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[Type hint] scheduling ddim #343

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Merged
merged 2 commits into from
Sep 4, 2022
Merged

[Type hint] scheduling ddim #343

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[Type hint] scheduling ddim
santiviquez Sep 3, 2022
35cd6dd
apply suggestions from code review
santiviquez Sep 4, 2022
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29 changes: 17 additions & 12 deletions src/diffusers/schedulers/scheduling_ddim.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
# and https://github.com/hojonathanho/diffusion

import math
from typing import Union
from typing import Optional, Union

import numpy as np
import torch
Expand Down Expand Up @@ -52,15 +52,15 @@ class DDIMScheduler(SchedulerMixin, ConfigMixin):
@register_to_config
def __init__(
self,
num_train_timesteps=1000,
beta_start=0.0001,
beta_end=0.02,
beta_schedule="linear",
trained_betas=None,
timestep_values=None,
clip_sample=True,
set_alpha_to_one=True,
tensor_format="pt",
num_train_timesteps: int = 1000,
beta_start: float = 0.0001,
beta_end: float = 0.02,
beta_schedule: str = "linear",
trained_betas: Optional[np.ndarray] = None,
timestep_values: Optional[np.ndarray] = None,
clip_sample: bool = True,
set_alpha_to_one: bool = True,
tensor_format: str = "pt",
):

if beta_schedule == "linear":
Expand Down Expand Up @@ -100,7 +100,7 @@ def _get_variance(self, timestep, prev_timestep):

return variance

def set_timesteps(self, num_inference_steps, offset=0):
def set_timesteps(self, num_inference_steps: int, offset: int = 0):
self.num_inference_steps = num_inference_steps
self.timesteps = np.arange(
0, self.config.num_train_timesteps, self.config.num_train_timesteps // self.num_inference_steps
Expand Down Expand Up @@ -176,7 +176,12 @@ def step(

return {"prev_sample": prev_sample}

def add_noise(self, original_samples, noise, timesteps):
def add_noise(
self,
original_samples: Union[torch.FloatTensor, np.ndarray],
noise: Union[torch.FloatTensor, np.ndarray],
timesteps: Union[torch.IntTensor, np.ndarray],
) -> Union[torch.FloatTensor, np.ndarray]:
sqrt_alpha_prod = self.alphas_cumprod[timesteps] ** 0.5
sqrt_alpha_prod = self.match_shape(sqrt_alpha_prod, original_samples)
sqrt_one_minus_alpha_prod = (1 - self.alphas_cumprod[timesteps]) ** 0.5
Expand Down