Python Number()

Python Number

, Number

Number

var1 = 1
var2 = 10

del Number

del

del var1[,var2[,var3[....,varN]]]]

del

del var
del var_a, var_b

Python

(Int) -
(long integers) - L
(floating point real values) - 2.5e2 = 2.5 x 102 = 250
(complex numbers) - a + bj,complex(a,b) ab

int	long	float	complex
10	51924361L	0.0	3.14j
100	-0x19323L	15.20	45.j
-786	0122L	-21.9	9.322e-36j
080	0xDEFABCECBDAECBFBAEl	32.3+e18	.876j
-0490	535633629843L	-90.	-.6545+0J
-0x260	-052318172735L	-32.54e100	3e+26J
0x69	-4721885298529L	70.2-E12	4.53e-7j

"L""L""1"Python"L"
Pythona + bj,complex(a,b) ab

Python Number

int(x [,base ])         x  
long(x [,base ])        x  
float(x )               x  
complex(real [,imag ])    
str(x )                  x   
repr(x )                 x   
eval(str )              Python,  
tuple(s )                s   
list(s )                 s   
chr(x )                   
unichr(x )              Unicode  
ord(x )                   
hex(x )                   
oct(x )

Python math cmath

Python math

Python cmath

cmath math cmath math

math cmath

import math

math :

>>> import math
>>> dir(math)
['__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'ceil', 'copysign', 'cos', 'cosh', 'degrees', 'e', 'erf', 'erfc', 'exp', 'expm1', 'fabs', 'factorial', 'floor', 'fmod', 'frexp', 'fsum', 'gamma', 'gcd', 'hypot', 'inf', 'isclose', 'isfinite', 'isinf', 'isnan', 'ldexp', 'lgamma', 'log', 'log10', 'log1p', 'log2', 'modf', 'nan', 'pi', 'pow', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'tau', 'trunc']
>>>

cmath

>>> import cmath
>>> dir(cmath)
['__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atanh', 'cos', 'cosh', 'e', 'exp', 'inf', 'infj', 'isclose', 'isfinite', 'isinf', 'isnan', 'log', 'log10', 'nan', 'nanj', 'phase', 'pi', 'polar', 'rect', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'tau']
>>>

>>> import cmath
>>> cmath.sqrt(-1)
1j
>>> cmath.sqrt(9)
(3+0j)
>>> cmath.sin(1)
(0.8414709848078965+0j)
>>> cmath.log10(100)
(2+0j)
>>>

Python

	( )
abs(x)	abs(-10) 10
ceil(x)	math.ceil(4.1) 5
cmp(x, y)	x < y -1, x == y 0, x > y 1
exp(x)	ex(ex),math.exp(1) 2.718281828459045
fabs(x)	math.fabs(-10) 10.0
floor(x)	math.floor(4.9) 4
log(x)	math.log(math.e)1.0,math.log(100,10)2.0
log10(x)	10xmath.log10(100) 2.0
max(x1, x2,...)
min(x1, x2,...)
modf(x)	xx
pow(x, y)	x**y
round(x [,n])	xn
sqrt(x)	x

Python


choice(seq)	random.choice(range(10))09
randrange ([start,] stop [,step])	1
random()	[0,1)
seed([x])	seedseedPythonseed
shuffle(lst)
uniform(x, y)	[x,y]

Python


acos(x)	x
asin(x)	x
atan(x)	x
atan2(y, x)	X Y
cos(x)	x
hypot(x, y)	sqrt(xx + yy)
sin(x)	x
tan(x)	x
degrees(x)	,degrees(math.pi/2) 90.0
radians(x)

Python


pi	pi
e	ee

operator.lt(a, b) lt(a, b) a < b operator.le(a, b) le(a,b) a <= b operator.eq(a, b) eq(a,b) a == b operator.ne(a, b) ne(a,b) a != b operator.ge(a, b) gt(a,b) a >= b operator.gt(a, b) ge(a, b) a > b

Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win 32 Type "help", "copyright", "credits" or "license" for more information. >>> ord('b') # convert char to int 98 >>> chr(100) # convert int to char 'd' >>> unichr(100) # return a unicode byte u'd' >>>

>>> abs(-10) 10 >>> fabs(-10) Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'fabs' is not defined >>>import math >>> math.fabs(-10) 10.0 >>>type(abs(-10)) <type 'int'> >>> type(math.fabs(-10)) <type 'float'>

range()

>>> range(1,5)        # 15(5)
[1, 2, 3, 4]
>>> range(1,5,2)      # 152(5)
[1, 3]
>>> range(5)          # 05(5)
[0, 1, 2, 3, 4]

range() 0

>>> for i in range(5) :
...     print(i)
... 
0
1
2
3
4

10 (2017-04-10)

cmp(x, y) python3.x

9 (2017-08-08)

Python ASCII a+1 int('a') , == --- == ord('a') chr(59)

clearlove9 (2017-10-06)

abs() fabs()

1abs()fabs()math
2fabs()floatinteger abs()

abs(-10) 10math.fabs(-10) 10.0

>>>type(abs(-10))
<type 'int'>
>>> type(math.fabs(-10))
<type 'float'>
>>>

xjsnight9 (2017-12-15)

1 %2

>>> binary = lambda n: '' if n==0 else binary(n/2) + str(n%2)
>>> binary(5)
'101'
>>>

2 python bin bin(12345) '0b11000000111001', 0b:

>>> bin(12345).replace('0b','')
'11000000111001'

3 format

>>> "{0:b}".format(12345)
'11000000111001'
>>>

ygl6119 (2018-03-06)