cpython/Lib/test/test_augassign.py

# Augmented assignment test.

x = 2
x += 1
x *= 2
x **= 2
x -= 8
x /= 2
x %= 12
x &= 2
x |= 5
x ^= 1

print x

x = [2]
x[0] += 1
x[0] *= 2
x[0] **= 2
x[0] -= 8
x[0] /= 2
x[0] %= 12
x[0] &= 2
x[0] |= 5
x[0] ^= 1

print x

x = {0: 2}
x[0] += 1
x[0] *= 2
x[0] **= 2
x[0] -= 8
x[0] /= 2
x[0] %= 12
x[0] &= 2
x[0] |= 5
x[0] ^= 1

print x[0]

x = [1,2]
x += [3,4]
x *= 2

print x

x = [1, 2, 3]
y = x
x[1:2] *= 2
y[1:2] += [1]

print x
print x is y

class aug_test:
	def __init__(self, value):
		self.val = value
	def __radd__(self, val):
		return self.val + val
	def __add__(self, val):
		return aug_test(self.val + val)


class aug_test2(aug_test):
	def __iadd__(self, val):
		self.val = self.val + val
		return self

class aug_test3(aug_test):
	def __iadd__(self, val):
		return aug_test3(self.val + val)

x = aug_test(1)
y = x
x += 10

print isinstance(x, aug_test)
print y is not x 
print x.val

x = aug_test2(2)
y = x
x += 10

print y is x
print x.val

x = aug_test3(3)
y = x
x += 10

print isinstance(x, aug_test3)
print y is not x
print x.val

class testall:

	def __add__(self, val):
		print "__add__ called"
	def __radd__(self, val):
		print "__radd__ called"
	def __iadd__(self, val):
		print "__iadd__ called"
		return self

	def __sub__(self, val):
		print "__sub__ called"
	def __rsub__(self, val):
		print "__rsub__ called"
	def __isub__(self, val):
		print "__isub__ called"
		return self

	def __mul__(self, val):
		print "__mul__ called"
	def __rmul__(self, val):
		print "__rmul__ called"
	def __imul__(self, val):
		print "__imul__ called"
		return self

	def __div__(self, val):
		print "__div__ called"
	def __rdiv__(self, val):
		print "__rdiv__ called"
	def __idiv__(self, val):
		print "__idiv__ called"
		return self

	def __mod__(self, val):
		print "__mod__ called"
	def __rmod__(self, val):
		print "__rmod__ called"
	def __imod__(self, val):
		print "__imod__ called"
		return self

	def __pow__(self, val):
		print "__pow__ called"
	def __rpow__(self, val):
		print "__rpow__ called"
	def __ipow__(self, val):
		print "__ipow__ called"
		return self

	def __or__(self, val):
		print "__or__ called"
	def __ror__(self, val):
		print "__ror__ called"
	def __ior__(self, val):
		print "__ior__ called"
		return self

	def __and__(self, val):
		print "__and__ called"
	def __rand__(self, val):
		print "__rand__ called"
	def __iand__(self, val):
		print "__iand__ called"
		return self

	def __xor__(self, val):
		print "__xor__ called"
	def __rxor__(self, val):
		print "__rxor__ called"
	def __ixor__(self, val):
		print "__ixor__ called"
		return self

	def __rshift__(self, val):
		print "__rshift__ called"
	def __rrshift__(self, val):
		print "__rrshift__ called"
	def __irshift__(self, val):
		print "__irshift__ called"
		return self

	def __lshift__(self, val):
		print "__lshift__ called"
	def __rlshift__(self, val):
		print "__rlshift__ called"
	def __ilshift__(self, val):
		print "__ilshift__ called"
		return self

x = testall()
x + 1
1 + x
x += 1

x - 1
1 - x
x -= 1

x * 1
1 * x
x *= 1

x / 1
1 / x
x /= 1

x % 1
1 % x
x %= 1

x ** 1
1 ** x
x **= 1

x | 1
1 | x
x |= 1

x & 1
1 & x
x &= 1

x ^ 1
1 ^ x
x ^= 1

x >> 1
1 >> x
x >>= 1

x << 1
1 << x
x <<= 1