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User Guide
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Input/output
polars.read_csv
polars.read_csv_batched
polars.scan_csv
polars.DataFrame.write_csv
polars.read_ipc
polars.scan_ipc
polars.read_ipc_schema
polars.DataFrame.write_ipc
polars.read_parquet
polars.scan_parquet
polars.read_parquet_schema
polars.DataFrame.write_parquet
polars.read_database
polars.DataFrame.write_database
polars.read_json
polars.read_ndjson
polars.scan_ndjson
polars.DataFrame.write_json
polars.DataFrame.write_ndjson
polars.read_avro
polars.DataFrame.write_avro
polars.read_excel
polars.DataFrame.write_excel
polars.scan_delta
polars.read_delta
polars.scan_pyarrow_dataset
polars.io.csv.batched_reader.BatchedCsvReader.next_batches
Series
Aggregation
polars.Series.arg_max
polars.Series.arg_min
polars.Series.max
polars.Series.mean
polars.Series.median
polars.Series.min
polars.Series.mode
polars.Series.nan_max
polars.Series.nan_min
polars.Series.product
polars.Series.quantile
polars.Series.std
polars.Series.sum
polars.Series.var
Attributes
polars.Series.arr
polars.Series.cat
polars.Series.dt
polars.Series.dtype
polars.Series.inner_dtype
polars.Series.name
polars.Series.shape
polars.Series.str
polars.Series.time_unit
polars.Series.flags
Binary
polars.Series.bin.contains
polars.Series.bin.decode
polars.Series.bin.encode
polars.Series.bin.ends_with
polars.Series.bin.starts_with
Boolean
polars.Series.all
polars.Series.any
Categories
polars.Series.cat.set_ordering
Computation
polars.Series.abs
polars.Series.arccos
polars.Series.arccosh
polars.Series.arcsin
polars.Series.arcsinh
polars.Series.arctan
polars.Series.arctanh
polars.Series.arg_true
polars.Series.arg_unique
polars.Series.cos
polars.Series.cosh
polars.Series.cummax
polars.Series.cummin
polars.Series.cumprod
polars.Series.cumsum
polars.Series.cumulative_eval
polars.Series.diff
polars.Series.dot
polars.Series.entropy
polars.Series.ewm_mean
polars.Series.ewm_std
polars.Series.ewm_var
polars.Series.exp
polars.Series.hash
polars.Series.is_between
polars.Series.kurtosis
polars.Series.log
polars.Series.log10
polars.Series.map_dict
polars.Series.pct_change
polars.Series.peak_max
polars.Series.peak_min
polars.Series.rank
polars.Series.rolling_apply
polars.Series.rolling_max
polars.Series.rolling_mean
polars.Series.rolling_median
polars.Series.rolling_min
polars.Series.rolling_quantile
polars.Series.rolling_skew
polars.Series.rolling_std
polars.Series.rolling_sum
polars.Series.rolling_var
polars.Series.search_sorted
polars.Series.sign
polars.Series.sin
polars.Series.sinh
polars.Series.skew
polars.Series.sqrt
polars.Series.tan
polars.Series.tanh
Descriptive
polars.Series.chunk_lengths
polars.Series.describe
polars.Series.estimated_size
polars.Series.has_validity
polars.Series.is_boolean
polars.Series.is_duplicated
polars.Series.is_empty
polars.Series.is_finite
polars.Series.is_first
polars.Series.is_float
polars.Series.is_in
polars.Series.is_infinite
polars.Series.is_nan
polars.Series.is_not_nan
polars.Series.is_not_null
polars.Series.is_null
polars.Series.is_numeric
polars.Series.is_sorted
polars.Series.is_temporal
polars.Series.is_unique
