module Polars
module Polars::Catalog::Unity
module Polars::Convert
module Polars::ExprDispatch
module Polars::Functions
module Polars::IO
module Polars::Selectors
module Polars::Testing
module Polars::Utils
class Polars::Array
class Polars::ArrayExpr
class Polars::ArrayNameSpace
class Polars::ArrowArrayStream
class Polars::AssertionError
class Polars::BatchedCsvReader
class Polars::Binary
class Polars::BinaryExpr
class Polars::BinaryNameSpace
class Polars::Boolean
class Polars::CatExpr
class Polars::CatNameSpace
class Polars::Catalog
class Polars::Catalog::Unity::ColumnInfo
class Polars::Catalog::Unity::TableInfo
class Polars::Categorical
class Polars::Categories
class Polars::ChainedThen
class Polars::ChainedWhen
class Polars::CollectBatches
class Polars::ColumnNotFoundError
class Polars::ComputeError
class Polars::Config
class Polars::DataFrame
class Polars::DataFramePlot
class Polars::DataType
class Polars::DataTypeExpr
class Polars::DataTypeGroup
class Polars::Date
class Polars::DateTimeExpr
class Polars::DateTimeNameSpace
class Polars::Datetime
class Polars::Decimal
class Polars::DuplicateError
class Polars::Duration
class Polars::DynamicGroupBy
class Polars::Enum
class Polars::Error
class Polars::Expr
class Polars::ExtensionExpr
class Polars::ExtensionNameSpace
class Polars::Field
class Polars::Float16
class Polars::Float32
class Polars::Float64
class Polars::FloatType
class Polars::GroupBy
class Polars::IO::ScanOptions
class Polars::IO::SinkOptions
class Polars::IcebergDataset
class Polars::InProcessQuery
class Polars::Int128
class Polars::Int16
class Polars::Int32
class Polars::Int64
class Polars::Int8
class Polars::IntegerType
class Polars::InvalidOperationError
class Polars::LazyFrame
class Polars::LazyGroupBy
class Polars::List
class Polars::ListExpr
class Polars::ListNameSpace
class Polars::MetaExpr
class Polars::NameExpr
class Polars::NestedType
class Polars::NoDataError
class Polars::NoRowsReturned
class Polars::Null
class Polars::NumericType
class Polars::Object
class Polars::OutOfBoundsError
class Polars::PanicException
class Polars::QueryOptFlags
class Polars::RollingGroupBy
class Polars::RowsException
class Polars::SQLContext
class Polars::SQLInterfaceError
class Polars::SQLSyntaxError
class Polars::ScanCastOptions
class Polars::Schema
class Polars::SchemaError
class Polars::SchemaFieldNotFoundError
class Polars::Selector
class Polars::Series
class Polars::SeriesPlot
class Polars::ShapeError
class Polars::SignedIntegerType
class Polars::Slice
class Polars::String
class Polars::StringCache
class Polars::StringCacheMismatchError
class Polars::StringExpr
class Polars::StringNameSpace
class Polars::Struct
class Polars::StructExpr
class Polars::StructFieldNotFoundError
class Polars::StructNameSpace
class Polars::TemporalType
class Polars::Then
class Polars::Time
class Polars::Todo
class Polars::TooManyRowsReturned
class Polars::UInt128
class Polars::UInt16
class Polars::UInt32
class Polars::UInt64
class Polars::UInt8
class Polars::Unknown
class Polars::UnsignedIntegerType
class Polars::When
polars-df
0.25.1
# first
(LazyFrame)
def first slice(0, 1) end