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Input argument:

data$\_$file : a string representing the file path to a txt file containing data for the spring system.

Outputs $($should be returned in the order given below$)$:

n$\_$node : an integer representing the number of nodes.

n$\_$elen : an integer representing the number of spring elements.

n$\_$load : an integer representing the number of nonzero nodal forces.

n$\_$pre$\_$disp : an integer representing the number of nodes with prescribed displacement.

elem$\_$node : a $2-$D NumPy array of size $(n\_$elem $2)$ containing the left$/$right node numbers for all string elements.

elem$\_$stiff$\_$val : a $1-$D NumPy array of length n$\_$elem containing the stiffness values for all string elements, matching the order of elen$\_$node $-$

force$\_$node : a $1-$D NumPy array of length $n_{{?}_l\text{o}\text{a}\text{d}}$ containing the node numbers of the nodes that have nonzero forces on them.

force$\_$val : a $1-$D NumPy array of length $n\_$load containing the corresponding force values.

disp$\_$node : a $1-$D NumPy array of length n$\_$pre$\_$disp containing the node numbers of the nodes that have prescribed displacement.

disp$\_$val : a $1-$D NumPy array of length $n\_$pre$\_$disp containing the corresponding prescribed displacement values.