ultralytics 8.3.8 replace contextlib with try for speed (#16782)

Signed-off-by: UltralyticsAssistant <web@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

ultralytics/utils/checks.py

@@ -1,6 +1,5 @@
 # Ultralytics YOLO 🚀, AGPL-3.0 license
 
-import contextlib
 import glob
 import inspect
 import math
@@ -271,11 +270,13 @@ def check_latest_pypi_version(package_name="ultralytics"):
     Returns:
         (str): The latest version of the package.
     """
-    with contextlib.suppress(Exception):
+    try:
         requests.packages.urllib3.disable_warnings()  # Disable the InsecureRequestWarning
         response = requests.get(f"https://pypi.org/pypi/{package_name}/json", timeout=3)
         if response.status_code == 200:
             return response.json()["info"]["version"]
+    except:  # noqa E722
+        return None
 
 
 def check_pip_update_available():
@@ -286,7 +287,7 @@ def check_pip_update_available():
         (bool): True if an update is available, False otherwise.
     """
     if ONLINE and IS_PIP_PACKAGE:
-        with contextlib.suppress(Exception):
+        try:
             from ultralytics import __version__
 
             latest = check_latest_pypi_version()
@@ -296,6 +297,8 @@ def check_pip_update_available():
                     f"Update with 'pip install -U ultralytics'"
                 )
                 return True
+        except:  # noqa E722
+            pass
     return False
 
 
@@ -577,10 +580,12 @@ def check_yolo(verbose=True, device=""):
         ram = psutil.virtual_memory().total
         total, used, free = shutil.disk_usage("/")
         s = f"({os.cpu_count()} CPUs, {ram / gib:.1f} GB RAM, {(total - free) / gib:.1f}/{total / gib:.1f} GB disk)"
-        with contextlib.suppress(Exception):  # clear display if ipython is installed
+        try:
             from IPython import display
 
-            display.clear_output()
+            display.clear_output()  # clear display if notebook
+        except ImportError:
+            pass
     else:
         s = ""
 
@@ -707,9 +712,10 @@ def check_amp(model):
 
 def git_describe(path=ROOT):  # path must be a directory
     """Return human-readable git description, i.e. v5.0-5-g3e25f1e https://git-scm.com/docs/git-describe."""
-    with contextlib.suppress(Exception):
+    try:
         return subprocess.check_output(f"git -C {path} describe --tags --long --always", shell=True).decode()[:-1]
-    return ""
+    except:  # noqa E722
+        return ""
 
 
 def print_args(args: Optional[dict] = None, show_file=True, show_func=False):