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getlimits.cpython-35.pyc
X��f�% � @ sm d Z d d l m Z m Z m Z d d g Z d d l m Z d d l m Z d d l m Z d d l m Z d d � Z e j e j e j e j e j e j i Z Gd d � d e � Z Gd d � d e � Z e d k rie e j � Z e d e j � e d e j � e e j � Z e d e j � e d e j � e e j � Z e d e j � e d e j � d S)zJMachine limits for Float32 and Float64 and (long double) if available... � )�division�absolute_import�print_function�finfo�iinfo� )�MachAr)�numeric)� numerictypes)�arrayc C s | j d k r d | _ | S)zfix rank-0 --> rank-1r r )r )�ndim�shape)�a� r � /getlimits.py�_frz s r c @ sL e Z d Z d Z i Z d d � Z d d � Z d d � Z d d � Z d S) r a. finfo(dtype) Machine limits for floating point types. Attributes ---------- eps : float The smallest representable positive number such that ``1.0 + eps != 1.0``. Type of `eps` is an appropriate floating point type. epsneg : floating point number of the appropriate type The smallest representable positive number such that ``1.0 - epsneg != 1.0``. iexp : int The number of bits in the exponent portion of the floating point representation. machar : MachAr The object which calculated these parameters and holds more detailed information. machep : int The exponent that yields `eps`. max : floating point number of the appropriate type The largest representable number. maxexp : int The smallest positive power of the base (2) that causes overflow. min : floating point number of the appropriate type The smallest representable number, typically ``-max``. minexp : int The most negative power of the base (2) consistent with there being no leading 0's in the mantissa. negep : int The exponent that yields `epsneg`. nexp : int The number of bits in the exponent including its sign and bias. nmant : int The number of bits in the mantissa. precision : int The approximate number of decimal digits to which this kind of float is precise. resolution : floating point number of the appropriate type The approximate decimal resolution of this type, i.e., ``10**-precision``. tiny : float The smallest positive usable number. Type of `tiny` is an appropriate floating point type. Parameters ---------- dtype : float, dtype, or instance Kind of floating point data-type about which to get information. See Also -------- MachAr : The implementation of the tests that produce this information. iinfo : The equivalent for integer data types. Notes ----- For developers of NumPy: do not instantiate this at the module level. The initial calculation of these parameters is expensive and negatively impacts import times. These objects are cached, so calling ``finfo()`` repeatedly inside your functions is not a problem. c C sz y t j | � } Wn' t k r< t j t | � � } Yn X| j j | d � } | d k rb | S| g } t j | � } | | k r� | j | � | } t | t j � s� t d | � � | j j | d � } | d k r� | St | t j � st | } | | k r| j | � | } | j j | d � } | d k r@| St j | � j | � } x | D] } | | j | <q_W| S)Nzdata type %r not inexact)r �dtype� TypeError�type� _finfo_cache�getZ obj2sctype�append� issubclassZinexact� ValueErrorZfloating�_convert_to_float�object�__new__�_init)�clsr �objZdtypesZnewdtypeZdtr r r r ^ s: z finfo.__new__c s7 t j � � | _ � t j k r9 t j � d � d } n� � t j k r` t j � d � d } n` � t j k r� t j � d � d } n9 � t j k r� t j � d � d } n t t � � � � t � f d d � � f d d � � f d d � � � f d d � d | � } x9 d d d d d d g D] } t | | t | | � � q(Wx7 d d d g D]& } t | | t | | � j d � q[W| j j d | _ | j | _ | j j d | _ | j | _ | j | _ | | _ | j j � | _ | j j � | _ | j j � | _ | j j � | _ | j! j � | _! | S)Nz%24.16e�doublez%15.7e�singlez%sz long doublez%12.5e�halfc s t | g � � S)N)r )�v)r r r �<lambda>� s z finfo._init.<locals>.<lambda>c s t | j � � � d S)Nr )r Zastype)r# )�ityper r r$ � s c s t t | � d � � S)Nr )r r )r# )r r r r$ � s c s � t t | � d � � S)Nr )r r )r# )r �fmtr r r$ � s z(numpy %s precision floating point numberZ precision�iexpZmaxexpZminexpZnegepZmachep�tinyZ resolutionZepsnegr )"r r �ntypesr Zint64r! Zint32Z longdoubleZlonglongr" Zint16r �reprr �setattr�getattrZflatZhuge�max�min�epsr' Znexp�itZnmant�macharZ _str_xmin�stripZ _str_tinyZ _str_xmaxZ_str_maxZ _str_epsnegZ_str_epsZ_str_resolution)�selfr Zprecnamer1 Zwordr )r r& r% r r sR $ z finfo._initc C s d } | | j S)Na� Machine parameters for %(dtype)s --------------------------------------------------------------- precision=%(precision)3s resolution= %(_str_resolution)s machep=%(machep)6s eps= %(_str_eps)s negep =%(negep)6s epsneg= %(_str_epsneg)s minexp=%(minexp)6s tiny= %(_str_tiny)s maxexp=%(maxexp)6s max= %(_str_max)s nexp =%(nexp)6s min= -max --------------------------------------------------------------- )�__dict__)r3 r& r r r �__str__� s z finfo.__str__c C s- | j j } | j j � } | | d <d | S)N�klasszZ%(klass)s(resolution=%(resolution)s, min=-%(_str_max)s, max=%(_str_max)s, dtype=%(dtype)s))� __class__�__name__r4 �copy)r3 �c�dr r r �__repr__� s zfinfo.