Colab and Kaggle loggers removeHandler (#8985)

Resolve duplicate outputs in colab. Also optimizes Colab and Kaggle environment checks.

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

utils/general.py

@@ -56,13 +56,35 @@ os.environ['NUMEXPR_MAX_THREADS'] = str(NUM_THREADS)  # NumExpr max threads
 os.environ['OMP_NUM_THREADS'] = '1' if platform.system() == 'darwin' else str(NUM_THREADS)  # OpenMP (PyTorch and SciPy)
 
 
+def is_ascii(s=''):
+    # Is string composed of all ASCII (no UTF) characters? (note str().isascii() introduced in python 3.7)
+    s = str(s)  # convert list, tuple, None, etc. to str
+    return len(s.encode().decode('ascii', 'ignore')) == len(s)
+
+
+def is_chinese(s='人工智能'):
+    # Is string composed of any Chinese characters?
+    return bool(re.search('[\u4e00-\u9fff]', str(s)))
+
+
+def is_colab():
+    # Is environment a Google Colab instance?
+    return 'COLAB_GPU' in os.environ
+
+
 def is_kaggle():
     # Is environment a Kaggle Notebook?
-    try:
-        assert os.environ.get('PWD') == '/kaggle/working'
-        assert os.environ.get('KAGGLE_URL_BASE') == 'https://www.kaggle.com'
+    return os.environ.get('PWD') == '/kaggle/working' and os.environ.get('KAGGLE_URL_BASE') == 'https://www.kaggle.com'
+
+
+def is_docker() -> bool:
+    """Check if the process runs inside a docker container."""
+    if Path("/.dockerenv").exists():
         return True
-    except AssertionError:
+    try:  # check if docker is in control groups
+        with open("/proc/self/cgroup") as file:
+            return any("docker" in line for line in file)
+    except OSError:
         return False
 
 
@@ -82,7 +104,7 @@ def is_writeable(dir, test=False):
 
 def set_logging(name=None, verbose=VERBOSE):
     # Sets level and returns logger
-    if is_kaggle():
+    if is_kaggle() or is_colab():
         for h in logging.root.handlers:
             logging.root.removeHandler(h)  # remove all handlers associated with the root logger object
     rank = int(os.getenv('RANK', -1))  # rank in world for Multi-GPU trainings
@@ -228,42 +250,6 @@ def get_latest_run(search_dir='.'):
     return max(last_list, key=os.path.getctime) if last_list else ''
 
 
-def is_docker() -> bool:
-    """Check if the process runs inside a docker container."""
-    if Path("/.dockerenv").exists():
-        return True
-    try:  # check if docker is in control groups
-        with open("/proc/self/cgroup") as file:
-            return any("docker" in line for line in file)
-    except OSError:
-        return False
-
-
-def is_colab():
-    # Is environment a Google Colab instance?
-    try:
-        import google.colab
-        return True
-    except ImportError:
-        return False
-
-
-def is_pip():
-    # Is file in a pip package?
-    return 'site-packages' in Path(__file__).resolve().parts
-
-
-def is_ascii(s=''):
-    # Is string composed of all ASCII (no UTF) characters? (note str().isascii() introduced in python 3.7)
-    s = str(s)  # convert list, tuple, None, etc. to str
-    return len(s.encode().decode('ascii', 'ignore')) == len(s)
-
-
-def is_chinese(s='人工智能'):
-    # Is string composed of any Chinese characters?
-    return bool(re.search('[\u4e00-\u9fff]', str(s)))
-
-
 def emojis(str=''):
     # Return platform-dependent emoji-safe version of string
     return str.encode().decode('ascii', 'ignore') if platform.system() == 'Windows' else str