polars-parquet-0.44.2
- polars-parquet 0.44.2
- Docs.rs crate page
- MIT AND Apache-2.0
- Links
- Homepage
- Repository
- crates.io
- Source
- Owners
- ritchie46
- Dependencies
- ahash >=0.8.5 normal
  
  polars-arrow ^0.44.2 normal
  
  async-stream ^0.3.3 normal optional
  
  base64 ^0.22.0 normal
  
  brotli ^6.0 normal optional
  
  bytemuck ^1.11 normal
  
  ethnum ^1.3.2 normal
  
  fallible-streaming-iterator ^0.1.9 normal optional
  
  flate2 ^1 normal optional
  
  futures ^0.3.25 normal optional
  
  hashbrown ^0.15.0 normal
  
  lz4 ^1.24 normal optional
  
  lz4_flex ^0.11 normal optional
  
  num-traits ^0.2 normal
  
  polars-compute ^0.44.2 normal
  
  polars-error ^0.44.2 normal
  
  polars-parquet-format ^0.1 normal
  
  polars-utils ^0.44.2 normal
  
  serde ^1.0.188 normal optional
  
  simdutf8 ^0.1.4 normal
  
  snap ^1.1 normal optional
  
  streaming-decompression ^0.1 normal
  
  xxhash-rust ^0.8 normal optional
  
  zstd ^0.13 normal optional
  
  rand ^0.8 dev
- Versions
- 47.86% of the crate is documented
Platform
- i686-unknown-linux-gnu
- x86_64-unknown-linux-gnu
Feature flags

Rust

polars_parquet0.44.2

In polars_parquet::arrow::read

polars_parquet::arrow::read

Function n_columns

pub fn n_columns(dtype: &ArrowDataType) -> usize

Expand description

Returns the number of (parquet) columns that a ArrowDataType contains.