code: def open_browser(url):
      """Open a web browser pointing to a given URL.
  
      We use this function instead of Python's `webbrowser` module because this
      way we can capture stdout/stderr to avoid polluting the terminal with the
      browser's messages. For example, Chrome always prints things like "Created
      new window in existing browser session", and those get on the user's way.
  
      url : str
          The URL. Must include the protocol.
  
      """
  
      # Treat Windows separately because:
      # 1. /dev/null doesn't exist.
      # 2. subprocess.Popen(['start', url]) doesn't actually pop up the
      #    browser even though 'start url' works from the command prompt.
      # Fun!
      # Also, use webbrowser if we are on Linux and xdg-open is not installed.
      #
      # We don't use the webbrowser module on Linux and Mac because some browsers
      # (ahem... Chrome) always print "Opening in existing browser session" to
      # the terminal, which is spammy and annoying. So instead we start the
      # browser ourselves and send all its output to /dev/null.
  
      if IS_WINDOWS:
          _open_browser_with_webbrowser(url)
          return
      if IS_LINUX_OR_BSD:
          if is_executable_in_path("xdg-open"):
              _open_browser_with_command("xdg-open", url)
              return
          _open_browser_with_webbrowser(url)
          return
      if IS_DARWIN:
          _open_browser_with_command("open", url)
          return
  
      import platform
  
      raise Error(
          'Cannot open browser in platform "%s"' % platform.system()
      )
  
file_path: dtale/dtale/env_util.py
imports: import os
  import platform
  import subprocess
label_desc: Use image node_id 4 for calling a global function with example usage: open_browser(url) without return types