CkAtom Python Reference Documentation

CkAtom

Represents an Atom document. The Atom API allows one to download, create and modify Atom documents.

Object Creation

obj = chilkat.CkAtom()

Properties

# boolVal is a boolean
boolVal = atom.get_AbortCurrent();

Introduced in version 9.5.0.58

When set to True, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to False when the next method is called. When the abort occurs, this property is reset to False. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

# strVal is a string
# ckStr is a CkString
atom.get_DebugLogFilePath(ckStr);
strVal = atom.debugLogFilePath();
atom.put_DebugLogFilePath(strVal);

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

# strVal is a string
# ckStr is a CkString
atom.get_LastErrorHtml(ckStr);
strVal = atom.lastErrorHtml();

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

# strVal is a string
# ckStr is a CkString
atom.get_LastErrorText(ckStr);
strVal = atom.lastErrorText();

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

Concept of LastErrorText

LastErrorText Standard Information

# strVal is a string
# ckStr is a CkString
atom.get_LastErrorXml(ckStr);
strVal = atom.lastErrorXml();

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

# boolVal is a boolean
boolVal = atom.get_LastMethodSuccess();
atom.put_LastMethodSuccess(boolVal);

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = True and failure = False.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

# intVal is an integer
intVal = atom.get_NumEntries();

Number of entries in the Atom document.

# boolVal is a boolean
boolVal = atom.get_Utf8();
atom.put_Utf8(boolVal);

When set to True, all "const char *" arguments are interpreted as utf-8 strings. If set to False (the default), then "const char *" arguments are interpreted as ANSI strings. Also, when set to True, and Chilkat method returning a "const char *" is returning the utf-8 representation. If set to False, all "const char *" return values are ANSI strings.

# boolVal is a boolean
boolVal = atom.get_VerboseLogging();
atom.put_VerboseLogging(boolVal);

If set to True, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is False. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

# strVal is a string
# ckStr is a CkString
atom.get_Version(ckStr);
strVal = atom.version();

Version of the component/library, such as "9.5.0.63"

Methods

# tag is a string
# value is a string
retInt = atom.AddElement(tag, value);

Adds a new element to the Atom document. The tag is a string such as "title", "subtitle", "summary", etc. Returns the index of the element added, or -1 for failure.

# tag is a string
# dateTimeStr is a string
retInt = atom.AddElementDateStr(tag, dateTimeStr);

Adds a new date-formatted element to the Atom document. The tag is a string such as "created", "modified", "issued", etc. The dateTimeStr should be an RFC822 formatted date/time string such as "Tue, 25 Sep 2012 12:25:32 -0500". Returns the index of the element added, or -1 for failure.

# tag is a string
# dateTime is a CkDateTime
retInt = atom.AddElementDt(tag, dateTime);

Adds a new date-formatted element to the Atom document. The tag is a string such as "created", "modified", "issued", etc. Returns the index of the element added, or -1 for failure.

# tag is a string
# htmlStr is a string
retInt = atom.AddElementHtml(tag, htmlStr);

Adds a new HTML formatted element to the Atom document. Returns the index of the element added, or -1 for failure.

# tag is a string
# xmlStr is a string
retInt = atom.AddElementXHtml(tag, xmlStr);

Adds a new XHTML formatted element to the Atom document. Returns the index of the element added, or -1 for failure.

# tag is a string
# xmlStr is a string
retInt = atom.AddElementXml(tag, xmlStr);

Adds a new XML formatted element to the Atom document. Returns the index of the element added, or -1 for failure.

# xmlStr is a string
atom.AddEntry(xmlStr);

Adds an "entry" Atom XML document to the caller's Atom document.

# rel is a string
# href is a string
# title is a string
# typ is a string
atom.AddLink(rel, href, title, typ);

Adds a link to the Atom document.

# tag is a string
# name is a string
# uri is a string
# email is a string
atom.AddPerson(tag, name, uri, email);

Adds a person to the Atom document. The tag should be a string such as "author", "contributor", etc. If a piece of information is not known, an empty string or NULL value may be passed.

# tag is a string
# index is an integer
atom.DeleteElement(tag, index);

Removes the Nth occurrence of a given element from the Atom document. Indexing begins at 0. For example, to remove the 2nd category, set tag = "category" and index = 1.

# tag is a string
# index is an integer
# attrName is a string
atom.DeleteElementAttr(tag, index, attrName);

Remove an attribute from an element.The index should be 0 unless there are multiple elements having the same tag, in which case it selects the Nth occurrence based on the index ( 0 = first occurrence ).

# tag is a string
# index is an integer
atom.DeletePerson(tag, index);

Deletes a person from the Atom document. The tag is a string such as "author". The index should be 0 unless there are multiple elements having the same tag, in which case it selects the Nth occurrence based on the index. For example, DeletePerson("author",2) deletes the 3rd author.

# url is a string
status = atom.DownloadAtom(url);

Download an Atom feed from the Internet and load it into the Atom object.

