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.

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 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 moderate amount of dat...

Jun 19, 2018 · No. Parquet files can be stored in any file system, not just HDFS. As mentioned above it is a file format. So it's just like any other file where it has a name and a .parquet extension. What will …

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 concatenate and …

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 creating …

Dec 9, 2016 · 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 team, which they …

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.

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 pandas …

Aug 5, 2018 · 39 I am new to python and I have a scenario where there are multiple parquet files with file names in order. ex: par_file1,par_file2,par_file3 and so on upto 100 files in a folder. I need to …