Reading parquet files from multiple directories in Pyspark

Question

I need to read parquet files from multiple paths that are not parent or child directories.

for example,

dir1 ---
       |
       ------- dir1_1
            


        

Answer 1

Just taking John Conley's answer, and embellishing it a bit and providing the full code (used in Jupyter PySpark) as I found his answer extremely useful.

from hdfs import InsecureClient
client = InsecureClient('http://localhost:50070')

import posixpath as psp
fpaths = [
  psp.join("hdfs://localhost:9000" + dpath, fname)
  for dpath, _, fnames in client.walk('/eta/myHdfsPath')
  for fname in fnames
]
# At this point fpaths contains all hdfs files 

parquetFile = sqlContext.read.parquet(*fpaths)


import pandas
pdf = parquetFile.toPandas()
# display the contents nicely formatted.
pdf