Utilities

lfd.gui.imagechecker.utils.create_imageDB(filenamestr, saveURI, echo=False)

Finds all paths to matching files given by filenamestr, extracts their frame identifiers and stores them in a database given by saveURI.

Examples

Filenamestr can contain wildcards, f.e.:

>>> create_imageDB("/path/to/dir_containing_subdirs/*/*.png",
    "sqlite:///foo.db")

will find all /path/to/dir/subdirs/frame-run-camcol-filter-frame.png styled filenames and add their frame identifiers and paths to foo DB.

Parameters:

• filenamestr (str) – wildcarded string that will be used to match all desired image files
• saveURI (str) – URI containing type and location of the images database

lfd.gui.imagechecker.utils.eventId2Filename(eventid, type='.png')

From an event id constructs a SDSS styled filename via frameId2Filename function.

Parameters:

• eventid (int) – unique Event identifier
• type (str) – file extension (.png, .jpeg etc…)

lfd.gui.imagechecker.utils.eventId2FrameId(eventid)

Returns frame identifiers (run, camcol, filter, field) for an Event identified by given event id.

Parameters:eventid (int) – unique Event identifier

lfd.gui.imagechecker.utils.filename2frameId(filename)

From an SDSS style filename of the:

frame-{filter}-{run:06d}-{camcol}-{field:04}.fits.{type}

format extracts frame identifiers (run, camcol, filter, field).

Parameters:filename (str) – just the filename, no prepended path

lfd.gui.imagechecker.utils.filepath2frameId(filepath)

From a filepath extracts SDSS frame identifiers. Filepath must be of the followng format:

/path/to/frame-{filter}-{run:06d}-{camcol}-{field:04}.fits.{type}

Parameters:filepath (str) – path-like string

lfd.gui.imagechecker.utils.frameId2Filename(run, camcol, filter, field, type='.png')

Translates between frame identifiers and SDSS style filename of the:

frame-{filter}-{run:06d}-{camcol}-{field:04}.fits.{type}

format, where type represents the .png, .jpg or other extensions.

Parameters:

• run (int) – run identifier
• camcol (int) – camcol identifier
• filter (str) – string identifier
• field (int) – field identifier
• type (str) – file extension (.png, .jpeg etc…)