Transform an array into a single value inside a dictionary using Python

Question

I have this dictionary in python:

example = {
    "foo": ["1"],
    "bar": ["1","2"]
}

How can i transform efficiently and using Python the variable example to:

example = {
    "foo": "1",
    "bar": ["1","2"]
}

?

What are you *really* trying to do? You can handle this when reading the dict. — Tatsuyuki Ishi, Mar 11 '17 at 05:11
I read the data from a url and I get a dictionary with that format. I need to transform such dictionary into JSON and see if other JSON field in postgres have included that data. *I am using django — Adrian Martinez, Mar 11 '17 at 05:16

score 0 · Accepted Answer · answered Mar 11 '17 at 05:24

0

Assuming the dict is not nesting, you can iterate over the dict to modify it: (Python 3, see here for difference)

for key, value in example.items():
  if isinstance(value, list) and len(value) == 1:
    example[key] = value[0]

answered Mar 11 '17 at 05:24

Tatsuyuki Ishi

This is not slow, but as this is Python it's not as fast as C. – Tatsuyuki Ishi Mar 11 '17 at 05:30
I was asking just in case there where a more efficient method, for example, a module already built in C – Adrian Martinez Mar 11 '17 at 05:31
No, you probably need to make it by hand, if you like a C extension. – Tatsuyuki Ishi Mar 11 '17 at 05:31

1 Answers1