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builtin.py
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# builtin 函数
## abs
assert abs(10) == 10
assert abs(0) == 0
assert abs(-10) == 10
assert abs(1.07) == 1.07
assert abs(-0.52) == 0.52
## all
assert all([]) == True
assert all([1, 2]) == True
assert all([0, 1, 2]) == False
assert all([0, 0]) == False
## any
assert any([]) == False
assert any([1, 2]) == True
assert any([0, 1, 2]) == True
assert any([0, 0]) == False
## ascii
## bin
assert bin(0) == '0b0'
assert bin(10) == '0b1010'
assert bin(100) == '0b1100100'
assert bin(1000) == '0b1111101000'
## bool
assert bool(True)
assert bool(1)
assert bool('abc')
assert bool([1, 2])
assert not bool(False)
assert not bool([])
assert not bool('')
assert not bool(0)
## bytearray
## bytes
## callable
assert callable(abs)
assert callable(lambda x: x)
assert not callable(0)
assert not callable('abc')
assert not callable([])
## chr
## classmethod
## compile
## complex
## delattr
## dict
d = dict()
assert len(d) == 0
d[1] = 'a'
d[2] = 'b'
e = dict(d)
assert e[1] == 'a'
assert e[2] == 'b'
### todo,因为函数不支持键值
# dict(one=1, two=2)
## dir
## divmod
d, m = divmod(10, 3)
assert d == 3 and m == 1
d, m = divmod(-10, 3)
assert d == -4 and m == 2
d, m = divmod(10, -3)
assert d == -4 and m == -2
d, m = divmod(-10, -3)
assert d == 3 and m == -1
## enumerate
l = [0, 1, 2, 3, 4]
for i, n in enumerate(l):
assert i == n
### todo: 如果应用于 dict,则只针对 keys() 值进行遍历
# d = { 'a': 1, 'b': 'z' }
# for i, k in enumerate(d):
## eval
## exec
## filter
l = [0, 1, 2, 3, 4, 5]
f = list(filter(None, l))
assert len(f) == 5
assert f[0] == 1
assert f[4] == 5
f = list(filter(lambda n: n%2 == 0, l))
assert len(f) == 3
assert f[0] == 0
assert f[1] == 2
assert f[2] == 4
d = { 0: 'a', 'x': 'y', '': 'space' }
f = list(filter(None, d))
assert len(f) == 1
assert f[0] == 'x'
## float
assert float(10) == 10.0
assert float(10.4) == 10.4
assert float('12') == 12.0
assert float('10.8') == 10.8
## format
## frozenset
## getattr
## globals
## hasattr
## hash
## help
## hex
assert hex(0) == '0x0'
assert hex(10) == '0xa'
assert hex(100) == '0x64'
assert hex(1000) == '0x3e8'
assert hex(10000) == '0x2710'
assert hex(100000) == '0x186a0'
## id
## input
## int
assert int() == 0
assert int(10) == 10
assert int(10.5) == 10
assert int(-10.5) == -10
assert int('10', 10) == 10
assert int('10', 16) == 16
assert int(' 10', 10) == 10
assert int('10 ', 16) == 16
assert int('0b10', 0) == 2
assert int('0x10', 0) == 16
assert int('-0b10', 0) == -2
assert int('-0x10', 0) == -16
## isinstance
## issubclass
## iter
## len
assert len('') == 0
assert len('abcd') == 4
assert len([]) == 0
assert len([1, 2, 3]) == 3
assert len({}) == 0
assert len({ 0: 0, 'a': 'z' }) == 2
## list
assert len(list()) == 0
l = list([1, 2, 3])
assert len(l) == 3
assert l[0] == 1
assert l[1] == 2
assert l[2] == 3
### not support tuple expr
#l = list((1, 2, 3))
#assert len(l) == 3
#assert l[0] == 1
#assert l[1] == 2
#assert l[2] == 3
## locals
### not support
## map
l = [ 0, 1, 2, 3, 4 ]
m = list(map(lambda x: x**2, l))
