feat(api): do not repeat wildcard values

api/onnx_web/diffusers/utils.py

@@ -3,6 +3,7 @@ from logging import getLogger
 from math import ceil
 from re import Pattern, compile
 from typing import Dict, List, Optional, Tuple
+from copy import deepcopy
 
 import numpy as np
 import torch
@@ -375,6 +376,8 @@ def replace_wildcards(prompt: str, seed: int, wildcards: Dict[str, List[str]]) -
     next_match = WILDCARD_TOKEN.search(prompt)
     remaining_prompt = prompt
 
+    # prep a local copy to avoid mutating the main one
+    wildcards = deepcopy(wildcards)
     random.seed(seed)
 
     while next_match is not None:
@@ -383,7 +386,7 @@ def replace_wildcards(prompt: str, seed: int, wildcards: Dict[str, List[str]]) -
 
         wildcard = ""
         if name in wildcards:
-            wildcard = random.choice(wildcards.get(name))
+            wildcard = pop_random(wildcards.get(name))
         else:
             logger.warning("unknown wildcard: %s", name)
 
@@ -395,3 +398,12 @@ def replace_wildcards(prompt: str, seed: int, wildcards: Dict[str, List[str]]) -
         next_match = WILDCARD_TOKEN.search(remaining_prompt)
 
     return remaining_prompt
+
+
+def pop_random(list: List[str]) -> str:
+    """
+    From https://stackoverflow.com/a/14088129
+    """
+    i = random.randrange(len(list))
+    list[i], list[-1] = list[-1], list[i]
+    return list.pop()