polars.Series.is_utf8
polars.Series.len
polars.Series.lower_bound
polars.Series.n_chunks
polars.Series.n_unique
polars.Series.null_count
polars.Series.unique_counts
polars.Series.upper_bound
polars.Series.value_counts
Export
polars.Series.to_arrow
polars.Series.to_frame
polars.Series.to_list
polars.Series.to_numpy
polars.Series.to_pandas
List
polars.Series.arr.arg_max
polars.Series.arr.arg_min
polars.Series.arr.concat
polars.Series.arr.contains
polars.Series.arr.count_match
polars.Series.arr.diff
polars.Series.arr.eval
polars.Series.arr.explode
polars.Series.arr.first
polars.Series.arr.get
polars.Series.arr.head
polars.Series.arr.join
polars.Series.arr.last
polars.Series.arr.lengths
polars.Series.arr.max
polars.Series.arr.mean
polars.Series.arr.min
polars.Series.arr.reverse
polars.Series.arr.shift
polars.Series.arr.slice
polars.Series.arr.sort
polars.Series.arr.sum
polars.Series.arr.tail
polars.Series.arr.take
polars.Series.arr.to_struct
polars.Series.arr.unique
Manipulation/selection
polars.Series.alias
polars.Series.append
polars.Series.arg_sort
polars.Series.argsort
polars.Series.cast
polars.Series.ceil
polars.Series.clear
polars.Series.clip
polars.Series.clip_max
polars.Series.clip_min
polars.Series.clone
polars.Series.cut
polars.Series.drop_nans
polars.Series.drop_nulls
polars.Series.explode
polars.Series.extend_constant
polars.Series.fill_nan
polars.Series.fill_null
polars.Series.filter
polars.Series.floor
polars.Series.head
polars.Series.hist
polars.Series.interpolate
polars.Series.item
polars.Series.limit
polars.Series.new_from_index
polars.Series.qcut
polars.Series.rechunk
polars.Series.rename
polars.Series.reshape
polars.Series.reverse
polars.Series.round
polars.Series.sample
polars.Series.set
polars.Series.set_at_idx
polars.Series.shift
polars.Series.shift_and_fill
polars.Series.shrink_dtype
polars.Series.shrink_to_fit
polars.Series.shuffle
polars.Series.slice
polars.Series.sort
polars.Series.tail
polars.Series.take
polars.Series.take_every
polars.Series.to_dummies
polars.Series.top_k
polars.Series.unique
polars.Series.view
polars.Series.zip_with
Miscellaneous
polars.Series.apply
polars.Series.reinterpret
polars.Series.series_equal
polars.Series.set_sorted
polars.Series.to_physical
polars.Series.get_chunks
String
polars.Series.str.concat
polars.Series.str.contains
polars.Series.str.count_match
polars.Series.str.decode
polars.Series.str.encode
polars.Series.str.ends_with
polars.Series.str.explode
polars.Series.str.extract
polars.Series.str.extract_all
polars.Series.str.json_extract
polars.Series.str.json_path_match
polars.Series.str.lengths
polars.Series.str.ljust
polars.Series.str.lstrip
polars.Series.str.n_chars
polars.Series.str.replace
polars.Series.str.replace_all
polars.Series.str.rjust
polars.Series.str.rstrip
polars.Series.str.slice
polars.Series.str.split
polars.Series.str.split_exact
polars.Series.str.splitn
polars.Series.str.starts_with
polars.Series.str.strip
polars.Series.str.strptime
polars.Series.str.to_lowercase
polars.Series.str.to_uppercase
polars.Series.str.zfill
polars.Series.str.parse_int
Struct
polars.Series.struct.field
polars.Series.struct.rename_fields
polars.Series.struct.unnest
