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Input/output
polars.read_csv
polars.read_csv_batched
polars.scan_csv
polars.DataFrame.write_csv
polars.LazyFrame.sink_csv
polars.read_ipc
polars.read_ipc_stream
polars.scan_ipc
polars.read_ipc_schema
polars.DataFrame.write_ipc
polars.DataFrame.write_ipc_stream
polars.LazyFrame.sink_ipc
polars.read_parquet
polars.scan_parquet
polars.read_parquet_schema
polars.DataFrame.write_parquet
polars.LazyFrame.sink_parquet
polars.read_database
polars.read_database_uri
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.read_ods
polars.DataFrame.write_excel
polars.scan_iceberg
polars.scan_delta
polars.read_delta
polars.DataFrame.write_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.implode
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
Array
polars.Series.arr.max
polars.Series.arr.min
polars.Series.arr.sum
polars.Series.arr.to_list
polars.Series.arr.unique
Attributes
polars.Series.cat
polars.Series.dt
polars.Series.dtype
polars.Series.inner_dtype
polars.Series.list
polars.Series.name
polars.Series.shape
polars.Series.str
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
polars.Series.not_
Categories
polars.Series.cat.get_categories
polars.Series.cat.is_local
polars.Series.cat.set_ordering
polars.Series.cat.to_local
polars.Series.cat.uses_lexical_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.cbrt
polars.Series.cos
polars.Series.cosh
polars.Series.cot
polars.Series.cum_max
polars.Series.cum_min
polars.Series.cum_prod
polars.Series.cum_sum
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.log1p
polars.Series.map_dict
polars.Series.pct_change
polars.Series.peak_max
polars.Series.peak_min
polars.Series.rank
polars.Series.replace
polars.Series.rolling_apply
polars.Series.rolling_map
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_first_distinct
polars.Series.is_float
polars.Series.is_in
polars.Series.is_infinite
polars.Series.is_integer
polars.Series.is_last
polars.Series.is_last_distinct
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
polars.Series.to_init_repr
List
polars.Series.list.all
polars.Series.list.any
polars.Series.list.drop_nulls
polars.Series.list.arg_max
polars.Series.list.arg_min
polars.Series.list.concat
polars.Series.list.contains
polars.Series.list.count_match
polars.Series.list.count_matches
polars.Series.list.diff
polars.Series.list.difference
polars.Series.list.eval
polars.Series.list.explode
polars.Series.list.first
polars.Series.list.gather
polars.Series.list.get
polars.Series.list.head
polars.Series.list.join
polars.Series.list.intersection
polars.Series.list.last
polars.Series.list.len
polars.Series.list.lengths
polars.Series.list.max
polars.Series.list.mean
polars.Series.list.min
polars.Series.list.reverse
polars.Series.list.sample
polars.Series.list.set_difference
polars.Series.list.set_intersection
polars.Series.list.set_symmetric_difference
polars.Series.list.set_union
polars.Series.list.shift
polars.Series.list.slice
polars.Series.list.sort
polars.Series.list.sum
polars.Series.list.symmetric_difference
polars.Series.list.tail
polars.Series.list.take
polars.Series.list.to_array
polars.Series.list.to_struct
polars.Series.list.union
polars.Series.list.unique
Manipulation/selection
polars.Series.alias
polars.Series.append
polars.Series.arg_sort
polars.Series.bottom_k
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
polars.Series.extend_constant
polars.Series.fill_nan
polars.Series.fill_null
polars.Series.filter
polars.Series.floor
polars.Series.gather
polars.Series.gather_every
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.rle
polars.Series.rle_id
polars.Series.round
polars.Series.round_sig_figs
polars.Series.sample
polars.Series.scatter
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.equals
polars.Series.map_elements
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.count_matches
