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utils.py
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utils.py
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from parser import (
Elements,
Element,
Vec,
Vectors,
)
"""Module corresponds to some utilities that enable the interpretation
of linear algebra expressions by converting the matrix and vector AST nodes
into Python arrays."""
def get_vector_elements(ast):
"""given an AST it takes the elements of a vector and puts them in a list."""
elements = []
while ast is not None:
if isinstance(ast, Elements):
elements.append(ast.e1)
ast = ast.elements
else:
elements.append(ast.exp)
ast = None
return elements
def get_matrix_elements(ast):
"""given an AST take the elements and put them on a 2D list."""
matrix = []
if isinstance(ast, Vectors):
matrix.extend(get_matrix_elements(ast.exp))
matrix.extend(get_matrix_elements(ast.expressions))
elif isinstance(ast, Elements):
vector_entries = get_vector_elements(ast)
matrix.append(vector_entries)
elif isinstance(ast, Vec):
vector_entries = get_vector_elements(ast.elements)
matrix.append(vector_entries)
else:
print("no more instances")
return matrix