GAMS Python API documentation version 24.1

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36 Class Documentation 4.18 gams.execution.GamsModifier Class Reference Instances of this class are input to GamsModelInstance.instatiate() Inheritance diagram for gams.execution.GamsModifier: Public Member Functions • def __init__ Properties Constructor. • gams_symbol property(get_gams_symbol) Symbol in the GAMS model to be modified. • update_action property(get_update_action) Type of modification. • data_symbol property(get_data_symbol) Symbol containing the data for the modification. • update_type property(get_update_type) Symbol Update Type. 4.18.1 Detailed Description object gams.execution.GamsModifier Instances of this class are input to GamsModelInstance.instatiate() A GamsModifier consists either of a GamsParameter or a triple: A GamsVariable or GamsEquation to be modified, the modification action (e.g. . Upper, Lower or Fixed for updating bounds of a variable, or Primal/Dual for updating the level/marginal of a variable or equation mainly used for starting non-linear models from different starting points), and a GamsParameter that holds the data for modification. In addition the UpdateType can be defined (if ommitted the type defined in the Solve call is used). 4.18.2 Constructor & Destructor Documentation 4.18.2.1 def gams.execution.GamsModifier. init ( self, gams symbol, update action = None, data symbol = None, update type = SymbolUpdateType. Inherit ) Constructor. Parameters gams_symbol Symbol in the GAMS model to be modified. This can be a GamsParameter, GamsVariable or GamsEquation. If a variable or an equation is specified a data_symbol and an update_action have to be specified as well. update_action Modification action data_symbol Parameter containing the data for the modification update_type Symbol Update Type (default: Inherit from model instance) GAMSPythonAPI documentation version 24.1 May 2013
4.19 gams.execution.SymbolUpdateType Class Reference 37 4.19 gams.execution.SymbolUpdateType Class Reference Symbol update type. Inheritance diagram for gams.execution.SymbolUpdateType: Static Public Attributes • int Zero 0 If record does not exist use 0 (Zero) • int BaseCase 1 object gams.execution.SymbolUpdateType If record does not exist use values from instantiation. • int Accumulate 2 If record does not exist use value from previous solve. 4.19.1 Detailed Description Symbol update type. 4.20 gams.execution.UpdateAction Class Reference What field to update. Inheritance diagram for gams.execution.UpdateAction: Static Public Attributes • int Upper 1 Supplies upper bounds for a variable. • int Lower 2 Supplies lower bounds for a variable. • int Fixed 3 Supplies fixed bounds for a variable. • int Primal 4 Supplies level for a variable or equation. • int Dual 5 Supplies marginal for a variable or equation. GAMSPythonAPI documentation version 24.1 May 2013 object gams.execution.UpdateAction
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Page 4 and 5: ii CONTENTS 4.3.1 Detailed Descript
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Page 10 and 11: 2 GAMS Python API export PYTHONPATH
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Page 14 and 15: 6 Hierarchical Index gams.options.S
Page 16 and 17: 8 Class Index gams.execution.Symbol
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Page 74 and 75: Index __init__ gams::execution::Gam
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