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.extract_groups
polars.Series.str.json_decode
polars.Series.str.json_extract
polars.Series.str.json_path_match
polars.Series.str.len_bytes
polars.Series.str.len_chars
polars.Series.str.lengths
polars.Series.str.ljust
polars.Series.str.lstrip
polars.Series.str.n_chars
polars.Series.str.pad_end
polars.Series.str.pad_start
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.strip_chars
polars.Series.str.strip_chars_start
polars.Series.str.strip_chars_end
polars.Series.str.strip_prefix
polars.Series.str.strip_suffix
polars.Series.str.strptime
polars.Series.str.to_date
polars.Series.str.to_datetime
polars.Series.str.to_decimal
polars.Series.str.to_lowercase
polars.Series.str.to_time
polars.Series.str.to_titlecase
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
polars.Series.struct.json_encode
polars.Series.struct.schema
Temporal
polars.Series.dt.base_utc_offset
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.dst_offset
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.month_start
polars.Series.dt.month_end
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.to_string
polars.Series.dt.total_days
polars.Series.dt.total_hours
polars.Series.dt.total_microseconds
polars.Series.dt.total_milliseconds
polars.Series.dt.total_minutes
polars.Series.dt.total_nanoseconds
polars.Series.dt.total_seconds
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.max_horizontal
polars.DataFrame.mean
polars.DataFrame.mean_horizontal
polars.DataFrame.median
polars.DataFrame.min
polars.DataFrame.min_horizontal
polars.DataFrame.product
polars.DataFrame.quantile
polars.DataFrame.std
polars.DataFrame.sum
polars.DataFrame.sum_horizontal
polars.DataFrame.var
Attributes
polars.DataFrame.columns
polars.DataFrame.dtypes
polars.DataFrame.flags
polars.DataFrame.height
polars.DataFrame.schema
polars.DataFrame.shape
polars.DataFrame.width
Computation
polars.DataFrame.fold
polars.DataFrame.hash_rows
Descriptive
polars.DataFrame.approx_n_unique
polars.DataFrame.approx_unique
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_init_repr
polars.DataFrame.to_numpy
polars.DataFrame.to_pandas
polars.DataFrame.to_struct
GroupBy
polars.dataframe.group_by.GroupBy.__iter__
polars.dataframe.group_by.GroupBy.agg
polars.dataframe.group_by.GroupBy.all
polars.dataframe.group_by.GroupBy.apply
polars.dataframe.group_by.GroupBy.count
polars.dataframe.group_by.GroupBy.first
polars.dataframe.group_by.GroupBy.head
polars.dataframe.group_by.GroupBy.last
polars.dataframe.group_by.GroupBy.map_groups
polars.dataframe.group_by.GroupBy.max
polars.dataframe.group_by.GroupBy.mean
polars.dataframe.group_by.GroupBy.median
polars.dataframe.group_by.GroupBy.min
polars.dataframe.group_by.GroupBy.n_unique
polars.dataframe.group_by.GroupBy.quantile
polars.dataframe.group_by.GroupBy.sum
polars.dataframe.group_by.GroupBy.tail
Manipulation/selection
polars.DataFrame.bottom_k
polars.DataFrame.cast
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.gather_every
polars.DataFrame.get_column
polars.DataFrame.get_column_index
polars.DataFrame.get_columns
polars.DataFrame.group_by
polars.DataFrame.group_by_dynamic
polars.DataFrame.group_by_rolling
polars.DataFrame.groupby
polars.DataFrame.groupby_dynamic
polars.DataFrame.groupby_rolling
polars.DataFrame.head
polars.DataFrame.hstack
polars.DataFrame.insert_at_idx
polars.DataFrame.insert_column
polars.DataFrame.interpolate
polars.DataFrame.item
polars.DataFrame.iter_columns
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.replace_column
polars.DataFrame.reverse
polars.DataFrame.rolling
polars.DataFrame.row
polars.DataFrame.rows
polars.DataFrame.rows_by_key
polars.DataFrame.sample
polars.DataFrame.select
polars.DataFrame.select_seq
polars.DataFrame.set_sorted
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_columns_seq
