Struct pyo3::types::PyString

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pub struct PyString(/* private fields */);
Expand description

Represents a Python string (a Unicode string object).

This type is only seen inside PyO3’s smart pointers as Py<PyString>, [Bound<'py, PyString>], and [Borrowed<'a, 'py, PyString>].

All functionality on this type is implemented through the PyStringMethods trait.

§Equality

For convenience, [Bound<'py, PyString>] implements PartialEq<str> to allow comparing the data in the Python string to a Rust UTF-8 string slice.

This is not always the most appropriate way to compare Python strings, as Python string subclasses may have different equality semantics. In situations where subclasses overriding equality might be relevant, use PyAnyMethods::eq, at cost of the additional overhead of a Python method call.

use pyo3::types::PyString;

let py_string = PyString::new_bound(py, "foo");
// via PartialEq<str>
assert_eq!(py_string, "foo");

// via Python equality
assert!(py_string.as_any().eq("foo").unwrap());

Implementations§

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impl PyString

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pub fn new_bound<'py>(py: Python<'py>, s: &str) -> Bound<'py, PyString>

Creates a new Python string object.

Panics if out of memory.

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pub fn intern_bound<'py>(py: Python<'py>, s: &str) -> Bound<'py, PyString>

Intern the given string

This will return a reference to the same Python string object if called repeatedly with the same string.

Note that while this is more memory efficient than PyString::new_bound, it unconditionally allocates a temporary Python string object and is thereby slower than PyString::new_bound.

Panics if out of memory.

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pub fn from_object_bound<'py>( src: &Bound<'py, PyAny>, encoding: &str, errors: &str, ) -> PyResult<Bound<'py, PyString>>

Attempts to create a Python string from a Python bytes-like object.

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impl AsPyPointer for PyString

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fn as_ptr(&self) -> *mut PyObject

Gets the underlying FFI pointer, returns a borrowed pointer.

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impl AsRef<PyAny> for PyString

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fn as_ref(&self) -> &PyAny

Converts this type into a shared reference of the (usually inferred) input type.
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impl Deref for PyString

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type Target = PyAny

The resulting type after dereferencing.
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fn deref(&self) -> &PyAny

Dereferences the value.
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impl PyTypeInfo for PyString

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const NAME: &'static str = "PyString"

Class name.
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const MODULE: Option<&'static str> = _

Module name, if any.
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fn type_object_raw(py: Python<'_>) -> *mut PyTypeObject

Returns the PyTypeObject instance for this type.
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fn is_type_of_bound(obj: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type or a subclass of this type.
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fn type_object_bound(py: Python<'_>) -> Bound<'_, PyType>

Returns the safe abstraction over the type object.
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fn is_exact_type_of_bound(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type.
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impl DerefToPyAny for PyString

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Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> PyTypeCheck for T
where T: PyTypeInfo,

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const NAME: &'static str = const NAME: &'static str = <T as PyTypeInfo>::NAME;

Name of self. This is used in error messages, for example.
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fn type_check(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of Self, which may include a subtype. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.