StringForm with named arguments
In python, this is possible:
example:
a = "{x}, {y}".format(x=5, y=12)
print(a)
result:
5, 12
In Mathematica, I used
StringForm ["``,``",5,12]
but I couldn't use named arguments.
Is there any way to do this in Mathematica? like a :
StringForm ["`x`,`y`",x->5, y->12]
sfWithNamedArguments = TemplateApply[#, Association[MapAt[SymbolName,{##2}, {All, 1}]]]&;
sfWithNamedArguments["`q`,`r`", q -> 10, r -> 5]
"10,5"
The following also works in version 9 (where TemplateApply is not available):
ClearAll[sF]
sF = StringReplace[#, "`" ~~ a_ ~~ "`" :> IntegerString[ToExpression[a] /. {##2}]] &;
sF["`x` then `y` then `x` again", x -> 5, y -> 12]
"5 then 12 then 5 again"
Mathematica and python don't have much in common in the area you are asking about. You might consider
Row[{x, ", ", y}] /. {x -> 5, y -> 12}
which displays as
but is not a string.
% // FullForm
FullForm[Row[{5, ", ", 12}]]
If you need a string rather than a display form, use
(Row[{x, ", ", y}] /. {x -> 5, y -> 12}) // ToString
I think the idiomatic way to write "{x}, {y}".format(x=5, y=12) in Wolfram Language would be
In[72]:= StringTemplate["`x`,`y`"][<|"x" -> 5, "y" -> 12|>]
Out[72]= "5,12"
edit: I posted this because I didn't see StringTemplate in either of the answers, but looking now I see it was in a comment-as-answer. I will leave it up nonetheless.
StringTemplate[" `x` , `y`"][<|"x" -> 1, "y" -> 2|>]orTemplateApply["`a`,`b`", <|"a" -> 1, "b" -> 2|>]? $\endgroup$