Multi-Condition Association

Function Description

The OPS allows you to associate multiple conditions with an OPS object.

Command Prototype

opsObj.correlate("correlation expression")

Parameter Description

Table 1 describes the parameters supported by multi-condition association APIs.

**Table 1** Parameters supported by multi-condition association APIs
Method	Description
opsObj	Specifies an OPS object. It is obtained through ops.ops() instantiation.
correlation expression	The value is a string of a maximum of 128 characters, consisting of a condition identifier string and an operator (and, or, or andnot). Operators and and andnot have the same priority, which is greater than that of or.

Description of Return Values

First return value: The value 0 indicates a success, and the value 1 indicates a failure.
Second return value: This value describes success or failure reasons, expressed in a character string.

Example

test.py

import ops

def ops_condition(_ops): 
       ret1, reason1 = _ops.cli.subscribe("con1","display device",True,True,False,20)
       ret2, reason2 = _ops.cli.subscribe("con2","display this",True,True,False,20)
       _ops.correlate("con1 and con2")

def ops_execute(_ops): 
       _ops.terminal.write("Hello world!",None) 
       return 0

When con1 and con2 are both met, the assistant is triggered.