polars.Series.struct.fields
Temporal
polars.Series.dt.cast_time_unit
polars.Series.dt.replace_time_zone
polars.Series.dt.combine
polars.Series.dt.date
polars.Series.dt.datetime
polars.Series.dt.day
polars.Series.dt.days
polars.Series.dt.epoch
polars.Series.dt.hour
polars.Series.dt.hours
polars.Series.dt.is_leap_year
polars.Series.dt.iso_year
polars.Series.dt.max
polars.Series.dt.mean
polars.Series.dt.median
polars.Series.dt.microsecond
polars.Series.dt.microseconds
polars.Series.dt.millisecond
polars.Series.dt.milliseconds
polars.Series.dt.min
polars.Series.dt.minute
polars.Series.dt.minutes
polars.Series.dt.month
polars.Series.dt.nanosecond
polars.Series.dt.nanoseconds
polars.Series.dt.offset_by
polars.Series.dt.ordinal_day
polars.Series.dt.quarter
polars.Series.dt.round
polars.Series.dt.second
polars.Series.dt.seconds
polars.Series.dt.strftime
polars.Series.dt.time
polars.Series.dt.timestamp
polars.Series.dt.truncate
polars.Series.dt.week
polars.Series.dt.weekday
polars.Series.dt.with_time_unit
polars.Series.dt.convert_time_zone
polars.Series.dt.year
DataFrame
Aggregation
polars.DataFrame.max
polars.DataFrame.mean
polars.DataFrame.median
polars.DataFrame.min
polars.DataFrame.product
polars.DataFrame.quantile
polars.DataFrame.std
polars.DataFrame.sum
polars.DataFrame.var
Attributes
polars.DataFrame.columns
polars.DataFrame.dtypes
polars.DataFrame.height
polars.DataFrame.schema
polars.DataFrame.shape
polars.DataFrame.width
Computation
polars.DataFrame.fold
polars.DataFrame.hash_rows
Descriptive
polars.DataFrame.describe
polars.DataFrame.glimpse
polars.DataFrame.estimated_size
polars.DataFrame.is_duplicated
polars.DataFrame.is_empty
polars.DataFrame.is_unique
polars.DataFrame.n_chunks
polars.DataFrame.n_unique
polars.DataFrame.null_count
Export
polars.DataFrame.__dataframe__
polars.DataFrame.to_arrow
polars.DataFrame.to_dict
polars.DataFrame.to_dicts
polars.DataFrame.to_numpy
polars.DataFrame.to_pandas
polars.DataFrame.to_struct
GroupBy
polars.dataframe.groupby.GroupBy.__iter__
polars.dataframe.groupby.GroupBy.agg
polars.dataframe.groupby.GroupBy.all
polars.dataframe.groupby.GroupBy.apply
polars.dataframe.groupby.GroupBy.count
polars.dataframe.groupby.GroupBy.first
polars.dataframe.groupby.GroupBy.head
polars.dataframe.groupby.GroupBy.last
polars.dataframe.groupby.GroupBy.max
polars.dataframe.groupby.GroupBy.mean
polars.dataframe.groupby.GroupBy.median
polars.dataframe.groupby.GroupBy.min
polars.dataframe.groupby.GroupBy.n_unique
polars.dataframe.groupby.GroupBy.quantile
polars.dataframe.groupby.GroupBy.sum
polars.dataframe.groupby.GroupBy.tail
Manipulation/selection
polars.DataFrame.clear
polars.DataFrame.clone
polars.DataFrame.drop
polars.DataFrame.drop_in_place
polars.DataFrame.drop_nulls
polars.DataFrame.explode
polars.DataFrame.extend
polars.DataFrame.fill_nan
polars.DataFrame.fill_null
polars.DataFrame.filter
polars.DataFrame.find_idx_by_name
polars.DataFrame.get_column
polars.DataFrame.get_columns
polars.DataFrame.groupby
polars.DataFrame.groupby_dynamic
polars.DataFrame.groupby_rolling
polars.DataFrame.head
polars.DataFrame.hstack
polars.DataFrame.insert_at_idx
polars.DataFrame.interpolate
