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improve readability #48

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improve readability #48

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4 changes: 3 additions & 1 deletion micrograd/engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ def __pow__(self, other):

def _backward():
self.grad += (other * self.data**(other-1)) * out.grad

out._backward = _backward

return out
Expand All @@ -52,16 +53,17 @@ def _backward():
return out

def backward(self):

# topological order all of the children in the graph
topo = []
visited = set()

def build_topo(v):
if v not in visited:
visited.add(v)
for child in v._prev:
build_topo(child)
topo.append(v)

build_topo(self)

# go one variable at a time and apply the chain rule to get its gradient
Expand Down