Difference between revisions of "0.24 Python bindings/System Calls"

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|inputs=path=None<br>setting=None<br>db=None
 
|inputs=path=None<br>setting=None<br>db=None
 
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|description=Must be provided either the name of a '''setting''', or the absolute '''path''' to an executable.
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|description=Must be provided either the name of a '''setting''', or the absolute '''path''' to an executable. If both are given, the database setting will take precedence if defined.
 
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>>> s = System(path='echo')
 
>>> s = System(path='echo')
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This class is a modified System class for handling system events received from the backend.  This class is only to be called automatically by MythSystemEvent, in order to run the executable defined in the database, and should not be called directly.
 
This class is a modified System class for handling system events received from the backend.  This class is only to be called automatically by MythSystemEvent, in order to run the executable defined in the database, and should not be called directly.
  
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[[Category:Trunk Python Bindings]]
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[[Category:0.24 Python Bindings]]

Latest revision as of 09:09, 9 November 2010

This page is for classes intended for use calling external functions and programs.

System

This class is the base handler for external calls. The class is designed to take function paths from an entry in the settings table, but direct paths can be provided instead.

__init__

Inputs Outputs Description
path=None
setting=None
db=None
self
Must be provided either the name of a setting, or the absolute path to an executable. If both are given, the database setting will take precedence if defined.
Example: 
>>> s = System(path='echo')
>>> s.path
'echo'

append

Inputs Outputs Description
*args
n/a
Append one or more strings to the command permanently. Useful if a command is to be used repeatedly.
Example: 
>>> s.append('some appended','"string"')
>>> s.path
'echo some appended "string"'

command

Inputs Outputs Description
*args
result
Apply additional string arguments to command, and return the terminal output as a string. If the command exits with a code not equal to zero, this will raise an exception, with returncode and stderr attributes populated for inspection.
Example: 
>>> s.command('some string')
'some appended string some string\n'
>>> s.command('another','string')
'some appended string another string\n'

Grabber

This class is a modified System class, following the MythTV Universal Metadata Format. This class cannot be called directly, but must be subclassed, with a 'cls' attribute defined as a result handler.

search

Inputs Outputs Description
phrase
subtitle=None
tolerance=None
func=None
iterable of Metadata
Performs a phrase or title/subtitle search. Accepts a tolerance for filtering based off the difference between the result and the search. Accepts a func to calculate the distance for filtering.

sortedSearch

Inputs Outputs Description
phrase
subtitle=None
tolerance=None
list of Metadata
Operates as search, but sorts based off search distance.

grabInetref

Inputs Outputs Description
inetref
season=None
episode=None
Metadata object
Returns a single metadata object matching the inetref and optional season and episode.

VideoGrabber

This class is a modified Grabber class, with pre-defined setting names for use with MythVideo.

__init__

Inputs Outputs Description
mode
lang='en'
db=None
self
mode can be either TV or Movie, using the grabbers defined by MythVideo.
Example: 
>>> grab = VideoGrabber('TV')
>>> grab.search('Better Off Ted', 'Heroes')
<generator object search at 0x804f1e1e0>
>>> grab.search('Better Off Ted', 'Heroes').next()
{'subtitle': 'Heroes', 'revenue': None, ... 'trailer': None}
>>> grab.grabInetref(84021, 1, 2).next()
{'subtitle': 'Heroes', 'revenue': None, ... 'trailer': None}

InternetSource

The class does not call external executables directly, but accesses data from them being run on the backend over MythXML. This class should not be run directly, but instead retrieved through MythXML.getInternetSources().

searchContent

Inputs Outputs Description
query
page=1
iterable of Metadata
Performs a search, returning an iterable of InternetMetadata objects.
Example: 
>>> igrab = xml.getInternetSources().next()
>>> igrab.searchContent('Top Gear')
<generator object searchContent at 0x804f1e410>
>>> igrab.searchContent('Top Gear').next()
{'description': "Jeremy Clarkson asks why there aren't more three-wheeled cars in the world. (R)", ... 'length': None}

SystemEvent

This class is a modified System class for handling system events received from the backend. This class is only to be called automatically by MythSystemEvent, in order to run the executable defined in the database, and should not be called directly.

Retrieved from "http://www.mythtv.org/wiki?title=0.24_Python_bindings/System_Calls&oldid=49898"