Initializing help system before first use

xpress.free

Purpose
Releases the Xpress environment, thus freeing up one license. The subsequent creation of a problem automatically triggers a call to xpress.init.
Synopsis
xpress.free ()
Example
The following example shows how to call xpress.free and a possible use: 
p = xp.problem() # This would imply a call to xp.init()
x = p.addVariable()
y = p.addVariable()
p.addConstraint(x+y <= 1)
p.setObjective(x+2*y, sense=xp.maximize)
p.optimize()
xp.free() # from this point on, the license
           # can be claimed by other users
Further information
1. Similar to a call to XPRSfree() of the C API, calling xpress.free cleans the Xpress environment. Any problem created prior to a call to xpress.free is no longer valid, and attempting to use it will raise an xpress.ModelError.
2. Instead of using this function, it is recommended to call xpress.init in a with statement, which implicitly calls xpress.free at the end of the statement.
Related topics
xpress.init

Parent Topic Xpress base functions

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