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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _GetProxies(self):
 """Gather a list of proxies to use."""

    # Detect proxies from the OS environment.
    result = client_utils.FindProxies()

    # Also try to connect directly if all proxies fail.
    result.append("")

    # Also try all proxies configured in the config system.
    result.extend(config.CONFIG["Client.proxy_servers"])

    return result