__repr__N) r8 � __module__� __qualname__�__doc__r r r r5 r< r r r r r s A ! . c @ sv e Z d Z d Z i Z i Z d d � Z d d � Z e e � Z d d � Z e e � Z d d � Z d d � Z d S) r a, iinfo(type) Machine limits for integer types. Attributes ---------- min : int The smallest integer expressible by the type. max : int The largest integer expressible by the type. Parameters ---------- int_type : integer type, dtype, or instance The kind of integer data type to get information about. See Also -------- finfo : The equivalent for floating point data types. Examples -------- With types: >>> ii16 = np.iinfo(np.int16) >>> ii16.min -32768 >>> ii16.max 32767 >>> ii32 = np.iinfo(np.int32) >>> ii32.min -2147483648 >>> ii32.max 2147483647 With instances: >>> ii32 = np.iinfo(np.int32(10)) >>> ii32.min -2147483648 >>> ii32.max 2147483647 c C s� y t j | � | _ Wn* t k rB t j t | � � | _ Yn X| j j | _ | j j d | _ d | j | j f | _ | j d k r� t d � � d S)N� z%s%dZiuzInvalid integer data type.) r r r r �kind�itemsize�bits�keyr )r3 Zint_typer r r �__init__� s ziinfo.__init__c C sl | j d k r d Sy t j | j } Wn: t k rc t d | j d > � } | t j | j <Yn X| Sd S)z Minimum value of given dtype.�ur r N)rA r � _min_valsrD �KeyError�intrC )r3 �valr r r r. s z iinfo.minc C s� y t j | j } Wnf t k r| | j d k rM t d | j >d � } n t d | j d >d � } | t j | j <Yn X| S)z Maximum value of given dtype.rF r )r � _max_valsrD rH rA rI rC )r3 rJ r r r r- s z iinfo.maxc C s) d } | d | j d | j d | j i S)zString representation.z�Machine parameters for %(dtype)s --------------------------------------------------------------- min = %(min)s max = %(max)s --------------------------------------------------------------- r r. r- )r r. r- )r3 r& r r r r5 s z iinfo.__str__c C s# d | j j | j | j | j f S)Nz %s(min=%s, max=%s, dtype=%s))r7 r8 r. r- r )r3 r r r r< ' s ziinfo.__repr__N) r8 r= r> r? rG rK rE r. �propertyr- r5 r< r r r r r � s - �__main__zsingle epsilon:z single tiny:zfloat epsilon:z float tiny:zlongfloat epsilon:zlongfloat tiny:N) r? Z __future__r r r �__all__r1 r � r r r) r r Zcsingler! Zcomplex_Zfloat_Z clongfloatZ longfloatr r r r r8 �f�printr/ r( �floatr r r r �<module> s, �h
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__init__.cpython-35.opt-1.pyc
2132 bytes
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__init__.cpython-35.pyc
2132 bytes
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_internal.cpython-35.opt-1.pyc
14636 bytes
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_internal.cpython-35.pyc
14636 bytes
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_methods.cpython-35.opt-1.pyc
3846 bytes
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_methods.cpython-35.pyc
3846 bytes
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arrayprint.cpython-35.opt-1.pyc
21766 bytes
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arrayprint.cpython-35.pyc
21766 bytes
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cversions.cpython-35.opt-1.pyc
599 bytes
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cversions.cpython-35.pyc
599 bytes
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defchararray.cpython-35.opt-1.pyc
69050 bytes
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defchararray.cpython-35.pyc
69050 bytes
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fromnumeric.cpython-35.opt-1.pyc
98792 bytes
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fromnumeric.cpython-35.pyc
98792 bytes
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function_base.cpython-35.opt-1.pyc
6502 bytes
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function_base.cpython-35.pyc
6502 bytes
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generate_numpy_api.cpython-35.opt-1.pyc
6625 bytes
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generate_numpy_api.cpython-35.pyc
6625 bytes
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getlimits.cpython-35.opt-1.pyc
9582 bytes
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getlimits.cpython-35.pyc
9582 bytes
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info.cpython-35.opt-1.pyc
4846 bytes
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info.cpython-35.pyc
4846 bytes
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machar.cpython-35.opt-1.pyc
8200 bytes
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machar.cpython-35.pyc
8200 bytes
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memmap.cpython-35.opt-1.pyc
9819 bytes
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memmap.cpython-35.pyc
9819 bytes
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numeric.cpython-35.opt-1.pyc
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numeric.cpython-35.pyc
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numerictypes.cpython-35.opt-1.pyc
25473 bytes
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numerictypes.cpython-35.pyc
25518 bytes
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records.cpython-35.opt-1.pyc
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records.cpython-35.pyc
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setup.cpython-35.opt-1.pyc
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setup.cpython-35.pyc
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setup_common.cpython-35.opt-1.pyc
10328 bytes
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setup_common.cpython-35.pyc
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shape_base.cpython-35.opt-1.pyc
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shape_base.cpython-35.pyc
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