Header Class
azcam.header
Contains the Header and System classes.
Header
Bases: object
Defines the Header class which is used to create and manipulate headers contained in many azcam tools.
Attributes:
| Name | Type | Description |
|---|---|---|
self.title |
str
|
header title dictionary {index:title_line} |
self.keywords |
dict
|
header keywords dictionary {keyword:keywordstring} |
self.values |
dict
|
header values dictionary {keyword:value} |
self.comments |
dict
|
header comments dictionary {keyword:comment} |
self.typestrings |
dict
|
header typestrings dictionary {keyword:typestring) |
self.items |
list
|
list of header objects |
__init__(title='', template=None)
Create instance.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
title
|
str
|
title of header to be used in image header |
''
|
template
|
str | None
|
filename of template file with static header info |
None
|
convert_type(value, pythontype)
Convert a value to a specific type.
copy_all_items(ptr_header)
Copy all items from the specified header object to the current image header.
delete_all_items()
Delete all header items
delete_all_keywords()
Delete all keywords.
delete_keyword(keyword)
Delete a keyword.
get_header()
Returns the header list. Returns: list of header lines: [Header[]]: Each element contains (keyword,value,comment,type).
get_keyword(keyword)
Return a keyword value, its comment string, and type. Comment always returned in double quotes, even if empty. Args: keyword (str): name of keyword Returns: list of [keyword, comment, type]
get_keywords()
Return a list of all keyword names. Returns: keywords: list of all keywords
get_string()
Returns the entire header as a single formatted string.
read_file(filename='')
Read a header file and import the data into the header.
set_header(object_name, order=-1)
Sets object_name in the global header dictionary. order defines how headers are written in image files.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
object_name
|
str
|
name of header object |
required |
order
|
int
|
order to be shown in image header (-1 next) |
-1
|
set_keyword(keyword, value, comment=None, typestring=None)
Set a keyword value, comment, and type. Args: keyword: keyword value: value of keyword comment: comment string typestring: one of 'str', 'int', or 'float'
set_keyword_string(keystring)
Set keyword data from a single string.
set_title(title)
Set the title of the header.
update()
Update header.
ObjectHeaderMethods
Bases: object
Header methods for main objects. These are called like "controller.get_keyword()".
define_keywords()
Defines and resets keywords.
delete_keyword(keyword)
Delete a keyword. Args: keyword: keyword
get_keyword(keyword)
Return a keyword value, its comment string, and type. Comment always returned in double quotes, even if empty. Args: keyword: name of keyword Returns: list of [keyword, comment, type]
get_keywords()
Return a list of all keyword names. Returns: keywords: list of all keywords
read_header()
Reads and returns current header data. Returns: list of header lines: [Header[]]: Each element contains (keyword,value,comment,type).
set_keyword(keyword, value, comment='none', typestring='none')
Set a keyword value, comment, and type. Args: keyword: keyword value: value of keyword comment: comment string typestring: one of 'str', 'int', or 'float'
update_header()
Update the header, reading current data. Deletes all keywords if the object is not enabled.