polars.DataFrame.with_row_count
Miscellaneous
polars.DataFrame.apply
polars.DataFrame.corr
polars.DataFrame.equals
polars.DataFrame.frame_equal
polars.DataFrame.lazy
polars.DataFrame.map_rows
LazyFrame
Aggregation
polars.LazyFrame.max
polars.LazyFrame.mean
polars.LazyFrame.median
polars.LazyFrame.min
polars.LazyFrame.null_count
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.group_by.LazyGroupBy.agg
polars.lazyframe.group_by.LazyGroupBy.all
polars.lazyframe.group_by.LazyGroupBy.apply
polars.lazyframe.group_by.LazyGroupBy.count
polars.lazyframe.group_by.LazyGroupBy.first
polars.lazyframe.group_by.LazyGroupBy.head
polars.lazyframe.group_by.LazyGroupBy.last
polars.lazyframe.group_by.LazyGroupBy.map_groups
polars.lazyframe.group_by.LazyGroupBy.max
polars.lazyframe.group_by.LazyGroupBy.mean
polars.lazyframe.group_by.LazyGroupBy.median
polars.lazyframe.group_by.LazyGroupBy.min
polars.lazyframe.group_by.LazyGroupBy.n_unique
polars.lazyframe.group_by.LazyGroupBy.quantile
polars.lazyframe.group_by.LazyGroupBy.sum
polars.lazyframe.group_by.LazyGroupBy.tail
Manipulation/selection
polars.LazyFrame.approx_n_unique
polars.LazyFrame.approx_unique
polars.LazyFrame.bottom_k
polars.LazyFrame.cast
polars.LazyFrame.clear
polars.LazyFrame.clone
polars.LazyFrame.drop
polars.LazyFrame.drop_nulls
polars.LazyFrame.explode
polars.LazyFrame.gather_every
polars.LazyFrame.fill_nan
polars.LazyFrame.fill_null
polars.LazyFrame.filter
polars.LazyFrame.first
polars.LazyFrame.group_by
polars.LazyFrame.group_by_dynamic
polars.LazyFrame.group_by_rolling
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.rolling
polars.LazyFrame.select
polars.LazyFrame.select_seq
polars.LazyFrame.set_sorted
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_columns_seq
polars.LazyFrame.with_context
polars.LazyFrame.with_row_count
Miscellaneous
polars.LazyFrame.cache
polars.LazyFrame.collect
polars.LazyFrame.collect_async
polars.LazyFrame.fetch
polars.LazyFrame.lazy
polars.LazyFrame.map
polars.LazyFrame.map_batches
polars.LazyFrame.pipe
polars.LazyFrame.profile
polars.LazyFrame.deserialize
polars.LazyFrame.from_json
polars.LazyFrame.read_json
polars.LazyFrame.serialize
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.implode
polars.Expr.last
polars.Expr.len
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
Array
polars.Expr.arr.max
polars.Expr.arr.min
polars.Expr.arr.sum
polars.Expr.arr.to_list
polars.Expr.arr.unique
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_first_distinct
polars.Expr.is_in
polars.Expr.is_infinite
polars.Expr.is_last
polars.Expr.is_last_distinct
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
polars.Expr.not_
Categories
polars.Expr.cat.get_categories
polars.Expr.cat.set_ordering
Columns / names
polars.Expr.alias
polars.Expr.exclude
polars.Expr.keep_name
polars.Expr.map_alias
polars.Expr.prefix
polars.Expr.suffix
polars.col
Computation
polars.Expr.abs
polars.Expr.approx_n_unique
polars.Expr.arccos
polars.Expr.arccosh
polars.Expr.arcsin
polars.Expr.arcsinh
polars.Expr.arctan
polars.Expr.arctanh
polars.Expr.arg_unique
polars.Expr.cbrt
polars.Expr.cos
polars.Expr.cosh
polars.Expr.cot
polars.Expr.cum_count
polars.Expr.cum_max
polars.Expr.cum_min
polars.Expr.cum_prod
polars.Expr.cum_sum
polars.Expr.cumcount
polars.Expr.cummax
polars.Expr.cummin
polars.Expr.cumprod
polars.Expr.cumsum
polars.Expr.cumulative_eval
polars.Expr.degrees
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.log1p
polars.Expr.mode
polars.Expr.n_unique
polars.Expr.null_count
polars.Expr.pct_change
polars.Expr.peak_max
polars.Expr.peak_min
polars.Expr.radians
polars.Expr.rank
polars.Expr.rolling_apply
polars.Expr.rolling_map
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.all_horizontal
polars.any
polars.any_horizontal
polars.apply
polars.approx_n_unique
polars.arange
polars.arctan2
polars.arctan2d
