remove unused memsize_to_str and minor cleanups [pr] (tinygrad#9211)

* fix edge cases in memsize_to_str()

Inputs <= 1 now return "0.00 B" for 0 and "1.00 B" for 1, avoiding an
IndexError. Also, memsize_to_str(1000) now returns "1.00 KB" instead of
"1000.00 B".

Replaced the list comprehension with a next(...) generator for conciseness
and efficiency.

* simplify code using idiomatic python

- Remove the unused `memsize_to_str()` function in helpers.
- Use a tuple for checking multiple string prefixes/suffixes.
- Avoid unnecessary list construction by using iterables directly.
- Check None in @diskcache to ensure proper caching of falsy values.

* revert generators back to list comprehension

Sometimes building list first could be faster. Keep it as is.

examples/llama3.py

@@ -47,7 +47,7 @@ def convert(name) -> Tensor:
     disk_tensors: List[Tensor] = [model[name] for model in models]
     if len(disk_tensors) == 1 or len(disk_tensors[0].shape) == 1:
       return disk_tensors[0].to(device=device)
-    axis = 1 if name.endswith(".attention.wo.weight") or name.endswith(".feed_forward.w2.weight") else 0
+    axis = 1 if name.endswith((".attention.wo.weight", ".feed_forward.w2.weight")) else 0
     lazy_tensors = [data.to(device=device) for data in disk_tensors]
     return lazy_tensors[0].cat(*lazy_tensors[1:], dim=axis)
   return {name: convert(name) for name in {name: None for model in models for name in model}}

tinygrad/helpers.py

@@ -27,7 +27,6 @@ def all_same(items:Union[tuple[T, ...], list[T]]): return all(x == items[0] for
 def all_int(t: Sequence[Any]) -> TypeGuard[tuple[int, ...]]: return all(isinstance(s, int) for s in t)
 def colored(st, color:Optional[str], background=False): return f"\u001b[{10*background+60*(color.upper() == color)+30+['black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white'].index(color.lower())}m{st}\u001b[0m" if color is not None else st  # replace the termcolor library with one line  # noqa: E501
 def colorize_float(x: float): return colored(f"{x:7.2f}x", 'green' if x < 0.75 else 'red' if x > 1.15 else 'yellow')
-def memsize_to_str(_bytes: int) -> str: return [f"{(_bytes / d):.2f} {pr}" for d,pr in [(1e9,"GB"),(1e6,"MB"),(1e3,"KB"),(1,"B")] if _bytes > d][0]
 def time_to_str(t:float, w=8) -> str: return next((f"{t * d:{w}.2f}{pr}" for d,pr in [(1, "s "),(1e3, "ms")] if t > 10/d), f"{t * 1e6:{w}.2f}us")
 def ansistrip(s:str): return re.sub('\x1b\\[(K|.*?m)', '', s)
 def ansilen(s:str): return len(ansistrip(s))
@@ -191,8 +190,7 @@ def diskcache_clear():
 def diskcache_get(table:str, key:Union[dict, str, int]) -> Any:
   if CACHELEVEL < 1: return None
   if isinstance(key, (str,int)): key = {"key": key}
-  conn = db_connection()
-  cur = conn.cursor()
+  cur = db_connection().cursor()
   try:
     res = cur.execute(f"SELECT val FROM '{table}_{VERSION}' WHERE {' AND '.join([f'{x}=?' for x in key.keys()])}", tuple(key.values()))
   except sqlite3.OperationalError:
@@ -211,15 +209,15 @@ def diskcache_put(table:str, key:Union[dict, str, int], val:Any, prepickled=Fals
     ltypes = ', '.join(f"{k} {TYPES[type(key[k])]}" for k in key.keys())
     cur.execute(f"CREATE TABLE IF NOT EXISTS '{table}_{VERSION}' ({ltypes}, val blob, PRIMARY KEY ({', '.join(key.keys())}))")
     _db_tables.add(table)
-  cur.execute(f"REPLACE INTO '{table}_{VERSION}' ({', '.join(key.keys())}, val) VALUES ({', '.join(['?']*len(key.keys()))}, ?)", tuple(key.values()) + (val if prepickled else pickle.dumps(val), ))  # noqa: E501
+  cur.execute(f"REPLACE INTO '{table}_{VERSION}' ({', '.join(key.keys())}, val) VALUES ({', '.join(['?']*len(key))}, ?)", tuple(key.values()) + (val if prepickled else pickle.dumps(val), ))  # noqa: E501
   conn.commit()
   cur.close()
   return val
 
 def diskcache(func):
   def wrapper(*args, **kwargs) -> bytes:
     table, key = f"cache_{func.__name__}", hashlib.sha256(pickle.dumps((args, kwargs))).hexdigest()
-    if (ret:=diskcache_get(table, key)): return ret
+    if (ret:=diskcache_get(table, key)) is not None: return ret
     return diskcache_put(table, key, func(*args, **kwargs))
   return wrapper
 

tinygrad/viz/serve.py

@@ -124,7 +124,7 @@ def do_GET(self):
       with open(os.path.join(os.path.dirname(__file__), "index.html"), "rb") as f: ret = f.read()
     elif (url:=urlparse(self.path)).path == "/profiler":
       with open(os.path.join(os.path.dirname(__file__), "perfetto.html"), "rb") as f: ret = f.read()
-    elif (self.path.startswith("/assets/") or self.path.startswith("/lib/")) and '/..' not in self.path:
+    elif self.path.startswith(("/assets/", "/lib/")) and '/..' not in self.path:
       try:
         with open(os.path.join(os.path.dirname(__file__), self.path.strip('/')), "rb") as f: ret = f.read()
         if url.path.endswith(".js"): content_type = "application/javascript"