==================
arithmetic operators
==================

a = 1 + 2 - 3 * 4 / 5 % 6
b = 7 // 8
c = 2 ** 10

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (binary_operator
        left: (number)
        right: (number))
      right: (binary_operator
        left: (binary_operator
          left: (binary_operator
            left: (number)
            right: (number))
          right: (number))
        right: (number))))
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (number)
      right: (number)))
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (number)
      right: (number))))

==================
boolean operators
==================

x = a and b or not c

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (boolean_operator
      left: (boolean_operator
        left: (identifier)
        right: (identifier))
      right: (not_operator
        argument: (identifier)))))

==================
comparison chaining
==================

r = 3 < 5 < 7

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (comparison_operator
      (number)
      (comparison_operator
        (number)
        (number)))))

==================
is and is not
==================

a = x is None
b = y is not None

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (comparison_operator
      (identifier)
      (none)))
  (assignment
    left: (pattern
      (identifier))
    right: (comparison_operator
      (identifier)
      (not_operator
        argument: (none)))))

==================
in and not in
==================

a = x in items
b = y not in items

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (comparison_operator
      (identifier)
      (identifier)))
  (assignment
    left: (pattern
      (identifier))
    right: (comparison_operator
      (identifier)
      (identifier))))

==================
bitwise operators
==================

a = x & y | z ^ w
b = ~a
c = x << 2 >> 1

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (binary_operator
        left: (identifier)
        right: (identifier))
      right: (binary_operator
        left: (identifier)
        right: (identifier))))
  (assignment
    left: (pattern
      (identifier))
    right: (unary_operator
      argument: (identifier)))
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (binary_operator
        left: (identifier)
        right: (number))
      right: (number))))

==================
unary operators
==================

a = -x
b = not w

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (unary_operator
      argument: (identifier)))
  (assignment
    left: (pattern
      (identifier))
    right: (not_operator
      argument: (identifier))))

==================
augmented assignment
==================

a += 1
b //= 4
c **= 5

---

(module
  (augmented_assignment
    left: (pattern
      (identifier))
    right: (number))
  (augmented_assignment
    left: (pattern
      (identifier))
    right: (number))
  (augmented_assignment
    left: (pattern
      (identifier))
    right: (number)))

==================
assignment as expression
==================

node = a[i -= 1]
r = (x += 1)

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (subscript
      object: (identifier)
      subscript: (augmented_assignment
        left: (pattern
          (identifier))
        right: (number))))
  (assignment
    left: (pattern
      (identifier))
    right: (parenthesized_expression
      (augmented_assignment
        left: (pattern
          (identifier))
        right: (number)))))

==================
ternary conditional
==================

a = 1 if cond else 2

---

(module
  (conditional_expression
    (assignment
      left: (pattern
        (identifier))
      right: (number))
    (identifier)
    (number)))

==================
power right associative
==================

a = 2 ** 3 ** 4

---

(module
  (assignment
    left: (pattern
      (identifier))
    right: (binary_operator
      left: (number)
      right: (binary_operator
        left: (number)
        right: (number)))))

==================
tuple packing and unpacking
==================

a, b = b, a
x, y, z = fun()

---

(module
  (assignment
    left: (pattern_list
      (pattern
        (identifier))
      (pattern
        (identifier)))
    right: (expression_list
      (identifier)
      (identifier)))
  (assignment
    left: (pattern_list
      (pattern
        (identifier))
      (pattern
        (identifier))
      (pattern
        (identifier)))
    right: (call
      function: (identifier)
      arguments: (argument_list))))