```
S = [u'BIGSQL_WORKER', u'DATANODE', u'FLUME_HANDLER', u'HBASE_CLIENT', u'HBASE_REGIONSERVER', u'HCAT', u'HDFS_CLIENT', u'HIVE_CLIENT', u'MAPREDUCE2_CLIENT', u'NODEMANAGER', u'OOZIE_CLIENT', u'PIG', u'SLIDER', u'SOLR', u'SPARK_CLIENT', u'SQOOP', u'YARN_CLIENT', u'ZOOKEEPER_CLIENT', u'ZOOKEEPER_SERVER']

```

I want to remove the strings which have 'CLIENT' in them,

```
F = map(lambda x: x if 'CLIENT' not in x else None, S)
F = [u'BIGSQL_WORKER', u'DATANODE', u'FLUME_HANDLER', None, u'HBASE_REGIONSERVER', u'HCAT', None, None, None, u'NODEMANAGER', None, u'PIG', u'SLIDER', u'SOLR', None, u'SQOOP', None, None, u'ZOOKEEPER_SERVER']

```

I tried pass but did not work inside lambda, any idea ?