資料型別
描述bool_
boolean (true or false) stored as a byte
int_
default integer type (same as c long normally either int64 or int32)
intc
identical to c int (normally int32 or int64)
intp
integer used for indexing (same as c ssize_tnormally either int32 or int64)
int8
byte (-128 to 127)
int16
integer (-32768 to 32767)
int32
integer (-2147483648 to 2147483647)
int64
integer (-9223372036854775808 to 9223372036854775807)
uint8
unsigned integer (0 to 255)
uint16
unsigned integer (0 to 65535)
uint32
unsigned integer (0 to 4294967295)
uint64
unsigned integer (0 to 18446744073709551615)
float_
shorthand for float64.
float16
half precision float: sign bit, 5 bits exponent, 10 bits mantissa
float32
single precision float: sign bit, 8 bits exponent, 23 bits mantissa
float64
double precision float: sign bit, 11 bits exponent, 52 bits mantissa
complex_
shorthand for complex128.
complex64
complex number, represented by two 32-bit floats (real and imaginary components)
complex128
complex number, represented by two 64-bit floats (real and imaginary components)
單精度8位階碼，1位符號，剩下23位尾數，算出2的負23次方，得到0.00000011920928955078125
前面0有多少個，就表示能精確到那一位
雙精度11位階碼，1位符號，剩下52位尾數，算出2的負52次方，得到0.00000000000000022204460492503130808472633361816
前面0有多少個，就表示能精確到那一位
參考文獻
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