polars.DataFrame.item
polars.DataFrame.iter_rows
polars.DataFrame.iter_slices
polars.DataFrame.join
polars.DataFrame.join_asof
polars.DataFrame.limit
polars.DataFrame.melt
polars.DataFrame.merge_sorted
polars.DataFrame.partition_by
polars.DataFrame.pipe
polars.DataFrame.pivot
polars.DataFrame.rechunk
polars.DataFrame.rename
polars.DataFrame.replace
polars.DataFrame.replace_at_idx
polars.DataFrame.reverse
polars.DataFrame.row
polars.DataFrame.rows
polars.DataFrame.sample
polars.DataFrame.select
polars.DataFrame.shift
polars.DataFrame.shift_and_fill
polars.DataFrame.shrink_to_fit
polars.DataFrame.slice
polars.DataFrame.sort
polars.DataFrame.tail
polars.DataFrame.take_every
polars.DataFrame.top_k
polars.DataFrame.to_dummies
polars.DataFrame.to_series
polars.DataFrame.transpose
polars.DataFrame.unique
polars.DataFrame.unnest
polars.DataFrame.unstack
polars.DataFrame.update
polars.DataFrame.upsample
polars.DataFrame.vstack
polars.DataFrame.with_columns
polars.DataFrame.with_row_count
Miscellaneous
polars.DataFrame.apply
polars.DataFrame.corr
polars.DataFrame.frame_equal
polars.DataFrame.lazy
LazyFrame
Aggregation
polars.LazyFrame.max
polars.LazyFrame.mean
polars.LazyFrame.median
polars.LazyFrame.min
polars.LazyFrame.quantile
polars.LazyFrame.std
polars.LazyFrame.sum
polars.LazyFrame.var
Attributes
polars.LazyFrame.columns
polars.LazyFrame.dtypes
polars.LazyFrame.schema
polars.LazyFrame.width
Descriptive
polars.LazyFrame.explain
polars.LazyFrame.show_graph
GroupBy
polars.lazyframe.groupby.LazyGroupBy.agg
polars.lazyframe.groupby.LazyGroupBy.all
polars.lazyframe.groupby.LazyGroupBy.apply
polars.lazyframe.groupby.LazyGroupBy.count
polars.lazyframe.groupby.LazyGroupBy.first
polars.lazyframe.groupby.LazyGroupBy.head
polars.lazyframe.groupby.LazyGroupBy.last
polars.lazyframe.groupby.LazyGroupBy.max
polars.lazyframe.groupby.LazyGroupBy.mean
polars.lazyframe.groupby.LazyGroupBy.median
polars.lazyframe.groupby.LazyGroupBy.min
polars.lazyframe.groupby.LazyGroupBy.n_unique
polars.lazyframe.groupby.LazyGroupBy.quantile
polars.lazyframe.groupby.LazyGroupBy.sum
polars.lazyframe.groupby.LazyGroupBy.tail
Manipulation/selection
polars.LazyFrame.clear
polars.LazyFrame.clone
polars.LazyFrame.drop
polars.LazyFrame.drop_nulls
polars.LazyFrame.explode
polars.LazyFrame.fill_nan
polars.LazyFrame.fill_null
polars.LazyFrame.filter
polars.LazyFrame.first
polars.LazyFrame.groupby
polars.LazyFrame.groupby_dynamic
polars.LazyFrame.groupby_rolling
polars.LazyFrame.head
polars.LazyFrame.inspect
polars.LazyFrame.interpolate
polars.LazyFrame.join
polars.LazyFrame.join_asof
polars.LazyFrame.last
polars.LazyFrame.limit
polars.LazyFrame.melt
polars.LazyFrame.merge_sorted
polars.LazyFrame.rename
polars.LazyFrame.reverse
polars.LazyFrame.select
polars.LazyFrame.shift
polars.LazyFrame.shift_and_fill
polars.LazyFrame.slice
polars.LazyFrame.sort
polars.LazyFrame.tail
polars.LazyFrame.take_every
polars.LazyFrame.top_k
polars.LazyFrame.unique
polars.LazyFrame.unnest
polars.LazyFrame.update
polars.LazyFrame.with_columns
polars.LazyFrame.with_context
polars.LazyFrame.with_row_count
Miscellaneous
polars.LazyFrame.cache
polars.LazyFrame.collect
polars.LazyFrame.fetch
