adding parity test file

Author: prishajain1

parity_ltx2_maxdiffusion.py

@@ -130,17 +130,19 @@ def main():
     pipe = LTX2Pipeline.from_pretrained(config)
 
     prompt = getattr(config, "prompt", "A man in a brightly lit room...")
-    # config can sometimes parse things as lists rather than strings if they contain commas
-    if isinstance(prompt, list):
-         prompt = " ".join([str(p) for p in prompt])
-    elif isinstance(prompt, tuple):
-         prompt = " ".join([str(p) for p in prompt])
+    if not isinstance(prompt, str):
+         if isinstance(prompt, (list, tuple)):
+              prompt = ", ".join(str(p) for p in prompt)
+         else:
+              prompt = str(prompt)
 
     negative_prompt = getattr(config, "negative_prompt", "shaky, glitchy, low quality...")
-    if isinstance(negative_prompt, list):
-         negative_prompt = " ".join([str(p) for p in negative_prompt])
-    elif isinstance(negative_prompt, tuple):
-         negative_prompt = " ".join([str(p) for p in negative_prompt])
+    if not isinstance(negative_prompt, str):
+         if isinstance(negative_prompt, (list, tuple)):
+              # Re-assemble commas if it was parsed as a list by commas 
+              negative_prompt = ", ".join(str(p) for p in negative_prompt)
+         else:
+              negative_prompt = str(negative_prompt)
     height = getattr(config, "height", 512)
     width = getattr(config, "width", 768)
     num_frames = getattr(config, "num_frames", 121)