How to format a Python string to resemble a dictionary using .format()?

Question

I have a python variable containing the string A and another one containing the string B.

I want to generate the string which represents the dictionary containing the aforementioned two strings as a key value pair. How can I do it? Using nested curly brackets inside a string literal seems not to work. But I need that notation to use .format()

>>> x = "A"
>>> y = "B"
>>> assert(eval('\{"{}": "{}"\}'.format(x, y)) == str({x: y}))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: '"{}"

Weird question. What's wrong with `repr({x:y})`? – wim Jun 04 '19 at 04:30 — wim, Jun 04 '19 at 04:30
Escape with double braces `{{"{}": "{}"}}` – Smart Manoj Jun 04 '19 at 04:33 — Smart Manoj, Jun 04 '19 at 04:33

score 1 · Accepted Answer · answered Jun 04 '19 at 04:38

1

You can escape curly braces by adding double curly braces i.e {{ and }}.

To generate the string:

>>> x = 'A'
>>> y = 'B'
>>> dict_str = "{{'{}': '{}'}}".format(x,y)
>>> dict_str
"{'A': 'B'}"

answered Jun 04 '19 at 04:38

Vishnu Dasu

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How to format a Python string to resemble a dictionary using .format()?

1 Answers1