polars.arg_sort_by
polars.arg_where
polars.avg
polars.coalesce
polars.concat_list
polars.concat_str
polars.corr
polars.count
polars.cov
polars.cum_fold
polars.cum_reduce
polars.cum_sum
polars.cum_sum_horizontal
polars.cumfold
polars.cumreduce
polars.cumsum
polars.cumsum_horizontal
polars.date
polars.datetime
polars.date_range
polars.date_ranges
polars.datetime_range
polars.datetime_ranges
polars.duration
polars.element
polars.exclude
polars.first
polars.fold
polars.format
polars.from_epoch
polars.groups
polars.head
polars.implode
polars.int_range
polars.int_ranges
polars.last
polars.lit
polars.map
polars.map_batches
polars.map_groups
polars.max
polars.max_horizontal
polars.mean
polars.median
polars.min
polars.min_horizontal
polars.n_unique
polars.ones
polars.quantile
polars.reduce
polars.repeat
polars.rolling_corr
polars.rolling_cov
polars.select
polars.std
polars.struct
polars.sum
polars.sum_horizontal
polars.sql_expr
polars.tail
polars.time
polars.time_range
polars.time_ranges
polars.var
polars.when
polars.zeros
polars.Expr.all
polars.Expr.any
polars.Expr.apply
polars.Expr.approx_n_unique
polars.Expr.count
polars.Expr.cumsum
polars.Expr.exclude
polars.Expr.first
polars.Expr.head
polars.Expr.implode
polars.Expr.map
polars.Expr.map_batches
polars.Expr.map_elements
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.list.all
polars.Expr.list.any
polars.Expr.list.drop_nulls
polars.Expr.list.arg_max
polars.Expr.list.arg_min
polars.Expr.list.concat
polars.Expr.list.contains
polars.Expr.list.count_match
polars.Expr.list.count_matches
polars.Expr.list.diff
polars.Expr.list.difference
polars.Expr.list.eval
polars.Expr.list.explode
polars.Expr.list.first
polars.Expr.list.gather
polars.Expr.list.get
polars.Expr.list.head
polars.Expr.list.intersection
polars.Expr.list.join
polars.Expr.list.last
polars.Expr.list.len
polars.Expr.list.lengths
polars.Expr.list.max
polars.Expr.list.mean
polars.Expr.list.min
polars.Expr.list.reverse
polars.Expr.list.sample
polars.Expr.list.set_difference
polars.Expr.list.set_intersection
polars.Expr.list.set_symmetric_difference
polars.Expr.list.set_union
polars.Expr.list.shift
polars.Expr.list.slice
polars.Expr.list.sort
polars.Expr.list.sum
polars.Expr.list.symmetric_difference
polars.Expr.list.tail
polars.Expr.list.take
polars.Expr.list.to_array
polars.Expr.list.to_struct
polars.Expr.list.union
polars.Expr.list.unique
Manipulation/selection
polars.Expr.append
polars.Expr.arg_sort
polars.Expr.arg_true
polars.Expr.backward_fill
polars.Expr.bottom_k
polars.Expr.cast
polars.Expr.ceil
polars.Expr.clip
polars.Expr.clip_max
polars.Expr.clip_min
polars.Expr.cut
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.gather
polars.Expr.gather_every
polars.Expr.get
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.qcut
polars.Expr.rechunk
polars.Expr.reinterpret
polars.Expr.repeat_by
polars.Expr.replace
polars.Expr.reshape
polars.Expr.reverse
polars.Expr.rle
polars.Expr.rle_id
polars.Expr.round
polars.Expr.round_sig_figs
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.eq
polars.Expr.meta.has_multiple_outputs
polars.Expr.meta.is_regex_projection
polars.Expr.meta.ne
polars.Expr.meta.output_name
polars.Expr.meta.pop
polars.Expr.meta.tree_format
polars.Expr.meta.root_names
polars.Expr.meta.undo_aliases
polars.Expr.meta.write_json
Miscellaneous
polars.Expr.cache
polars.Expr.from_json
polars.Expr.set_sorted
Name
polars.Expr.name.keep
polars.Expr.name.map
polars.Expr.name.prefix
polars.Expr.name.suffix
polars.Expr.name.to_lowercase
polars.Expr.name.to_uppercase
Operators
polars.Expr.and_
polars.Expr.or_
polars.Expr.eq
polars.Expr.eq_missing
polars.Expr.ge
polars.Expr.gt
polars.Expr.le
polars.Expr.lt
polars.Expr.ne
polars.Expr.ne_missing
polars.Expr.add
polars.Expr.floordiv
polars.Expr.mod
polars.Expr.mul
polars.Expr.sub
polars.Expr.truediv
polars.Expr.pow
polars.Expr.xor