polars.LazyFrame.lazy
polars.LazyFrame.map
polars.LazyFrame.pipe
polars.LazyFrame.profile
polars.LazyFrame.sink_ipc
polars.LazyFrame.sink_parquet
polars.LazyFrame.from_json
polars.LazyFrame.read_json
polars.LazyFrame.write_json
Expressions
Aggregation
polars.Expr.agg_groups
polars.Expr.arg_max
polars.Expr.arg_min
polars.Expr.count
polars.Expr.first
polars.Expr.last
polars.Expr.len
polars.Expr.list
polars.Expr.max
polars.Expr.mean
polars.Expr.median
polars.Expr.min
polars.Expr.nan_max
polars.Expr.nan_min
polars.Expr.product
polars.Expr.quantile
polars.Expr.std
polars.Expr.sum
polars.Expr.var
Binary
polars.Expr.bin.contains
polars.Expr.bin.decode
polars.Expr.bin.encode
polars.Expr.bin.ends_with
polars.Expr.bin.starts_with
Boolean
polars.Expr.all
polars.Expr.any
polars.Expr.is_between
polars.Expr.is_duplicated
polars.Expr.is_finite
polars.Expr.is_first
polars.Expr.is_in
polars.Expr.is_infinite
polars.Expr.is_nan
polars.Expr.is_not
polars.Expr.is_not_nan
polars.Expr.is_not_null
polars.Expr.is_null
polars.Expr.is_unique
Categories
polars.Expr.cat.set_ordering
Columns / names
polars.col
polars.Expr.alias
polars.Expr.exclude
polars.Expr.keep_name
polars.Expr.map_alias
polars.Expr.prefix
polars.Expr.suffix
Computation
polars.Expr.abs
polars.Expr.arccos
polars.Expr.arccosh
polars.Expr.arcsin
polars.Expr.arcsinh
polars.Expr.arctan
polars.Expr.arctanh
polars.Expr.arg_unique
polars.Expr.cos
polars.Expr.cosh
polars.Expr.cumcount
polars.Expr.cummax
polars.Expr.cummin
polars.Expr.cumprod
polars.Expr.cumsum
polars.Expr.cumulative_eval
polars.Expr.diff
polars.Expr.dot
polars.Expr.entropy
polars.Expr.ewm_mean
polars.Expr.ewm_std
polars.Expr.ewm_var
polars.Expr.exp
polars.Expr.hash
polars.Expr.kurtosis
polars.Expr.log
polars.Expr.log10
polars.Expr.mode
polars.Expr.n_unique
polars.Expr.null_count
polars.Expr.pct_change
polars.Expr.pow
polars.Expr.rank
polars.Expr.rolling_apply
polars.Expr.rolling_max
polars.Expr.rolling_mean
polars.Expr.rolling_median
polars.Expr.rolling_min
polars.Expr.rolling_quantile
polars.Expr.rolling_skew
polars.Expr.rolling_std
polars.Expr.rolling_sum
polars.Expr.rolling_var
polars.Expr.search_sorted
polars.Expr.sign
polars.Expr.sin
polars.Expr.sinh
polars.Expr.skew
polars.Expr.sqrt
polars.Expr.tan
polars.Expr.tanh
polars.Expr.unique
polars.Expr.unique_counts
polars.Expr.value_counts
Functions
polars.all
polars.any
polars.apply
polars.arange
polars.arg_sort_by
polars.avg
polars.coalesce
polars.concat_list
polars.concat_str
polars.corr
polars.count
polars.cov
polars.cumfold
polars.cumreduce
polars.cumsum
polars.date
polars.datetime
polars.duration
polars.element
polars.exclude
polars.first
polars.fold
polars.format
polars.from_epoch
polars.groups
polars.head
polars.list
polars.lit
polars.map
polars.max
polars.mean
polars.median
polars.min
polars.n_unique
polars.pearson_corr
polars.quantile
polars.reduce
polars.repeat
polars.select
polars.spearman_rank_corr
polars.std
polars.struct
polars.sum
polars.tail
polars.var
polars.when
polars.Expr.all
polars.Expr.any
polars.Expr.apply
polars.Expr.count
polars.Expr.cumsum
polars.Expr.exclude
polars.Expr.first
polars.Expr.head
polars.Expr.list
polars.Expr.map
polars.Expr.max
