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def f(obj2, obj3):
"""
>>> f(1.0, 2.95)[0] == f(1.0, 2.95)[1]
True
"""
cdef float flt1, flt2, flt3
flt2, flt3 = obj2, obj3
flt1 = flt2 ** flt3
obj1 = obj2 ** obj3
return flt1, obj1
def g(i):
"""
>>> g(4)
1024
"""
return i ** 5
def h(i):
"""
>>> h(4)
625
"""
return 5 ** i
def constant_py():
"""
>>> constant_py() == 2 ** 10
True
"""
result = (<object>2) ** 10
return result
def constant_long():
"""
>>> constant_long() == 2 ** 36
True
"""
result = (<object>2L) ** 36
return result
def small_int_pow(long s):
"""
>>> small_int_pow(3)
(1, 3, 9, 27, 81)
>>> small_int_pow(-5)
(1, -5, 25, -125, 625)
"""
return s**0, s**1, s**2, s**3, s**4
def int_pow(short a, short b):
"""
>>> int_pow(7, 2)
49
>>> int_pow(5, 3)
125
>>> int_pow(2, 10)
1024
"""
return a**b
class I(int):
"""
Copied from CPython's test_descr.py
>>> I(2) ** I(3)
I(8)
>>> 2 ** I(3)
I(8)
>>> I(3).pow2()
I(8)
"""
def __repr__(self):
return 'I(%s)' % int(self)
def __pow__(self, other, mod=None):
if mod is None:
return I(pow(int(self), int(other)))
else:
return I(pow(int(self), int(other), int(mod)))
def __rpow__(self, other, mod=None):
if mod is None:
return I(pow(int(other), int(self), mod))
else:
return I(pow(int(other), int(self), int(mod)))
def pow2(self):
return 2 ** self
def optimised_pow2(n):
"""
>>> optimised_pow2(0)
1
>>> optimised_pow2(1)
2
>>> optimised_pow2(10)
1024
>>> optimised_pow2(30)
1073741824
>>> print(repr(optimised_pow2(31)).rstrip('L'))
2147483648
>>> print(repr(optimised_pow2(32)).rstrip('L'))
4294967296
>>> print(repr(optimised_pow2(60)).rstrip('L'))
1152921504606846976
>>> print(repr(optimised_pow2(63)).rstrip('L'))
9223372036854775808
>>> print(repr(optimised_pow2(64)).rstrip('L'))
18446744073709551616
>>> print(repr(optimised_pow2(100)).rstrip('L'))
1267650600228229401496703205376
>>> optimised_pow2(30000) == 2 ** 30000
True
>>> optimised_pow2(-1)
0.5
>>> optimised_pow2(0.5) == 2 ** 0.5
True
>>> optimised_pow2('test')
Traceback (most recent call last):
TypeError: unsupported operand type(s) for ** or pow(): 'int' and 'str'
"""
if isinstance(n, (int, long)) and 0 <= n < 1000:
assert isinstance(2.0 ** n, float), 'float %s' % n
assert isinstance(2 ** n, (int, long)), 'int %s' % n
return 2 ** n
def optimised_pow2_inplace(n):
"""
>>> optimised_pow2_inplace(0)
1
>>> optimised_pow2_inplace(1)
2
>>> optimised_pow2_inplace(10)
1024
>>> optimised_pow2_inplace(30)
1073741824
>>> print(repr(optimised_pow2_inplace(32)).rstrip('L'))
4294967296
>>> print(repr(optimised_pow2_inplace(100)).rstrip('L'))
1267650600228229401496703205376
>>> optimised_pow2_inplace(30000) == 2 ** 30000
True
>>> optimised_pow2_inplace(-1)
0.5
>>> optimised_pow2_inplace(0.5) == 2 ** 0.5
True
>>> optimised_pow2_inplace('test') #doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: unsupported operand type(s) for ...: 'int' and 'str'
"""
x = 2
x **= n
return x
|
