how to convert string to array with values in python

Question

We do have this string:

{"transaction_invoiceno":"11111","fallback":false,"emvTags":"null"}

How to convert this string to list or array so we can get values and print them, for example:

transaction_invoiceno = 11111
fallback = false
emvTags = null

You are using double quote inside a string which is enclosed using double quote, which is wrong. Is it a file or a string? — Amit Vikram Singh, Apr 16 '21 at 12:58
You can try using `d = json.loads(your_string)`. After this you can access your variable using `d['transaction_invoiceno']` — Amit Vikram Singh, Apr 16 '21 at 12:59

Johnny John Boy · Answer 1 · 2021-04-16T13:24:22.473

You can use the inbuilt json library like this although you need to replace your double quotes with single ones or you'll get an error.

If you want to iterate through the key, value pairs of the dictionary you can simply use the .items() method.

import json

my_json = '{"transaction_invoiceno":"11111","fallback":false,"emvTags":"null"}'
my_dict = json.loads(my_json)

for k,v in my_dict.items():
    print(k, v)

transaction_invoiceno 11111
fallback False
emvTags null

score 0 · Answer 2 · answered Apr 16 '21 at 13:13

I believe something like the following snippet should do the trick:

s = '{"transaction_invoiceno":"11111","fallback":false,"emvTags":"null"}'
s = s.replace('false', 'False')
exec('d = '+ s)

transaction_invoiceno = int(d["transaction_invoiceno"])
fallback = d["fallback"]
emvTags = d["emvTags"]

However, the null will be a string.

score 0 · Answer 3 · answered Apr 16 '21 at 13:14

0

One of the best method to resolve this issue is given by User:Johnny John Boy. This is another way check out this code:

my_json = '{"transaction_invoiceno":"11111","fallback":false,"emvTags":"null"}'.replace('false', 'False')
my_dict = eval(my_json)

for k,v in my_dict.items():
    print(k, v)

For more detail you can check out this link

answered Apr 16 '21 at 13:14

Davinder Singh

2,060
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It's interesting, I started with this approach and thought it looked like he was doing API stuff so changed my approach :-) I prefer yours – Johnny John Boy Apr 16 '21 at 13:25

score 0 · Answer 4 · answered Apr 16 '21 at 15:20

import json

data = json.loads('{"transaction_invoiceno":"11111","fallback":false,"emvTags":"null"}') 

#
# Get values by key name
#
transaction_invoiceno = data['transaction_invoiceno']
fallback              = data['fallback']
emvTags               = data['emvTags']

#
# Convert data types ("fallback" already set to bool by json.loads)
#
transaction_invoiceno = int(transaction_invoiceno)
emvTags = (None if data['emvTags'] == "null" else data['emvTags']) 

#
# Check types
#
print f"transaction_invoiceno: type: {type(transaction_invoiceno)}, value: {transaction_invoiceno}")
print(f"fallback: type: {type(fallback)}, value: {fallback}")
print(f"emvTags: type: {type(emvTags)}, value: {emvTags}")

how to convert string to array with values in python

4 Answers4