Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "copyright", "credits" or "license()" for more information.
>>> 23
23
>>> 2**9
512
>>> bin(512)
'0b1000000000'
>>> hex(512)
'0x200'
>>> 0b100 + 0b101
9
>>> bin(9)
'0b1001'
>>> s = "123"
>>> int(s)
123
>>> s
'123'
>>> t = "10"
>>> s + t
'12310'
>>> int(s) + int(t)
133
>>> pow(2,9)
512
>>> 2**9
512
>>> import math
>>> math.trun(2.47)
Traceback (most recent call last):
  File "<pyshell#15>", line 1, in <module>
    math.trun(2.47)
AttributeError: module 'math' has no attribute 'trun'
>>> math.trunc(2.47)
2
>>> math.round(2.47,1)
Traceback (most recent call last):
  File "<pyshell#17>", line 1, in <module>
    math.round(2.47,1)
AttributeError: module 'math' has no attribute 'round'
>>> round(2.47, 1)
2.5
>>> round(2.44, 1)
2.4
>>> round(2.45, 1)
2.5
>>> math.ceil(2.47)
3
>>> x = 1
>>> y = 0
>>> x & y
0
>>> x | y
1
>>> x ^ y
1
>>> ~x
-2
>>> ~0b1
-2
>>> x = 0b1101
>>> y = 0b0110
>>> x
13
>>> y
6
>>> x & y
4
>>> bin(4)
'0b100'
>>> a = 0b1110
>>> b = 0b0110
>>> a | b
14
>>> x = 0b11000101
>>> y = 0b00111100
>>> bin(x|y)
'0b11111101'
>>> x
197
>>> bin(x)
'0b11000101'
>>> x >> 1
98
>>> bin(x>>1)
'0b1100010'
>>> bin(x>>4)
'0b1100'
>>> x
197
>>> x//2
98
>>> x>>1
98
>>> x>>2
49
>>> x//4
49
>>> y = 31
>>> bin(y1)
Traceback (most recent call last):
  File "<pyshell#52>", line 1, in <module>
    bin(y1)
NameError: name 'y1' is not defined
>>> bin(y)
'0b11111'
>>> y<<1
62
>>> bin(62)
'0b111110'
>>> y<<18
8126464
>>> bin(y<<18)
'0b11111000000000000000000'
>>> bin(~1)
'-0b10'
>>> 0b11 ^ 0b01
2
>>> bin(2)
'0b10'
>>> 0b1 ^ 0b1
0
>>> 0b1 ^ 0b0
1
>>> a = 0
>>> a ^ 0
0
>>> a ^ 1
1
>>> b = 1
>>> b ^ 0
1
>>> b ^ 1
0
>>> x ^ 1