add_key

Synopsis

Add a keyword to a crate given a CrateKey object.

add_key(crate, cratekey)

Description

• crate - input crate
• cratekey - CrateKey object to be added

The add_key command adds the keyword to the end of the keyword list in the crate. If the keyword already exists, the value is replaced.

The set_key routine can be used to create a keyword without having to create a CrateKey object.

The write_file ("ahelp write_file") command can be used to save the modified crate to a file.

Example

>>> cr = read_file("evt2.fits")
>>> key = CrateKey()
>>> key.name = "TIMEDEL"
>>> key.value("0.00285")
>>> key.unit = "s"
>>> add_key(cr, key)

Create a new key named "TIMEDEL" with a value of 0.00285 and units of seconds, then add it to the crate.

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

contrib

add_keyval, make_image_crate, make_table_crate, scale_image_crate, set_key, smooth_image_crate, write_arrays, write_columns

crates

add_col, add_piximg, cratekey, delete_col, delete_key, delete_piximg, get_key, get_key_names, get_keyval, key_exists, read_file, read_pha, read_rmf, set_keyval, write_file, write_pha, write_rmf