file - What are the pros and cons of the Apache Parquet format …
Apr 24, 2016 · Parquet is a columnar file format, so Pandas can grab the columns relevant for the query and can skip the other columns. This is a massive performance improvement.
Reading / Fixing a corrupt parquet file - Stack Overflow
Sep 3, 2024 · Either the file is corrupted or this is not a parquet file. when I tried to construct a ParquetFile instance. I assume appending PAR1 to the end of the file could help this?
How to append new data to an existing parquet file?
Apr 27, 2023 · I have parquet files with some data in them. I want to add more data to them frequently every day. I want to do this without having to load the object to memory and then …
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 …
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 …
What file extension is the correct way to name parquet files?
Jun 3, 2025 · What is the correct way to name parquet files. If you were using gzip compression when creating the parquet file which would you use? file.parquet file.parquet.gzip (used by …
Python: save pandas data frame to parquet file - Stack Overflow
Jan 29, 2019 · Is it possible to save a pandas data frame directly to a parquet file? If not, what would be the suggested process? The aim is to be able to send the parquet file to another …
How to read partitioned parquet files from S3 using pyarrow in …
Jul 13, 2017 · For those of you who want to read in only parts of a partitioned parquet file, pyarrow accepts a list of keys as well as just the partial directory path to read in all parts of the partition.
How to view Apache Parquet file in Windows? - Stack Overflow
Jun 19, 2018 · I couldn't find any plain English explanations regarding Apache Parquet files. Such as: What are they? Do I need Hadoop or HDFS to view/create/store them? How can I create …
pandas df.to_parquet write to multiple smaller files
Sep 6, 2020 · Is it possible to use Pandas' DataFrame.to_parquet functionality to split writing into multiple files of some approximate desired size? I have a very large DataFrame (100M x 100), …