Initializing help system before first use

# problem.getControl

Purpose
Retrieves one or more controls of a problem. Can also be used to retrieve objective controls.
Synopsis
`c = problem.getControl(ctrl1, ctrl2, ..., objidx=None)`
Arguments

ctrl1,ctrl2,... | Names or numeric ids of the controls whose values to retrieve. If the objidx argument is provided, the control must be one of the following objective controls:
priority | the priority of the objective
weight | the weight of the objective
reltol | the relative tolerance of the objective
abstol | the absolute tolerance of the objective
rhs | the constant part of the objective
objidx | (optional) Index of the objective whose control to retrieve.

Example

    p = xpress.problem()
    [...]
    print("tolerance for feasibility and optimality: ",
      p.getControl('feastol'), p.getControl('miprelstop'))
    all_ctrls = p.getControl()
    ctrl_subset = p.getControl(['presolve', 'miprelstop', 'feastol'])

Further information
This function can be passed either a single control name, whose value will be returned, or a list of control names, in which case the return value is a dictionary associating each key in the list with its value. If no argument is provided, a dictionary containing all controls of the problem will be returned. Controls can also be specified by id. In that case the keys for those controls in a returned dictionary will be their ids.
Related topics
problem.setControl.
Parent Topic Methods of the class problem

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