polars_io::csv::read

Enum NullValues

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pub enum NullValues {
    AllColumnsSingle(PlSmallStr),
    AllColumns(Vec<PlSmallStr>),
    Named(Vec<(PlSmallStr, PlSmallStr)>),
}
Available on crate features csv or json only.

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AllColumnsSingle(PlSmallStr)

A single value that’s used for all columns

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AllColumns(Vec<PlSmallStr>)

Multiple values that are used for all columns

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Named(Vec<(PlSmallStr, PlSmallStr)>)

Tuples that map column names to null value of that column

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impl NullValues

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pub fn compile(self, schema: &Schema) -> PolarsResult<NullValuesCompiled>

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impl Clone for NullValues

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fn clone(&self) -> NullValues

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for NullValues

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for NullValues

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for NullValues

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for NullValues

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fn eq(&self, other: &NullValues) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for NullValues

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for NullValues

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impl StructuralPartialEq for NullValues

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impl<T> Any for T
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Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn __clone_box(&self, _: Private) -> *mut ()

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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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