python - How to read a list of parquet files from S3 as a pandas ...
import pyarrow.parquet as pq dataset = pq.ParquetDataset('parquet/') table = dataset.read() df = table.to_pandas() Both work like a charm. Now I want to achieve the same remotely with files …
Inspect Parquet from command line - Stack Overflow
How do I inspect the content of a Parquet file from the command line? The only option I see now is $ hadoop fs -get my-path local-file $ parquet-tools head local-file | less I would like to avoid
Unable to infer schema when loading Parquet file
The documentation for parquet says the format is self describing, and the full schema was available when the parquet file was saved. What gives? Using Spark 2.1.1. Also fails in 2.2.0. …
How can I write a parquet file using Spark (pyspark)?
I'm pretty new in Spark and I've been trying to convert a Dataframe to a parquet file in Spark but I haven't had success yet. The documentation says that I can use write.parquet function to …
How to read a Parquet file into Pandas DataFrame?
How to read a modestly sized Parquet data-set into an in-memory Pandas DataFrame without setting up a cluster computing infrastructure such as Hadoop or Spark? This is only a …
indexing - Index in Parquet - Stack Overflow
Basically Parquet has added two new structures in parquet layout - Column Index and Offset Index. Below is a more detailed technical explanation what it solves and how. Problem …
Using pyarrow how do you append to parquet file? - Stack Overflow
Generally speaking, Parquet datasets consist of multiple files, so you append by writing an additional file into the same directory where the data belongs to. It would be useful to have the …
How to view Apache Parquet file in Windows? - Stack Overflow
Jun 19, 2018 · 98 What is Apache Parquet? Apache Parquet is a binary file format that stores data in a columnar fashion. Data inside a Parquet file is similar to an RDBMS style table where …
What are the pros and cons of the Apache Parquet format …
Apr 24, 2016 · 30,36,2 Parquet files are most commonly compressed with the Snappy compression algorithm. Snappy compressed files are splittable and quick to inflate. Big data …
Methods for writing Parquet files using Python? - Stack Overflow
Oct 5, 2015 · I'm having trouble finding a library that allows Parquet files to be written using Python. Bonus points if I can use Snappy or a similar compression mechanism in conjunction …