polars.Expr.mean
polars.Expr.median
polars.Expr.min
polars.Expr.n_unique
polars.Expr.quantile
polars.Expr.std
polars.Expr.sum
polars.Expr.tail
polars.Expr.var
List
polars.Expr.arr.arg_max
polars.Expr.arr.arg_min
polars.Expr.arr.concat
polars.Expr.arr.contains
polars.Expr.arr.count_match
polars.Expr.arr.diff
polars.Expr.arr.eval
polars.Expr.arr.explode
polars.Expr.arr.first
polars.Expr.arr.get
polars.Expr.arr.head
polars.Expr.arr.join
polars.Expr.arr.last
polars.Expr.arr.lengths
polars.Expr.arr.max
polars.Expr.arr.mean
polars.Expr.arr.min
polars.Expr.arr.reverse
polars.Expr.arr.shift
polars.Expr.arr.slice
polars.Expr.arr.sort
polars.Expr.arr.sum
polars.Expr.arr.tail
polars.Expr.arr.take
polars.Expr.arr.to_struct
polars.Expr.arr.unique
Manipulation/selection
polars.Expr.append
polars.Expr.arg_sort
polars.Expr.argsort
polars.Expr.arg_true
polars.Expr.backward_fill
polars.Expr.cast
polars.Expr.ceil
polars.Expr.clip
polars.Expr.clip_max
polars.Expr.clip_min
polars.Expr.drop_nans
polars.Expr.drop_nulls
polars.Expr.explode
polars.Expr.extend_constant
polars.Expr.fill_nan
polars.Expr.fill_null
polars.Expr.filter
polars.Expr.flatten
polars.Expr.floor
polars.Expr.forward_fill
polars.Expr.head
polars.Expr.inspect
polars.Expr.interpolate
polars.Expr.limit
polars.Expr.lower_bound
polars.Expr.map_dict
polars.Expr.pipe
polars.Expr.rechunk
polars.Expr.reinterpret
polars.Expr.repeat_by
polars.Expr.reshape
polars.Expr.reverse
polars.Expr.round
polars.Expr.sample
polars.Expr.shift
polars.Expr.shift_and_fill
polars.Expr.shrink_dtype
polars.Expr.shuffle
polars.Expr.slice
polars.Expr.sort
polars.Expr.sort_by
polars.Expr.tail
polars.Expr.take
polars.Expr.take_every
polars.Expr.to_physical
polars.Expr.top_k
polars.Expr.upper_bound
polars.Expr.where
Meta
polars.Expr.meta.has_multiple_outputs
polars.Expr.meta.is_regex_projection
polars.Expr.meta.output_name
polars.Expr.meta.pop
polars.Expr.meta.root_names
polars.Expr.meta.undo_aliases
Miscellaneous
polars.Expr.set_sorted
String
polars.Expr.str.concat
polars.Expr.str.contains
polars.Expr.str.count_match
polars.Expr.str.decode
polars.Expr.str.encode
polars.Expr.str.ends_with
polars.Expr.str.explode
polars.Expr.str.extract
polars.Expr.str.extract_all
polars.Expr.str.json_extract
polars.Expr.str.json_path_match
polars.Expr.str.lengths
polars.Expr.str.ljust
polars.Expr.str.lstrip
polars.Expr.str.n_chars
polars.Expr.str.replace
polars.Expr.str.replace_all
polars.Expr.str.rjust
polars.Expr.str.rstrip
polars.Expr.str.slice
polars.Expr.str.split
polars.Expr.str.split_exact
polars.Expr.str.splitn
polars.Expr.str.starts_with
polars.Expr.str.strip
polars.Expr.str.strptime
polars.Expr.str.to_lowercase
polars.Expr.str.to_uppercase
polars.Expr.str.zfill
polars.Expr.str.parse_int
Struct
polars.Expr.struct.field
polars.Expr.struct.rename_fields
Temporal
polars.Expr.dt.cast_time_unit
polars.Expr.dt.replace_time_zone
polars.Expr.dt.combine
polars.Expr.dt.date
polars.Expr.dt.datetime
polars.Expr.dt.day
polars.Expr.dt.days
polars.Expr.dt.epoch
polars.Expr.dt.hour
polars.Expr.dt.hours
polars.Expr.dt.is_leap_year
polars.Expr.dt.iso_year
polars.Expr.dt.microsecond
polars.Expr.dt.microseconds
polars.Expr.dt.millisecond
