---input---
f"{math.pi=!f:.2f}"

---tokens---
'f'           Literal.String.Affix
'"'           Literal.String.Double
'{'           Literal.String.Interpol
'math'        Name
'.'           Operator
'pi'          Name
'=!f:'        Literal.String.Interpol
'.2f'         Literal.String.Double
'}'           Literal.String.Interpol
'"'           Literal.String.Double
'\n'          Text
