PyFile:FStringExpressionContainBraces.py
  PyAssignmentStatement
    PyTargetExpression: s
      PsiElement(Py:IDENTIFIER)('s')
    PsiWhiteSpace(' ')
    PsiElement(Py:EQ)('=')
    PsiWhiteSpace(' ')
    PyStringLiteralExpression: { {1, 2} }
      PyFormattedStringElement
        PsiElement(Py:FSTRING_START)('f'')
        PyFStringFragment
          PsiElement(Py:FSTRING_FRAGMENT_START)('{')
          PsiWhiteSpace(' ')
          PySetLiteralExpression
            PsiElement(Py:LBRACE)('{')
            PyNumericLiteralExpression
              PsiElement(Py:INTEGER_LITERAL)('1')
            PsiElement(Py:COMMA)(',')
            PsiWhiteSpace(' ')
            PyNumericLiteralExpression
              PsiElement(Py:INTEGER_LITERAL)('2')
            PsiElement(Py:RBRACE)('}')
          PsiWhiteSpace(' ')
          PsiElement(Py:FSTRING_FRAGMENT_END)('}')
        PsiElement(Py:FSTRING_END)(''')