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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 env(client, paths, opt):
 """Renders a shell snippet based on paths in a Secretfile"""

    old_prefix = False
    old_prefix = opt.prefix and not (opt.add_prefix or
                                     opt.add_suffix or
                                     not opt.merge_path)
    if old_prefix:
        LOG.warning("the prefix option is deprecated "
                    "please use"
                    "--no-merge-path --add-prefix $OLDPREFIX_ instead")
    elif opt.prefix:
        LOG.warning("the prefix option is deprecated"
                    "please use"
                    "--no-merge-path --add-prefix $OLDPREFIX_ instead")
    key_map = cli_hash(opt.key_map)
    for path in paths:
        secrets = client.read(path)
        if secrets and 'data' in secrets:
            if is_aws(secrets['data']) and 'sts' not in path:
                renew_secret(client, secrets, opt)

            for s_key, s_val in secrets['data'].items():
                o_key = s_key
                if s_key in key_map:
                    o_key = key_map[s_key]

                # see https://github.com/Autodesk/aomi/issues/40
                env_name = None
                if old_prefix:
                    env_name = ("%s_%s" % (opt.prefix, o_key)).upper()
                else:
                    env_name = secret_key_name(path, o_key, opt).upper()

                print("%s=\"%s\"" % (env_name, s_val))
                if opt.export:
                    print("export %s" % env_name)