ó šßÈ[c@`sñdZddlmZmZmZmZddlZddlm Z ddl m Z m Z ddl mZmZdd lmZdd lmZdd lmZdd lmZd ddgZead„Zde fd„ƒYZdddgZd„Zdedded„Z dded„Z!ej"eƒDej#dee ƒej$dee!ƒej%deej&j'ƒWdQXye jej(_Wn#e)k r³e jej(j*_nXye!jej+_Wn#e)k rìe!jej+j*_nXdS(u.This module implements the base CCDData class.i(tabsolute_importtdivisiontprint_functiontunicode_literalsNi(t NDDataArray(tStdDevUncertaintyt NDUncertaintyi(tfitstregistry(tunits(tlog(tWCS(t sharedmethoduCCDDataufits_ccddata_readerufits_ccddata_writerc`s‡fd†}|S(u Decorator factory which temporarly disables the need for a unit when creating a new CCDData instance. The final result must have a unit. Parameters ---------- op : function The function to apply. Supported are: - ``np.add`` - ``np.subtract`` - ``np.multiply`` - ``np.true_divide`` Notes ----- Should only be used on CCDData ``add``, ``subtract``, ``divide`` or ``multiply`` because only these methods from NDArithmeticMixin are overwritten. c`s1d‡fd†}dj|jƒ|_t|ƒS(Nc`s1ta|jˆ|||}ta|j|ƒS(N(tFalset_config_ccd_requires_unitt_prepare_then_do_arithmetictTruet __class__(tselftoperandtoperand2tkwargstresult(top(s5lib/python2.7/site-packages/astropy/nddata/ccddata.pytinner/s   u*See `astropy.nddata.NDArithmeticMixin.{}`.(tNonetformatt__name__t__doc__R (tfuncR(R(s5lib/python2.7/site-packages/astropy/nddata/ccddata.pyt decorator.s((RR((Rs5lib/python2.7/site-packages/astropy/nddata/ccddata.pyt _arithmetics tCCDDatacB`sCeZdZd„Zed„ƒZejd„ƒZed„ƒZejd„ƒZed„ƒZejd„ƒZed„ƒZ e jd „ƒZ ed „ƒZ e jd „ƒZ d d de d„Z d„ZeejƒejƒZeejƒejƒZeejƒejƒZeejƒejƒZd„ZRS(u´ A class describing basic CCD data. The CCDData class is based on the NDData object and includes a data array, uncertainty frame, mask frame, flag frame, meta data, units, and WCS information for a single CCD image. Parameters ----------- data : `~astropy.nddata.CCDData`-like or `numpy.ndarray`-like The actual data contained in this `~astropy.nddata.CCDData` object. Note that the data will always be saved by *reference*, so you should make a copy of the ``data`` before passing it in if that's the desired behavior. uncertainty : `~astropy.nddata.StdDevUncertainty`, `numpy.ndarray` or None, optional Uncertainties on the data. Default is ``None``. mask : `numpy.ndarray` or None, optional Mask for the data, given as a boolean Numpy array with a shape matching that of the data. The values must be `False` where the data is *valid* and `True` when it is not (like Numpy masked arrays). If ``data`` is a numpy masked array, providing ``mask`` here will causes the mask from the masked array to be ignored. Default is ``None``. flags : `numpy.ndarray` or `~astropy.nddata.FlagCollection` or None, optional Flags giving information about each pixel. These can be specified either as a Numpy array of any type with a shape matching that of the data, or as a `~astropy.nddata.FlagCollection` instance which has a shape matching that of the data. Default is ``None``. wcs : `~astropy.wcs.WCS` or None, optional WCS-object containing the world coordinate system for the data. Default is ``None``. meta : dict-like object or None, optional Metadata for this object. "Metadata" here means all information that is included with this object but not part of any other attribute of this particular object, e.g. creation date, unique identifier, simulation parameters, exposure time, telescope name, etc. unit : `~astropy.units.Unit` or str, optional The units of the data. Default is ``None``. .. warning:: If the unit is ``None`` or not otherwise specified it will raise a ``ValueError`` Raises ------ ValueError If the ``uncertainty`` or ``mask`` inputs cannot be broadcast (e.g., match shape) onto ``data``. Methods ------- read(\*args, \**kwargs) ``Classmethod`` to create an CCDData instance based on a ``FITS`` file. This method uses :func:`fits_ccddata_reader` with the provided parameters. write(\*args, \**kwargs) Writes the contents of the CCDData instance into a new ``FITS`` file. This method uses :func:`fits_ccddata_writer` with the provided parameters. Notes ----- `~astropy.nddata.CCDData` objects can be easily converted to a regular Numpy array using `numpy.asarray`. For example:: >>> from astropy.nddata import CCDData >>> import numpy as np >>> x = CCDData([1,2,3], unit='adu') >>> np.asarray(x) array([1, 2, 3]) This is useful, for example, when plotting a 2D image using matplotlib. >>> from astropy.nddata import CCDData >>> from matplotlib import pyplot as plt # doctest: +SKIP >>> x = CCDData([[1,2,3], [4,5,6]], unit='adu') >>> plt.imshow(x) # doctest: +SKIP cO`sd|kr%|jddƒ|d%!  $ cC`s|j|dtƒS(u6 Return a copy of the CCDData object. R5(RR(R((s5lib/python2.7/site-packages/astropy/nddata/ccddata.pyR5PscC`szt|ƒdkrit|ƒdkri|d }|dj|ƒf|jdj|jƒƒ<||j|tignore_missingN(R t ExceptionR R;RttypeRtstrRR,tctypeR5RGRt_KEEP_THESE_KEYWORDS_IN_HEADERtremove(thdrR,texctnew_hdrR[RY((s5lib/python2.7/site-packages/astropy/nddata/ccddata.pyt_generate_wcs_and_update_header„s      uUNCERTuMASKcK`sîidd6dd6}xS|jƒD]E\}} ||kr!dj|ƒ} tdj| | gƒƒ‚q!q!Wtj||l} | |j} |dk rº|| krºt| |j ƒ} nd} |dk rô|| krô| |j j t j ƒ}nd}|dk r!|| kr!t dƒ‚n|dkrâ| |j dkrâxŸtt| ƒƒD]ˆ}| j|ƒ|d d krS| j|ƒd dkrS|}| |jjƒ}|j| d tƒ|} tjd j|ƒƒPqSqSWnd| kr"| d}|jƒjƒdkr(|jƒ}q(nd}|r•|dkryytj|ƒ}Wq’tk rutdj|ƒƒ‚q’Xq•tjdj||ƒƒn|pž|}t| ƒ\} }t| |j d| d|d|d| d|ƒ}WdQX|S(uU Generate a CCDData object from a FITS file. Parameters ---------- filename : str Name of fits file. hdu : int, optional FITS extension from which CCDData should be initialized. If zero and and no data in the primary extension, it will search for the first extension with data. The header will be added to the primary header. Default is ``0``. unit : `~astropy.units.Unit`, optional Units of the image data. If this argument is provided and there is a unit for the image in the FITS header (the keyword ``BUNIT`` is used as the unit, if present), this argument is used for the unit. Default is ``None``. hdu_uncertainty : str or None, optional FITS extension from which the uncertainty should be initialized. If the extension does not exist the uncertainty of the CCDData is ``None``. Default is ``'UNCERT'``. hdu_mask : str or None, optional FITS extension from which the mask should be initialized. If the extension does not exist the mask of the CCDData is ``None``. Default is ``'MASK'``. hdu_flags : str or None, optional Currently not implemented. Default is ``None``. kwd : Any additional keyword parameters are passed through to the FITS reader in :mod:`astropy.io.fits`; see Notes for additional discussion. Notes ----- FITS files that contained scaled data (e.g. unsigned integer images) will be scaled and the keywords used to manage scaled data in :mod:`astropy.io.fits` are disabled. uImage data must be scaled.udo_not_scale_image_datau#Scale information is not preserved.u scale_backuunsupported keyword: {0}.u u)loading flags is currently not supported.iiuImageHDUudatSpantuniqueu%first HDU with data is extension {0}.ubunituaduuáThe Header value for the key BUNIT ({}) cannot be interpreted as valid unit. To successfully read the file as CCDData you can pass in a valid `unit` argument explicitly or change the header of the FITS file before reading it.uVusing the unit {0} passed to the FITS reader instead of the unit {1} in the FITS file.R2R%RJR4R,N(RCRR<tjoinRtopenR1RRR)RMR8tbool_RRtrangeRaR;tfileinfoR5RHRR tstriptlowerR.R/R"RwR (tfilenamethduR%RURTRVR'tunsupport_open_keywordsRctmsgtprefixR\RtR4RJtitcomb_hdrtfits_unit_stringtuse_unitR,tccd_data((s5lib/python2.7/site-packages/astropy/nddata/ccddata.pytfits_ccddata_reader­s`.  "          cK`s2|jd|d|d|ƒ}|j||dS(u» Write CCDData object to FITS file. Parameters ---------- filename : str Name of file. hdu_mask, hdu_uncertainty, hdu_flags : str or None, optional If it is a string append this attribute to the HDUList as `~astropy.io.fits.ImageHDU` with the string as extension name. Flags are not supported at this time. If ``None`` this attribute is not appended. Default is ``'MASK'`` for mask, ``'UNCERT'`` for uncertainty and ``None`` for flags. kwd : All additional keywords are passed to :py:mod:`astropy.io.fits` Raises ------- ValueError - If ``self.mask`` is set but not a `numpy.ndarray`. - If ``self.uncertainty`` is set but not a `~astropy.nddata.StdDevUncertainty`. - If ``self.uncertainty`` is set but has another unit then ``self.data``. NotImplementedError Saving flags is not supported. RTRURVN(R`twriteto(R‰R€RTRURVR'R((s5lib/python2.7/site-packages/astropy/nddata/ccddata.pytfits_ccddata_writer)s! ufits(,Rt __future__RRRRtnumpyR8tcompatRt nduncertaintyRRtioRRtR R.R R,R tutils.decoratorsR t__all__RRRR RrRwRRŠRŒtdelay_doc_updatestregister_readertregister_writertregister_identifiertconnecttis_fitstreadtAttributeErrort__func__twrite(((s5lib/python2.7/site-packages/astropy/nddata/ccddata.pytsD"  #ÿB  ) {%