polars.Expr.dt.milliseconds
polars.Expr.dt.minute
polars.Expr.dt.minutes
polars.Expr.dt.month
polars.Expr.dt.nanosecond
polars.Expr.dt.nanoseconds
polars.Expr.dt.offset_by
polars.Expr.dt.ordinal_day
polars.Expr.dt.quarter
polars.Expr.dt.round
polars.Expr.dt.second
polars.Expr.dt.seconds
polars.Expr.dt.strftime
polars.Expr.dt.time
polars.Expr.dt.timestamp
polars.Expr.dt.truncate
polars.Expr.dt.week
polars.Expr.dt.weekday
polars.Expr.dt.with_time_unit
polars.Expr.dt.convert_time_zone
polars.Expr.dt.year
Window
polars.Expr.over
Extending the API
polars.api.register_expr_namespace
polars.api.register_dataframe_namespace
polars.api.register_lazyframe_namespace
polars.api.register_series_namespace
Functions
polars.from_arrow
polars.from_dataframe
polars.from_dict
polars.from_dicts
polars.from_numpy
polars.from_pandas
polars.from_records
polars.arg_where
polars.concat
polars.cut
polars.date_range
polars.get_dummies
polars.ones
polars.zeros
polars.align_frames
polars.collect_all
polars.toggle_string_cache
polars.StringCache
Data types
polars.DataType
polars.Decimal
polars.Float32
polars.Float64
polars.Int16
polars.Int32
polars.Int64
polars.Int8
polars.UInt16
polars.UInt32
polars.UInt64
polars.UInt8
polars.Date
polars.Datetime
polars.Duration
polars.Time
polars.List
polars.Struct
polars.Boolean
polars.Binary
polars.Categorical
polars.Null
polars.Object
polars.Utf8
polars.Unknown
Config
polars.Config.activate_decimals
polars.Config.set_ascii_tables
polars.Config.set_fmt_float
polars.Config.set_fmt_str_lengths
polars.Config.set_streaming_chunk_size
polars.Config.set_tbl_cell_alignment
polars.Config.set_tbl_cols
polars.Config.set_tbl_column_data_type_inline
polars.Config.set_tbl_dataframe_shape_below
polars.Config.set_tbl_formatting
polars.Config.set_tbl_hide_column_data_types
polars.Config.set_tbl_hide_column_names
polars.Config.set_tbl_hide_dataframe_shape
polars.Config.set_tbl_hide_dtype_separator
polars.Config.set_tbl_rows
polars.Config.set_tbl_width_chars
polars.Config.set_verbose
polars.Config.load
polars.Config.save
polars.Config.state
polars.Config.restore_defaults
Exceptions
polars.exceptions.ArrowError
polars.exceptions.ColumnNotFoundError
polars.exceptions.ComputeError
polars.exceptions.DuplicateError
polars.exceptions.InvalidOperationError
polars.exceptions.NoDataError
polars.exceptions.NoRowsReturned
polars.exceptions.PanicException
polars.exceptions.RowsException
polars.exceptions.SchemaError
polars.exceptions.SchemaFieldNotFoundError
polars.exceptions.ShapeError
polars.exceptions.StructFieldNotFoundError
polars.exceptions.TooManyRowsReturned
Testing
polars.testing.assert_frame_equal
polars.testing.assert_series_equal
polars.testing.parametric.dataframes
polars.testing.parametric.series
polars.testing.parametric.column
polars.testing.parametric.columns
Utils
polars.build_info
polars.get_index_type
polars.show_versions
polars.threadpool_size
SQL
polars.SQLContext.execute
polars.SQLContext.register
polars.SQLContext.query
API reference
List
polars.Series.arr.first
polars.Series.arr.first
#
Series.arr.
first
(
)
→
Series
[source]
#
Get the first value of the sublists.
On this page
Series.arr.first()