Late-import scipy.integrate (only required when using LinearMultistep…

…Sampler)

sgm/modules/diffusionmodules/sampling_utils.py

@@ -1,5 +1,4 @@
 import torch
-from scipy import integrate
 
 from ...util import append_dims
 
@@ -10,6 +9,7 @@ def __call__(self, uncond, cond, scale):
 
 
 def linear_multistep_coeff(order, t, i, j, epsrel=1e-4):
+    from scipy import integrate  # late import to avoid extra dependency
     if order - 1 > i:
         raise ValueError(f"Order {order} too high for step {i}")