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//! .npz examples. | ||
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use ndarray::{array, Array2}; | ||
use ndarray_npy::{NpzReader, NpzWriter}; | ||
use std::{error::Error, io::Cursor}; | ||
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#[test] | ||
fn round_trip_npz() -> Result<(), Box<dyn Error>> { | ||
let mut buf = Vec::<u8>::new(); | ||
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let arr1 = array![[1i32, 3, 0], [4, 7, -1]]; | ||
let arr2 = array![[9i32, 6], [-5, 2], [3, -1]]; | ||
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{ | ||
let mut writer = NpzWriter::new(Cursor::new(&mut buf)); | ||
writer.add_array("arr1", &arr1)?; | ||
writer.add_array("arr2", &arr2)?; | ||
} | ||
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{ | ||
let mut reader = NpzReader::new(Cursor::new(&buf))?; | ||
assert!(!reader.is_empty()); | ||
assert_eq!(reader.len(), 2); | ||
assert_eq!( | ||
reader.names()?, | ||
vec!["arr1".to_string(), "arr2".to_string()], | ||
); | ||
{ | ||
let by_name: Array2<i32> = reader.by_name("arr1")?; | ||
assert_eq!(by_name, arr1); | ||
} | ||
{ | ||
let by_name: Array2<i32> = reader.by_name("arr1.npy")?; | ||
assert_eq!(by_name, arr1); | ||
} | ||
{ | ||
let by_name: Array2<i32> = reader.by_name("arr2")?; | ||
assert_eq!(by_name, arr2); | ||
} | ||
{ | ||
let by_name: Array2<i32> = reader.by_name("arr2.npy")?; | ||
assert_eq!(by_name, arr2); | ||
} | ||
{ | ||
let res: Result<Array2<i32>, _> = reader.by_name("arr1.npy.npy"); | ||
assert!(res.is_err()); | ||
} | ||
} | ||
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Ok(()) | ||
} |