This repository was archived by the owner on Dec 2, 2023. It is now read-only.
This repository was archived by the owner on Dec 2, 2023. It is now read-only.
NameError: name 'bi' is not defined #69
Description
The code that tangent writes tries to use an undefined variable
To replicate:
def foo(d, n):
S = np.zeros((n, n))
for i in range(n):
S[i, 2] = 1.
if i==2:
S[i, i] += d[i]
return S
g = tangent.grad(foo)Using tangent's verbose setting, the code generated is:
def dfoodd(d, n, bS=1.0):
# Initialize the tape
_stack = tangent.Stack()
d_i = None
t2 = None
t = n, n
S = np.zeros(t)
i2 = 0
for i in range(n):
_i = i
i2 += 1
tangent.push(_stack, t2, '_f906a3c2')
t2 = i, 2
tangent.push(_stack, S[t2], '_40e2ac70')
S[t2] = 1.0
cond = i == 2
if cond:
tangent.push(_stack, d_i, '_c9e01b45')
d_i = bi
t3 = i, i
S_t = S[t3]
tangent.push(_stack, S[t3], '_e70dae8e')
S[t3] = S_t + d_i
tangent.push(_stack, t3, '_e61bf5ac')
tangent.push(_stack, cond, '_60e612f2')
tangent.push(_stack, _i, '_eae234b4')
tangent.push(_stack, i2, '_f52e32af')
bd = tangent.init_grad(d)
bd_i = tangent.init_grad(d_i)
assert tangent.shapes_match(S, bS
), 'Shape mismatch between return value (%s) and seed derivative (%s)' % (
numpy.shape(S), numpy.shape(bS))
# Beginning of backward pass
i2 = tangent.pop(_stack, '_f52e32af')
for _ in range(i2):
i = tangent.pop(_stack, '_eae234b4')
cond = tangent.pop(_stack, '_60e612f2')
if cond:
# Grad of: S[t3] = S_t + d_i
t3 = tangent.pop(_stack, '_e61bf5ac')
_S = S[t3]
S[t3] = tangent.pop(_stack, '_e70dae8e')
_bd_i = tangent.unbroadcast(bS[t3], d_i)
bS[t3] = tangent.init_grad(S[t3], allow_lazy_initializer=True)
bd_i = tangent.add_grad(bd_i, _bd_i)
# Grad of: t2 = i, 2
_d_i = d_i
d_i = tangent.pop(_stack, '_c9e01b45')
_bd = bd_i
bd_i = tangent.init_grad(d_i, allow_lazy_initializer=True)
bd[i] = tangent.add_grad(bd[i], _bd)
S[t2] = tangent.pop(_stack, '_40e2ac70')
bS[t2] = tangent.init_grad(S[t2], allow_lazy_initializer=True)
t2 = tangent.pop(_stack, '_f906a3c2')
return bd