String
polars.Expr.str.concat
polars.Expr.str.contains
polars.Expr.str.count_match
polars.Expr.str.count_matches
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.extract_groups
polars.Expr.str.json_decode
polars.Expr.str.json_extract
polars.Expr.str.json_path_match
polars.Expr.str.len_bytes
polars.Expr.str.len_chars
polars.Expr.str.lengths
polars.Expr.str.ljust
polars.Expr.str.lstrip
polars.Expr.str.n_chars
polars.Expr.str.pad_end
polars.Expr.str.pad_start
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.strip_chars
polars.Expr.str.strip_chars_start
polars.Expr.str.strip_chars_end
polars.Expr.str.strip_prefix
polars.Expr.str.strip_suffix
polars.Expr.str.strptime
polars.Expr.str.to_date
polars.Expr.str.to_datetime
polars.Expr.str.to_decimal
polars.Expr.str.to_lowercase
polars.Expr.str.to_titlecase
polars.Expr.str.to_time
polars.Expr.str.to_uppercase
polars.Expr.str.zfill
polars.Expr.str.parse_int
Struct
polars.Expr.struct.field
polars.Expr.struct.json_encode
polars.Expr.struct.rename_fields
Temporal
polars.Expr.dt.base_utc_offset
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.dst_offset
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.month_start
polars.Expr.dt.month_end
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.to_string
polars.Expr.dt.total_days
polars.Expr.dt.total_hours
polars.Expr.dt.total_microseconds
polars.Expr.dt.total_milliseconds
polars.Expr.dt.total_minutes
polars.Expr.dt.total_nanoseconds
polars.Expr.dt.total_seconds
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
polars.Expr.rolling
Selectors
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.from_repr
polars.align_frames
polars.concat
polars.collect_all
polars.collect_all_async
polars.set_random_seed
polars.StringCache
polars.enable_string_cache
polars.disable_string_cache
polars.using_string_cache
Data types
polars.DataType
polars.Decimal
polars.Float32
polars.Float64
polars.Int8
polars.Int16
polars.Int32
polars.Int64
polars.UInt8
polars.UInt16
polars.UInt32
polars.UInt64
polars.Date
polars.Datetime
polars.Duration
polars.Time
polars.Array
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_auto_structify
polars.Config.set_decimal_separator
polars.Config.set_float_precision
polars.Config.set_fmt_float
polars.Config.set_fmt_str_lengths
polars.Config.set_fmt_table_cell_list_len
polars.Config.set_streaming_chunk_size
polars.Config.set_tbl_cell_alignment
polars.Config.set_tbl_cell_numeric_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_thousands_separator
polars.Config.set_trim_decimal_zeros
polars.Config.set_verbose
polars.Config.load
polars.Config.load_from_file
polars.Config.save
polars.Config.save_to_file
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.NoRowsReturnedError
polars.exceptions.PolarsPanicError
polars.exceptions.RowsError
polars.exceptions.SchemaError
polars.exceptions.SchemaFieldNotFoundError
polars.exceptions.ShapeError
polars.exceptions.StructFieldNotFoundError
polars.exceptions.TooManyRowsReturnedError
Testing
polars.testing.assert_frame_equal
polars.testing.assert_frame_not_equal
polars.testing.assert_series_equal
polars.testing.assert_series_not_equal
polars.testing.parametric.dataframes
polars.testing.parametric.series
polars.testing.parametric.column
polars.testing.parametric.columns
polars.testing.parametric.create_list_strategy
polars.testing.parametric.load_profile
polars.testing.parametric.set_profile
Utils
polars.build_info
polars.get_index_type
polars.show_versions
polars.threadpool_size
SQL
polars.SQLContext.execute
polars.SQLContext.register
polars.SQLContext.register_globals
polars.SQLContext.register_many
polars.SQLContext.unregister
polars.SQLContext.tables
API reference
List
polars.Serie...
polars.Series.list.first
#
Series.list.
first
(
)
→
Series
[source]
#
Get the first value of the sublists.
On this page
Series.list.first()