`astropy.io.fits.diff:TableDataDiff`

source: /astropy/io/fits/diff.py :1234

Signature

   class     TableDataDiff (    a    ,    b    ,    ignore_fields    =  []   ,    numdiffs    =  10   ,    rtol    =  0.0   ,    atol    =  0.0     )

Members

Summary

Diff two table data arrays. It doesn't matter whether the data originally came from a binary or ASCII table--the data should be passed in as a recarray.

Extended Summary

TableDataDiff objects have the following diff attributes:

diff_column_count: If the tables being compared have different numbers of columns, this contains a 2-tuple of the column count in each table. Even if the tables have different column counts, an attempt is still made to compare any columns they have in common.
diff_columns: If either table contains columns unique to that table, either in name or format, this contains a 2-tuple of lists. The first element is a list of columns (these are full Column objects) that appear only in table a. The second element is a list of tables that appear only in table b. This only lists columns with different column definitions, and has nothing to do with the data in those columns.
diff_column_names: This is like diff_columns, but lists only the names of columns unique to either table, rather than the full Column objects.
diff_column_attributes: Lists columns that are in both tables but have different secondary attributes, such as TUNIT or TDISP. The format is a list of 2-tuples: The first a tuple of the column name and the attribute, the second a tuple of the different values.
diff_values: TableDataDiff compares the data in each table on a column-by-column basis. If any different data is found, it is added to this list. The format of this list is similar to the diff_pixels attribute on ImageDataDiff objects, though the "index" consists of a (column_name, row) tuple. For example
```
[('TARGET', 0), ('NGC1001', 'NGC1002')]
```
shows that the tables contain different values in the 0-th row of the 'TARGET' column.
diff_total and diff_ratio: Same as ImageDataDiff.

TableDataDiff objects also have a common_columns attribute that lists the Column objects for columns that are identical in both tables, and a common_column_names attribute which contains a set of the names of those columns.

Aliases

astropy.io.fits.TableDataDiff