String Formatting a stringified dictionary using .format()

Question

value  = '{"a" : 0, "b": 6, "c" : {REPLACE}}'
replace = {'REPLACE' : "Replace String"}

value.format(**replace)
value.format(replace)

is giving me error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: '"a"'

score 0 · Answer 1 · answered Dec 14 '19 at 07:48

0

Unfortunately { braces are part of the formatting language to escape them you need to double them {{, so:

In []:
value  = '{{"a" : 0, "b": 6, "c" : {REPLACE}}}'
replace = {'REPLACE' : "Replace String"}

value.format(**replace)

Out[]:
'{"a" : 0, "b": 6, "c" : Replace String}'

answered Dec 14 '19 at 07:48

AChampion

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in this case, it works if I escape it, How do i go about it if I am trying to replace a bunch of strings in HTML/JS files? – Karthik Prabhu Dec 14 '19 at 07:53
Why not just use `str.replace()` - `value.replace('REPLACE', "'Replace String'")`? – AChampion Dec 14 '19 at 07:55
My use case is more restrictive - I am trying to generalise a function which will replace different set of 'strings' in different files using key: values generated dynamically. – Karthik Prabhu Dec 14 '19 at 07:58
You may want to ask a specific question on what you are trying to do. – AChampion Dec 14 '19 at 08:00

score 0 · Answer 2 · answered Dec 14 '19 at 07:52

0

You have to escape the {} with another {}. Here is an example:

'{{"a" : 0, "b": 6, "c" : "{}"}}'.format("Replace String")

Refer this for detailed explanation.

answered Dec 14 '19 at 07:52

Kaushal28

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String Formatting a stringified dictionary using .format()

2 Answers2