title: How to check a file/folder is present using pyspark without getting exception
body: <p>I am trying to keep a check for the file whether it is present or not before reading it from my pyspark in databricks to avoid exceptions? I tried below code snippets but i am getting exception when file is not present</p>
  
  <pre><code>from pyspark.sql import *
  from pyspark.conf import SparkConf
  SparkSession.builder.config(conf=SparkConf())
  try:
      df = sqlContext.read.format('com.databricks.spark.csv').option("delimiter",",").options(header='true', inferschema='true').load('/FileStore/tables/HealthCareSample_dumm.csv')
      print("File Exists")
  except IOError:
      print("file not found")`
  </code></pre>
  
  <p>When i have file, it reads file and "prints File Exists" but when the file is not there it will throw "AnalysisException: 'Path does not exist: dbfs:/FileStore/tables/HealthCareSample_dumm.csv;'"</p>