assert len(m) == 5
assert m[0] == 0
assert m[1] == 1
assert m[2] == 4
assert m[3] == 9
assert m[4] == 16
n = list(map(lambda x, y: x+y, l, m))
assert len(n) == 5
assert n[0] == 0
assert n[1] == 2
assert n[2] == 6
assert n[3] == 12
assert n[4] == 20
## max
l = [1, 2, 3, 4, 5]
assert max(l) == 5
assert max(1, 2, 3, 4, 5) == 5
## memoryview
## min
l = [1, 2, 3, 4, 5]
assert min(l) == 1
assert min(1, 2, 3, 4, 5) == 1
## next
## object
## oct
assert oct(0) == '0o0'
assert oct(10) == '0o12'
assert oct(100) == '0o144'
assert oct(1000) == '0o1750'
assert oct(10000) == '0o23420'
## open
## ord
## pow
assert pow(2, 10) == 1024
assert pow(2, 9, 3) == 2
## print, can't tested by assert
'''
a = 10
b = 20
c = 'message'
print()
print(a)
print(a, b)
print(a, b, c)
'''
## property
## range
l = [i for i in range(10)]
assert len(l) == 10
assert l[0] == 0
assert l[9] == 9
l = [i for i in range(1, 5)]
assert len(l) == 4
assert l[0] == 1
assert l[1] == 2
assert l[2] == 3
assert l[3] == 4
l = [i for i in range(1, 9, 2)]
assert len(l) == 4
assert l[0] == 1
assert l[1] == 3
assert l[2] == 5
assert l[3] == 7
## reduce
#from functools import reduce
#l = [0, 1, 2, 3, 4, 5]
#assert reduce(lambda x, y: x+y, [], 10) == 10
#assert reduce(lambda x, y: x+y, l) == 15
#assert reduce(lambda x, y: x+y, l, 10) == 25
## repr
## reversed
l = [3, 1, 4, 1, 5, 9]
rl = list(reversed(l))
assert rl[0] == 9
assert rl[1] == 5
assert rl[2] == 1
assert rl[3] == 4
assert rl[4] == 1
assert rl[5] == 3
## round
assert round(10) == 10
assert round(10, 0) == 10
assert round(10, 1) == 10
assert round(10, 2) == 10
assert round(10, -1) == 10
assert round(10, -2) == 0
assert round(10.49, 0) == 10
assert round(10.51, 0) == 11
assert round(10.49, 1) == 10.5
assert round(10.51, 1) == 10.5
### TODO: in python, that's wired
#assert round(10.5) == 10
#assert round(9.5) == 10
## set
## setattr
## slice
s = slice(4)
assert s.start == None
assert s.stop == 4
assert s.step == None
s = slice(1, 3)
assert s.start == 1
assert s.stop == 3
assert s.step == None
s = slice(1, 5, 2)
assert s.start == 1
assert s.stop == 5
assert s.step == 2
## sorted
l = [0, 3, -2, 5, 6, 9]
sl = sorted(l)
assert len(sl) == 6
assert sl[0] == -2
assert sl[1] == 0
assert sl[2] == 3
assert sl[3] == 5
assert sl[4] == 6
assert sl[5] == 9
# FIXME: 因为无法接收键值参数,所以 key reverse 暂时无法使用
#sl = sorted(l, None, True)
#
#assert len(sl) == 6
#assert sl[5] == -2
#assert sl[4] == 0
#assert sl[3] == 3
#assert sl[2] == 5
#assert sl[1] == 6
#assert sl[0] == 9
## staticmethod
## str
## sum
assert sum([1, 2, 3]) == 6
assert sum([]) == 0
assert sum([1, 2, 3], 0) == 6
assert sum([1, 2, 3], 4) == 10
## super
## tuple
t = tuple()
assert len(t) == 0
t = tuple([1, 2, 3, 4])
assert t[0] == 1
assert t[1] == 2
assert t[2] == 3
assert t[3] == 4
## type
## vars
## zip
l1 = [ 0, 1, 2, 3, 4, 5 ]
l2 = [ 'a', 'b', 'c' ]
l3 = [ 3, '.', 1, 4, 1 ]
z = list(zip(l1, l2, l3))
assert z[0][0] == 0
assert z[0][1] == 'a'
assert z[0][2] == 3
assert z[1][0] == 1
assert z[1][1] == 'b'
assert z[1][2] == '.'
assert z[2][0] == 2
assert z[2][1] == 'c'
assert z[2][2] == 1
## __import__