BaseHeader#

class astropy.io.ascii.BaseHeader[source]#

Bases: object

Base table header reader.

Attributes Summary

`auto_format`	format string for auto-generating column names
`colnames`	Return the column names of the table.
`comment`	regular expression for comment lines
`names`	list of names corresponding to each data column
`start_line`	None, int, or a function of `lines` that returns None or int
`write_comment`
`write_spacer_lines`

Methods Summary

`check_column_names`(names, strict_names, guessing)	Check column names.
`get_col_type`(col)
`get_cols`(lines)	Initialize the header Column objects from the table `lines`.
`get_type_map_key`(col)
`process_lines`(lines)	Generator to yield non-blank and non-comment lines.
`remove_columns`(names)	Remove several columns from the table.
`rename_column`(name, new_name)	Rename a column.
`update_meta`(lines, meta)	Extract any table-level metadata, e.g. keywords, comments, column metadata, from the table `lines` and update the OrderedDict `meta` in place.
`write`(lines)
`write_comments`(lines, meta)

Attributes Documentation

auto_format = 'col{}'#: format string for auto-generating column names

colnames#: Return the column names of the table.

comment = None#: regular expression for comment lines

names = None#: list of names corresponding to each data column

start_line = None#: None, int, or a function of lines that returns None or int

write_comment = False#

write_spacer_lines = ['ASCII_TABLE_WRITE_SPACER_LINE']#

Methods Documentation

check_column_names(names, strict_names, guessing)[source]#

Check column names.

This must be done before applying the names transformation so that guessing will fail appropriately if names is supplied. For instance if the basic reader is given a table with no column header row.

Parameters:

namespython:list: User-supplied list of column names
strict_namesbool: Whether to impose extra requirements on names
guessingbool: True if this method is being called while guessing the table format

get_col_type(col)[source]#

get_cols(lines)[source]#

Initialize the header Column objects from the table lines.

Based on the previously set Header attributes find or create the column names. Sets self.cols with the list of Columns.

Parameters:

linespython:list: List of table lines

get_type_map_key(col)[source]#

process_lines(lines)[source]#: Generator to yield non-blank and non-comment lines.

remove_columns(names)[source]#

Remove several columns from the table.

Parameters:

namespython:list: A list containing the names of the columns to remove

rename_column(name, new_name)[source]#

Rename a column.

Parameters:

namepython:str: The current name of the column.
new_namepython:str: The new name for the column

update_meta(lines, meta)[source]#: Extract any table-level metadata, e.g. keywords, comments, column metadata, from the table lines and update the OrderedDict meta in place. This base method extracts comment lines and stores them in meta for output.

write(lines)[source]#

write_comments(lines, meta)[source]#