weldx.MathematicalExpression

class weldx.MathematicalExpression(expression, parameters=None)

Mathematical expression using sympy syntax.

Construct a MathematicalExpression.

Parameters:

• expression (Union[Expr, str]) – A sympy expression or a string that can be evaluated as one.

• parameters (Union[Quantity, str, Tuple[Quantity, str], DataArray, None]) – A dictionary containing constant values for variables of the expression.

Methods

equals	Compare the instance with another object for equality and return the result.
evaluate	Evaluate the expression for specific variable values.
get_variable_names	Get a list of all expression variables.
set_parameter	Define an expression parameter as constant value.
set_parameters	Set the expressions parameters.

Attributes

expression	Return the internal sympy expression.
num_parameters	Get the expressions number of parameters.
num_variables	Get the expressions number of free variables.
parameters	Return the internal parameters dictionary.