25、'float',?用于將整數和字符串轉換成浮點數。

class float(object)| float(x) -> floating point number| | Convert a string or number to a floating point number, if possible.| | Methods defined here:| | __abs__(self, /)| abs(self)| | __add__(self, value, /)| Return self+value.| | __bool__(self, /)| self != 0| | __divmod__(self, value, /)| Return divmod(self, value).| | __eq__(self, value, /)| Return self==value.| | __float__(self, /)| float(self)| | __floordiv__(self, value, /)| Return self//value.| | __format__(...)| float.__format__(format_spec) -> string| | Formats the float according to format_spec.| | __ge__(self, value, /)| Return self>=value.| | __getattribute__(self, name, /)| Return getattr(self, name).| | __getformat__(...) from builtins.type| float.__getformat__(typestr) -> string| | You probably don't want to use this function. It exists mainly to be| used in Python's test suite.| | typestr must be 'double' or 'float'. This function returns whichever of| 'unknown', 'IEEE, big-endian' or 'IEEE, little-endian' best describes the| format of floating point numbers used by the C type named by typestr.| | __getnewargs__(...)| | __gt__(self, value, /)| Return self>value.| | __hash__(self, /)| Return hash(self).| | __int__(self, /)| int(self)| | __le__(self, value, /)| Return self<=value.| | __lt__(self, value, /)| Return self<value.| | __mod__(self, value, /)| Return self%value.| | __mul__(self, value, /)| Return self*value.| | __ne__(self, value, /)| Return self!=value.| | __neg__(self, /)| -self| | __new__(*args, **kwargs) from builtins.type| Create and return a new object. See help(type) for accurate signature.| | __pos__(self, /)| +self| | __pow__(self, value, mod=None, /)| Return pow(self, value, mod).| | __radd__(self, value, /)| Return value+self.| | __rdivmod__(self, value, /)| Return divmod(value, self).| | __repr__(self, /)| Return repr(self).| | __rfloordiv__(self, value, /)| Return value//self.| | __rmod__(self, value, /)| Return value%self.| | __rmul__(self, value, /)| Return value*self.| | __round__(...)| Return the Integral closest to x, rounding half toward even.| When an argument is passed, work like built-in round(x, ndigits).| | __rpow__(self, value, mod=None, /)| Return pow(value, self, mod).| | __rsub__(self, value, /)| Return value-self.| | __rtruediv__(self, value, /)| Return value/self.| | __setformat__(...) from builtins.type| float.__setformat__(typestr, fmt) -> None| | You probably don't want to use this function. It exists mainly to be| used in Python's test suite.| | typestr must be 'double' or 'float'. fmt must be one of 'unknown',| 'IEEE, big-endian' or 'IEEE, little-endian', and in addition can only be| one of the latter two if it appears to match the underlying C reality.| | Override the automatic determination of C-level floating point type.| This affects how floats are converted to and from binary strings.| | __str__(self, /)| Return str(self).| | __sub__(self, value, /)| Return self-value.| | __truediv__(self, value, /)| Return self/value.| | __trunc__(...)| Return the Integral closest to x between 0 and x.| | as_integer_ratio(...)| float.as_integer_ratio() -> (int, int)| | Return a pair of integers, whose ratio is exactly equal to the original| float and with a positive denominator.| Raise OverflowError on infinities and a ValueError on NaNs.| | >>> (10.0).as_integer_ratio()| (10, 1)| >>> (0.0).as_integer_ratio()| (0, 1)| >>> (-.25).as_integer_ratio()| (-1, 4)| | conjugate(...)| Return self, the complex conjugate of any float.| | fromhex(...) from builtins.type| float.fromhex(string) -> float| | Create a floating-point number from a hexadecimal string.| >>> float.fromhex('0x1.ffffp10')| 2047.984375| >>> float.fromhex('-0x1p-1074')| -5e-324| | hex(...)| float.hex() -> string| | Return a hexadecimal representation of a floating-point number.| >>> (-0.1).hex()| '-0x1.999999999999ap-4'| >>> 3.14159.hex()| '0x1.921f9f01b866ep+1'| | is_integer(...)| Return True if the float is an integer.| | ----------------------------------------------------------------------| Data descriptors defined here:| | imag| the imaginary part of a complex number| | real| the real part of a complex number

　　

轉載于:https://www.cnblogs.com/gundan/p/8257183.html

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