Fix code to pass len-as-condition pylint test
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 0f31119..d1477fb 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1482,7 +1482,7 @@
       A ServerCredentials for use with an SSL-enabled Server. Typically, this
       object is an argument to add_secure_port() method during server setup.
     """
-    if len(private_key_certificate_chain_pairs) == 0:
+    if not private_key_certificate_chain_pairs:
         raise ValueError(
             'At least one private key-certificate chain pair is required!')
     elif require_client_auth and root_certificates is None:
@@ -1512,15 +1512,15 @@
       A ServerCertificateConfiguration that can be returned in the certificate
         configuration fetching callback.
     """
-    if len(private_key_certificate_chain_pairs) == 0:
-        raise ValueError(
-            'At least one private key-certificate chain pair is required!')
-    else:
+    if private_key_certificate_chain_pairs:
         return ServerCertificateConfiguration(
             _cygrpc.server_certificate_config_ssl(root_certificates, [
                 _cygrpc.SslPemKeyCertPair(key, pem)
                 for key, pem in private_key_certificate_chain_pairs
             ]))
+    else:
+        raise ValueError(
+            'At least one private key-certificate chain pair is required!')
 
 
 def dynamic_ssl_server_credentials(initial_certificate_configuration,