Chandra X-Ray Observatory
	(CXC)
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Last modified: December 2013

URL: http://cxc.harvard.edu/ciao/ahelp/get_key_names.html
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AHELP for CIAO 4.9

get_key_names

Context: crates

Synopsis

Return an array of the keywords in a crate.

Syntax

get_key_names(crate)

Description

Argument Description
crate A Crate object such as a TABLECrate or IMAGECrate

The get_key_names command retrieves the keywords in the crate as an array of strings. The get_keyval routine can be used to read the value of a single keyword.

Example

>>> cr = read_file("evt2.fits")
>>> keys = get_key_names(cr)
>>> print(keys[10:15])
['DATE-OBS' 'DATE-END' 'TIMESYS' 'MJDREF' 'TIMEZERO']

Retrieve the keywords from the crate "cr", then print out five elements of the array.

Bugs

See the bug pages on the CIAO website for an up-to-date listing of known bugs.

Refer to the CIAO bug pages for an up-to-date listing of known issues.

See Also

crates
add_key, copy_piximgvals, cratekey, delete_key, get_axis_transform, get_col, get_col_names, get_colvals, get_crate_item_type, get_crate_type, get_key, get_keyval, get_number_cols, get_number_rows, get_piximg, get_piximg_shape, get_piximgvals, get_transform, get_transform_matrix, key_exists, set_key, set_keyval

Last modified: December 2013
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