Format string dict in dict

Question

I want to have define a payload with variables, and the payload contains a dict inside a dict, like so:

payload = {"columns": "{x,y,z}",
           "number": "{n:123456}"}

I wanted ideally something like for a variable:

myVar = 123

payload = {"columns": "{x,y,z}",
           "number": "{n:{myVar}}"}

However this and other combinations doesn't work. I've tried both f-strings and formats. What is the best approach for this?

Answer 1

You can do:

myVar = 123

payload = {"columns": "{x,y,z}", "number": f"{{n:{myVar}}}"}
print(payload)

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Or:

payload = {"columns": "{x,y,z}", "number": "{n:" + str(myVar) + "}"}
print(payload)

---

Or:

payload = {"columns": "{x,y,z}", "number": "{{n:{}}}".format(myVar)}
print(payload)

All prints:

{'columns': '{x,y,z}', 'number': '{n:123}'}