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  • # [Scala 3](https://docs.scala-lang.org/scala3/) and [Python 3.8 (pre-release)], 385 bytes
  • <!-- language-all: lang-python -->
  • def String():Any=0
  • def Int():Any=0
  • def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))
  • class M:
  • f("""def String():Any=0
  • def Int():Any=0
  • def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))
  • class M:
  • f(Q)
  • def main(a:M):M=a
  • def chr(a:Int):String=""+a.toChar
  • @main
  • def q():M=M()""")
  • def main(a:M):M=a
  • def chr(a:Int):String=""+a.toChar
  • @main
  • def q():M=M()
  • [Try it online in Scala!](https://scastie.scala-lang.org/UTPHA7eVRDmuWj7oIeSmpw)
  • [Try it online in Python!][TIO-kqmo663r]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-kqmo663r]: https://tio.run/##xU89C8IwEN3zK0qmOytFqUMJBBQnhwziLzhqawttGpMs/fUxaUVwF5zu3eN98Mzsu0mXlbEh3Js2u3nb6wegOOlZ7liiLtp//S04scpW1kTowRW2MQPVDdSdhWqP23TLA27K3OUfjMjqgZzLlGBZjOKc/6P2ikvmSL0GEgqFkrQwyUEiduO7THKeU@Gnc0eWHZNh0T0heRRgHPCzrBBe "Python 3.8 (pre-release) – Try It Online"
  • `def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))`
  • `f` is where everything happens. In Scala, the `print` method doesn't add a newline, but that doesn't matter to us. Both Scala and Python have a `replace` method on strings and can multiply strings by numbers, but they have different ways of turning integers into strings, which is why the `chr` method is defined later for Scala's benefit. It's already present in Python, but the interpreter sees it after `f`, and it's never run anyway. `s` is a string literal which contains basically the entire program, but the definition of `s` is replaced with `Q`. In `f`, this `Q` is replaced with `"""<contents of s>"""` to mirror the definition of `s`, and that gets printed.
  • While Python can have expressions outside functions and classes, Scala needs a main method. Thus, the call to `f` is put inside a `class M`. Python runs this when the class loads, while Scala calls it in the method `q`, when the constructor is called using `M()`. However, to make the `@main` annotation to work with Python, a function named `main` was made.
  • `chr` is already defined in Python, and to make it work in Scala, the `chr` method converts an integer to a string based on its ASCII value.
  • `Int` and `String` are Scala builtins that we need to annotate the parameters to `f` and `chr` with, but Python doesn't know about them, which is why `def String()` and `def Int()` are defined. I made them functions instead of plain variables because Scala requires variables to be declared with `val` and `var`, something that is not possible in Python. While Scala sees `def String` as a method that takes nothing and can output `Any` value (specifically, `0`), Python sees it as setting the value of a variable `Any` to `0`. Neither of these two have any real impact on the code other than making it work nicely with Python.
  • # [Scala 3](https://docs.scala-lang.org/scala3/) and [Python 3.8 (pre-release)], 2 languages (385 bytes)
  • <!-- language-all: lang-python -->
  • def String():Any=0
  • def Int():Any=0
  • def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))
  • class M:
  • f("""def String():Any=0
  • def Int():Any=0
  • def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))
  • class M:
  • f(Q)
  • def main(a:M):M=a
  • def chr(a:Int):String=""+a.toChar
  • @main
  • def q():M=M()""")
  • def main(a:M):M=a
  • def chr(a:Int):String=""+a.toChar
  • @main
  • def q():M=M()
  • [Try it online in Scala!](https://scastie.scala-lang.org/UTPHA7eVRDmuWj7oIeSmpw)
  • [Try it online in Python!][TIO-kqmo663r]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-kqmo663r]: https://tio.run/##xU89C8IwEN3zK0qmOytFqUMJBBQnhwziLzhqawttGpMs/fUxaUVwF5zu3eN98Mzsu0mXlbEh3Js2u3nb6wegOOlZ7liiLtp//S04scpW1kTowRW2MQPVDdSdhWqP23TLA27K3OUfjMjqgZzLlGBZjOKc/6P2ikvmSL0GEgqFkrQwyUEiduO7THKeU@Gnc0eWHZNh0T0heRRgHPCzrBBe "Python 3.8 (pre-release) – Try It Online"
  • `def f(s:String):Any=print(s.replace(chr(81),chr(34)*3+s+chr(34)*3))`
  • `f` is where everything happens. In Scala, the `print` method doesn't add a newline, but that doesn't matter to us. Both Scala and Python have a `replace` method on strings and can multiply strings by numbers, but they have different ways of turning integers into strings, which is why the `chr` method is defined later for Scala's benefit. It's already present in Python, but the interpreter sees it after `f`, and it's never run anyway. `s` is a string literal which contains basically the entire program, but the definition of `s` is replaced with `Q`. In `f`, this `Q` is replaced with `"""<contents of s>"""` to mirror the definition of `s`, and that gets printed.
  • While Python can have expressions outside functions and classes, Scala needs a main method. Thus, the call to `f` is put inside a `class M`. Python runs this when the class loads, while Scala calls it in the method `q`, when the constructor is called using `M()`. However, to make the `@main` annotation to work with Python, a function named `main` was made.
  • `chr` is already defined in Python, and to make it work in Scala, the `chr` method converts an integer to a string based on its ASCII value.
  • `Int` and `String` are Scala builtins that we need to annotate the parameters to `f` and `chr` with, but Python doesn't know about them, which is why `def String()` and `def Int()` are defined. I made them functions instead of plain variables because Scala requires variables to be declared with `val` and `var`, something that is not possible in Python. While Scala sees `def String` as a method that takes nothing and can output `Any` value (specifically, `0`), Python sees it as setting the value of a variable `Any` to `0`. Neither of these two have any real impact on the code other than making it work nicely with Python.

Suggested over 2 years ago by General Sebast1an‭