# Buggy code
def main():
    argument_spec = ec2_argument_spec()
    argument_spec.update(
        dict(
            mode=dict(choices=["push"], default="push"),
            file_change_strategy=dict(
                choices=["force", "date_size", "checksum"], default="date_size"
            ),
            bucket=dict(required=True),
            key_prefix=dict(required=False, default=""),
            file_root=dict(required=True, type="path"),
            permission=dict(
                required=False,
                choices=[
                    "private",
                    "public-read",
                    "public-read-write",
                    "authenticated-read",
                    "aws-exec-read",
                    "bucket-owner-read",
                    "bucket-owner-full-control",
                ],
            ),
            retries=dict(required=False),
            mime_map=dict(required=False, type="dict"),
            exclude=dict(required=False, default=".*"),
            include=dict(required=False, default="*"),
            cache_control=dict(required=False, default=""),
            # future options: encoding, metadata, storage_class, retries
        )
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
    )
    if not HAS_BOTO3:
        module.fail_json(msg="boto3 required for this module")

    result = {}
    mode = module.params["mode"]

    region, ec2_url, aws_connect_kwargs = (
        ansible.module_utils.ec2.get_aws_connection_info(module, boto3=True)
    )
    if not region:
        module.fail_json(msg="Region must be specified")
    s3 = ansible.module_utils.ec2.boto3_conn(
        module,
        conn_type="client",
        resource="s3",
        region=region,
        endpoint=ec2_url,
        **aws_connect_kwargs,
    )

    if mode == "push":
        try:
            result["filelist_initial"] = gather_files(
                module.params["file_root"],
                exclude=module.params["exclude"],
                include=module.params["include"],
            )
            result["filelist_typed"] = determine_mimetypes(
                result["filelist_initial"], module.params.get("mime_map")
            )
            result["filelist_s3"] = calculate_s3_path(
                result["filelist_typed"], module.params["key_prefix"]
            )
            result["filelist_local_etag"] = calculate_local_etag(result["filelist_s3"])
            result["filelist_actionable"] = filter_list(
                s3,
                module.params["bucket"],
                result["filelist_local_etag"],
                module.params["file_change_strategy"],
            )
            result["uploads"] = upload_files(
                s3,
                module.params["bucket"],
                result["filelist_actionable"],
                module.params,
            )

            # mark changed if we actually upload something.
            if result.get("uploads") and len(result.get("uploads")):
                result["changed"] = True
            # result.update(filelist=actionable_filelist)
        except botocore.exceptions.ClientError as err:
            error_msg = boto_exception(err)
            module.fail_json(
                msg=error_msg,
                exception=traceback.format_exc(),
                **camel_dict_to_snake_dict(err.response),
            )

    module.exit_json(**result)


# Traceback (AttributeError)
The full traceback is:
Traceback (most recent call last):
File "/tmp/ansible_ErsaeU/ansible_module_s3_sync.py", line 495, in <module>
main()
File "/tmp/ansible_ErsaeU/ansible_module_s3_sync.py", line 470, in main
except botocore.exceptions.NoCredentialsError as e:
AttributeError: 'module' object has no attribute 'exceptions'

failed: [localhost] (item=app/css) => {
"failed": true,
"item": "app/css",
"module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_ErsaeU/ansible_module_s3_sync.py\", line 495, in <module>\n    main()\n  File \"/tmp/ansible_ErsaeU/ansible_module_s3_sync.py\", line 470, in main\n    except botocore.exceptions.NoCredentialsError as e:\nAttributeError: 'module' object has no attribute 'exceptions'\n",
"module_stdout": "",
"msg": "MODULE FAILURE",
"rc": 0
}

# Fixed code
def main():
    argument_spec = ec2_argument_spec()
    argument_spec.update(
        dict(
            mode=dict(choices=["push"], default="push"),
            file_change_strategy=dict(
                choices=["force", "date_size", "checksum"], default="date_size"
            ),
            bucket=dict(required=True),
            key_prefix=dict(required=False, default=""),
            file_root=dict(required=True, type="path"),
            permission=dict(
                required=False,
                choices=[
                    "private",
                    "public-read",
                    "public-read-write",
                    "authenticated-read",
                    "aws-exec-read",
                    "bucket-owner-read",
                    "bucket-owner-full-control",
                ],
            ),
            retries=dict(required=False),
            mime_map=dict(required=False, type="dict"),
            exclude=dict(required=False, default=".*"),
            include=dict(required=False, default="*"),
            cache_control=dict(required=False, default=""),
            # future options: encoding, metadata, storage_class, retries
        )
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
    )
    if not HAS_BOTO3:
        module.fail_json(msg="boto3 required for this module")

    result = {}
    mode = module.params["mode"]

    region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module, boto3=True)
    if not region:
        module.fail_json(msg="Region must be specified")
    s3 = boto3_conn(
        module,
        conn_type="client",
        resource="s3",
        region=region,
        endpoint=ec2_url,
        **aws_connect_kwargs,
    )

    if mode == "push":
        try:
            result["filelist_initial"] = gather_files(
                module.params["file_root"],
                exclude=module.params["exclude"],
                include=module.params["include"],
            )
            result["filelist_typed"] = determine_mimetypes(
                result["filelist_initial"], module.params.get("mime_map")
            )
            result["filelist_s3"] = calculate_s3_path(
                result["filelist_typed"], module.params["key_prefix"]
            )
            result["filelist_local_etag"] = calculate_local_etag(result["filelist_s3"])
            result["filelist_actionable"] = filter_list(
                s3,
                module.params["bucket"],
                result["filelist_local_etag"],
                module.params["file_change_strategy"],
            )
            result["uploads"] = upload_files(
                s3,
                module.params["bucket"],
                result["filelist_actionable"],
                module.params,
            )

            # mark changed if we actually upload something.
            if result.get("uploads") and len(result.get("uploads")):
                result["changed"] = True
            # result.update(filelist=actionable_filelist)
        except botocore.exceptions.ClientError as err:
            error_msg = boto_exception(err)
            module.fail_json(
                msg=error_msg,
                exception=traceback.format_exc(),
                **camel_dict_to_snake_dict(err.response),
            )

    module.exit_json(**result)