`argv`¶

class Arguments(**kwargs)¶

Bases: object

This helper class automatically parses the arguments received by the Python script via sys.argv, using the set of key-value parameters received on its constructor to cast the types and define the defaults.

Parameters

kwargs –

A set of key-values with the defaults, or the types of the expected values. For instance, it is valid to do both:

key1 = 32. key2 = float

For the first case - a value -, if no value is passed via sys.argv, this will be the default. Otherwise, its type (float) will be used to cast the received value.

For the second case - a type -, if no value is passed via sys.argv, the parameter will default to None. Otherwise, the type will be used to cast the received value.

Callables are also accepted. They should accept to be called with no parameters, returning the default, or with a single string, returning the parsed value.

Values can be accessed later as attributes:

instance.key1 and instance.key2

Raises

ValueError – If the cast of the parameter failed (i.e. an invalid integer or float format)
KeyError – If additional unknown parameters are received

class FileList(value)¶

Bases: object

Helper class for receiving a globing pattern as a parameter, defining a list of files - i.e. measurement images or PSFs. It is an iterable, and can be passed directly to load_fits_images.

Parameters: value (str) – A file globing expression. i.e “.psf”, “band_[r|i|g]_.fits” or similar. The result is always stored and returned in alphabetical order, so the order between two file lists - i.e frame image and PSF - is consistent and a matching can be done easily between them.

argv¶

`argv`¶