Things from Python I'd miss in Go(yosefk.com)

    Matrix a = zeroMatrix(4,4);
    Matrix b = identityMatrix(4,4);
    Matrix c = a+b;

    Matrix c= a.add(b);

    if err != nil {
        return (whatever null type), err
    }

    if config, err := readConfig(ioReader); err != nil {
      switch err.(type) {
      case io.ErrClosedPipe:
        // do one thing
      case ParseError:
        // do something else
      case ...
      }
    }

    def f(a, b=1, c=2):
        pass

  func() { 
    defer func() { 
      r = recover()
      if e, ok := r.(SomeException); ok {
        handle_exception()
      } else {
        panic(e)
      }
    }
    dosomething() 
  }()