Lists of inconsistent types

[Elara6331]

Describe the bug
When using a list of different types, it is implemented as []interface{} as it should, but getting a value does not assert it to the proper type

Python code example

def main():
	x = ["x", 1, 2, 3.0]
	x.append(True)
	print(x[1]+x[2])

if __name__ == '__main__':
  main()

Current behavior

package main

import "fmt"

func main() {
	x := []interface{}{"x", 1, 2, 3.0}
	x = append(x, true)
	fmt.Println(x[1] + x[2])
}

This creates an error because interfaces cannot be added.

Expected behavior
I expected that there would be a type assertion converting the values to int so they could be added

Go code example

package main

import "fmt"

func main() {
	x := []interface{}{"x", 1, 2, 3.0}
	x = append(x, true)
	fmt.Println(x[1].(int) + x[2].(int))
}