examples: replace packaging.version with stdlib tuple comparison

Removes the third-party `packaging` dependency from all example scripts.
The upstream master branch has no such requirement, and the version
checks only need simple numeric comparisons that a split+tuple handles cleanly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

examples/hello_world.py

@@ -12,7 +12,6 @@
 
 from cefpython3 import cefpython as cef
 import platform
-from packaging.version import Version as parse_version
 
 
 def main():
@@ -34,7 +33,7 @@ def check_versions():
     print("[hello_world.py] Python {ver} {arch}".format(
            ver=platform.python_version(),
            arch=platform.architecture()[0]))
-    assert parse_version(cef.__version__) >= parse_version("57.0"), \
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (57, 0), \
         "CEF Python v57.0+ required to run this"
 
 

examples/pywin32.py

@@ -16,7 +16,6 @@
 from cefpython3 import cefpython as cef
 
 import distutils.sysconfig
-from packaging.version import Version as parse_version
 import math
 import os
 import platform
@@ -109,7 +108,7 @@ def check_versions():
         pywin32_version = fp.read().strip()
     print("[pywin32.py] pywin32 {ver}".format(ver=pywin32_version))
 
-    assert parse_version(cef.__version__) >= parse_version("57.0"), "CEF Python v57.0+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (57, 0), "CEF Python v57.0+ required to run this"
 
 
 def create_browser(window_info, settings, url):

examples/qt.py

@@ -12,7 +12,6 @@
 import platform
 import subprocess
 import sys
-from packaging.version import Version as parse_version
 
 # GLOBALS
 PYQT5 = False
@@ -140,7 +139,7 @@ def check_versions():
         print("[qt.py] PySide6 {v1} (qt {v2})".format(
               v1=PySide6.__version__, v2=QtCore.__version__))
     # CEF Python version requirement
-    assert parse_version(cef.__version__) >= parse_version("55.4"), "CEF Python v55.4+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (55, 4), "CEF Python v55.4+ required to run this"
 
 
 class MainWindow(QMainWindow):

examples/screenshot.py

@@ -36,7 +36,6 @@
 """
 
 from cefpython3 import cefpython as cef
-from packaging.version import Version as parse_version
 import os
 import platform
 import subprocess
@@ -115,7 +114,7 @@ def check_versions():
            ver=platform.python_version(),
            arch=platform.architecture()[0]))
     print("[screenshot.py] Pillow {ver}".format(ver=PILLOW_VERSION))
-    assert parse_version(cef.__version__) >= parse_version("57.0"), "CEF Python v57.0+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (57, 0), "CEF Python v57.0+ required to run this"
 
 
 def command_line_arguments():

examples/tkinter_.py

@@ -26,7 +26,6 @@
 import os
 import platform
 import logging as _logging
-from packaging.version import Version as parse_version
 
 # Fix for PyCharm hints warnings
 WindowUtils = cef.WindowUtils()
@@ -54,7 +53,7 @@ def main():
     logger.info("Python {ver} {arch}".format(
             ver=platform.python_version(), arch=platform.architecture()[0]))
     logger.info("Tk {ver}".format(ver=tk.Tcl().eval('info patchlevel')))
-    assert parse_version(cef.__version__) >= parse_version("55.3"), "CEF Python v55.3+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (55, 3), "CEF Python v55.3+ required to run this"
     sys.excepthook = cef.ExceptHook  # To shutdown all CEF processes on error
     # Tk must be initialized before CEF otherwise fatal error (Issue #306)
     root = tk.Tk()

examples/tutorial.py

@@ -6,7 +6,6 @@
 import platform
 import sys
 import threading
-from packaging.version import Version as parse_version
 
 # HTML code. Browser will navigate to a Data uri created
 # from this html code.
@@ -86,7 +85,7 @@ def check_versions():
     print("[tutorial.py] Python {ver} {arch}".format(
            ver=platform.python_version(),
            arch=platform.architecture()[0]))
-    assert parse_version(cef.__version__) >= parse_version("57.0"), "CEF Python v57.0+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (57, 0), "CEF Python v57.0+ required to run this"
 
 
 def html_to_data_uri(html, js_callback=None):

examples/wxpython.py

@@ -12,7 +12,6 @@
 import platform
 import sys
 import os
-from packaging.version import Version as parse_version
 
 # Platforms
 WINDOWS = (platform.system() == "Windows")
@@ -63,7 +62,7 @@ def check_versions():
             ver=platform.python_version(), arch=platform.architecture()[0]))
     print("[wxpython.py] wxPython {ver}".format(ver=wx.version()))
     # CEF Python version requirement
-    assert parse_version(cef.__version__) >= parse_version("66.0"), "CEF Python v66.0+ required to run this"
+    assert tuple(int(x) for x in cef.__version__.split(".")) >= (66, 0), "CEF Python v66.0+ required to run this"
 
 
 def scale_window_size_for_high_dpi(width, height):