name'])
    count = count + 1

is an incredibly complicated way to write:

names = [item["name"] for item in data]

edited Jul 21 '17 at 11:56

answered Jul 21 '17 at 11:46

bruno desthuilliers

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you should explain why OP is wrong, not just dump working code. – Jean-François Fabre Jul 21 '17 at 11:51
Indeed... Done. – bruno desthuilliers Jul 21 '17 at 11:56

score 0 · Answer 2 · answered Jul 21 '17 at 11:50

0

Replace

for name, score in res:
    print(data[names.index(name)]['score'] = score)

with

for name, score in res:
    for d in data:
        if d['name']==name:
            d['score'] = score

Though it might be a better approach to use classes.

answered Jul 21 '17 at 11:50

Joe

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error in updating the list of json strings using python3

2 Answers2