Dictionary declaration in python

Question

I have declared a dictionary

data=dict(key="sadasfd",secret="1213",to="23232112",text="sucess",from='nattu')

It is showing error in python, saying that keyword is used. Why does it is not taking from?

Whenever I encounter with from as a key in dictionary, I can't use it.

@Nattu The code that you've posted actually works, there's a difference between `From` and `from`. — Ashwini Chaudhary, Apr 23 '14 at 12:27
why inside dict it accepting keywords.. so v cant use Dict if v have key as From.. — , Apr 23 '14 at 12:27
@Aशwiniचhaudhary ur right .. please make it as answer... — , Apr 23 '14 at 12:28
@Nattu: Because Python *syntax* supports keyword arguments, why **not** have `dict()` accept keyword arguments? That functionality is handy sometimes, but is limited by only allowing valid *identifiers* as keys. That means no integers either, for example. — Martijn Pieters, Apr 23 '14 at 12:46
See my comments on the other answer for an explanation and examples of what `dict()` should be used for. — Erik Kaplun, Apr 23 '14 at 12:57

Martijn Pieters · Accepted Answer · 2014-04-23T12:50:10.320

from is a reserved keyword and cannot be used as a keyword argument to the dict() constructor.

Use a {...} dictionary literal instead:

data = {'key': "sadasfd", 'secret': "1213", 
        'to': "23232112", 'text': "sucess", 'from': 'nattu'}

or assign to the key afterwards:

data['from'] = 'nattu'

or avoid using reserved keywords altogether.

Python supports passing arbitrary keywords to a callable, and uses dictionaries to capture such arguments, so it is a logical extension that the dict() constructor accepts keyword arguments. But such arguments are limited to valid Python identifiers only. If you want to use anything else (reserved keywords, strings starting with integers or containing spaces, integers, floats, tuples, etc.), stick to the Python dict literal syntax instead.

Dictionary declaration in python

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