60 lines
2.0 KiB
Python
60 lines
2.0 KiB
Python
from ..target.ATarget import ATarget
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from ..SpectralQty import SpectralQty
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import astropy.units as u
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from ..Entry import Entry
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from typing import Union
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import os.path
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class FileTarget(ATarget):
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"""
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A class to create a target from a file containing the spectral flux densities
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"""
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@u.quantity_input(wl_bins="length")
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def __init__(self, file: str, wl_bins: u.Quantity, size: str = "Point"):
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"""
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Initialize a new target from a file containing the spectral flux density values
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Parameters
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----------
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file : str
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The file to read the spectral flux density values from. The file needs to provide two columns: wavelength
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and the corresponding spectral flux density. The format of the file will be guessed by
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`astropy.io.ascii.read(). If the file doesn't provide units via astropy's enhanced CSV format, the units
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will be read from the column headers or otherwise assumed to be *nm* and *W / m^2 / nm*.
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wl_bins : length-Quantity
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Wavelengths used for binning
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size : str
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The size of the target. Can be either point or extended.
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"""
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# Create spectral quantity from file
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sfd = SpectralQty.fromFile(file, u.nm, u.W / (u.m ** 2 * u.nm))
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# Initialize the super class
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super().__init__(sfd, wl_bins, size)
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@staticmethod
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def check_config(conf: Entry) -> Union[None, str]:
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"""
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Check the configuration for this class
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Parameters
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----------
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conf : Entry
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The configuration entry to be checked.
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Returns
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-------
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mes : Union[None, str]
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The error message of the check. This will be None if the check was successful.
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"""
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mes = conf.check_file("file")
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if mes is not None:
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return mes
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mes = conf.check_quantity("wl_bins", u.m)
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if mes is not None:
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return mes
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mes = conf.check_selection("size", ["point", "extended"])
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if mes is not None:
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return mes
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