Returns True for success, False for failure.

# returns a CkTask
# url is a string
ret_task = atom.DownloadAtomAsync(url);

Creates an asynchronous task to call the DownloadAtom method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns None on failure

How to Run an Asynchronous Task

# tag is a string
# index is an integer
# outStr is a CkString (output)
status = atom.GetElement(tag, index, outStr);
retStr = atom.getElement(tag, index);

Returns the content of the Nth element having a specified tag.

Returns True for success, False for failure.

# tag is a string
# index is an integer
# attrName is a string
# outStr is a CkString (output)
status = atom.GetElementAttr(tag, index, attrName, outStr);
retStr = atom.getElementAttr(tag, index, attrName);

Returns the value of an element's attribute. The element is selected by the tag name and the index (the Nth element having a specific tag) and the attribute is selected by name.

Returns True for success, False for failure.

# tag is a string
retInt = atom.GetElementCount(tag);

The number of elements having a specific tag.

# tag is a string
# index is an integer
# outStr is a CkString (output)
status = atom.GetElementDateStr(tag, index, outStr);
retStr = atom.getElementDateStr(tag, index);

Returns an element's value as a date/time in an RFC822 formatted string, such as such as "Tue, 25 Sep 2012 12:25:32 -0500".

Returns True for success, False for failure.

# returns a CkDateTime
# tag is a string
# index is an integer
ret_ckDateTime = atom.GetElementDt(tag, index);

Returns an element's value as a date/time object.

Returns None on failure

# returns a CkAtom
# index is an integer
ret_atom = atom.GetEntry(index);

Returns the Nth entry as an Atom object. (Indexing begins at 0)

Returns None on failure

# relName is a string
# outStr is a CkString (output)
status = atom.GetLinkHref(relName, outStr);
retStr = atom.getLinkHref(relName);

Returns the href attribute of the link having a specified "rel" attribute (such as "service.feed", "alternate", etc.).

Returns True for success, False for failure.

# tag is a string
# index is an integer
# tag2 is a string
# outStr is a CkString (output)
status = atom.GetPersonInfo(tag, index, tag2, outStr);
retStr = atom.getPersonInfo(tag, index, tag2);

Returns a piece of information about a person. To get the 2nd author's name, call GetPersonInfo("author",1,"name").

Returns True for success, False for failure.

# attrName is a string
# outStr is a CkString (output)
status = atom.GetTopAttr(attrName, outStr);
retStr = atom.getTopAttr(attrName);

Returns the value of an attribute on the top-level XML node. The tag of a top-level Atom XML node is typically "feed" or "entry", and it might have attributes such as "xmlns" and "xml:lang".

Returns True for success, False for failure.

# tag is a string
retBool = atom.HasElement(tag);

True (1) if the element exists in the Atom document. Otherwise 0.

# xmlStr is a string
status = atom.LoadXml(xmlStr);

Loads the Atom document from an XML string.

Returns True for success, False for failure.

atom.NewEntry();

Initializes the Atom document to be a new "entry".

atom.NewFeed();

Initializes the Atom document to be a new "feed".

# path is a string
status = atom.SaveLastError(path);

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns True for success, False for failure.

# tag is a string
# index is an integer
# attrName is a string
# attrValue is a string
atom.SetElementAttr(tag, index, attrName, attrValue);

Adds or replaces an attribute on an element.

# attrName is a string
# value is a string
atom.SetTopAttr(attrName, value);

Adds or replaces an attribute on the top-level XML node of the Atom document.

# outStr is a CkString (output)
status = atom.ToXmlString(outStr);
retStr = atom.toXmlString();

Serializes the Atom document to an XML string.

Returns True for success, False for failure.

# tag is a string
# index is an integer
# value is a string
atom.UpdateElement(tag, index, value);

Replaces the content of an element.

# tag is a string
# index is an integer
# dateTimeStr is a string
atom.UpdateElementDateStr(tag, index, dateTimeStr);

Replaces the content of a date-formatted element. The index should be an RFC822 formatted date/time string.

# tag is a string
# index is an integer
# dateTime is a CkDateTime
atom.UpdateElementDt(tag, index, dateTime);

Replaces the content of a date-formatted element.

# tag is a string
# index is an integer
# htmlStr is a string
atom.UpdateElementHtml(tag, index, htmlStr);

Replaces the content of an HTML element.

# tag is a string
# index is an integer
# xmlStr is a string
atom.UpdateElementXHtml(tag, index, xmlStr);

Replaces the content of an XHTML element.

# tag is a string
# index is an integer
# xmlStr is a string
atom.UpdateElementXml(tag, index, xmlStr);

Replaces the content of an XML element.

# tag is a string
# index is an integer
# name is a string
# uri is a string
# email is a string
atom.UpdatePerson(tag, index, name, uri, email);

Replaces the content of a person. To update the 3rd author, call UpdatePerson("author",2,"new name","new URL","new email"). If a piece of information is not known, pass an empty string or a NULL.