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Speedup import time with lazy import of scipy.stats #1268

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merged 1 commit into from
Mar 11, 2025
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Speedup import time with lazy import of scipy.stats #1268

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9 changes: 8 additions & 1 deletion pytensor/tensor/random/basic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@
from typing import Literal

import numpy as np
import scipy.stats as stats
from numpy import broadcast_shapes as np_broadcast_shapes
from numpy import einsum as np_einsum
from numpy import sqrt as np_sqrt
Expand All @@ -21,6 +20,11 @@
)


# Scipy.stats is considerably slow to import
# We import scipy.stats lazily inside `ScipyRandomVariable`
stats = None


try:
broadcast_shapes = np.broadcast_shapes
except AttributeError:
Expand Down Expand Up @@ -57,6 +61,9 @@ def rng_fn_scipy(cls, rng, *args, **kwargs):

@classmethod
def rng_fn(cls, *args, **kwargs):
global stats
if stats is None:
import scipy.stats as stats
size = args[-1]
res = cls.rng_fn_scipy(*args, **kwargs)

Expand Down