Functions

from_arrow(data[, schema, schema_overrides, ...])

Create a DataFrame or Series from an Arrow Table or Array.

from_dataframe(df, *[, allow_copy, rechunk])

Build a Polars DataFrame from any dataframe supporting the PyCapsule Interface.

from_dict(data[, schema, schema_overrides, ...])

Construct a DataFrame from a dictionary of sequences.

from_dicts(data[, schema, schema_overrides, ...])

Construct a DataFrame from a sequence of dictionaries.

from_numpy(data[, schema, schema_overrides, ...])

Construct a DataFrame from a NumPy ndarray.

from_pandas(data, *[, schema_overrides, ...])

Construct a Polars DataFrame or Series from a pandas DataFrame, Series, or Index.

from_records(data[, schema, ...])

Construct a DataFrame from a sequence of sequences.

from_repr(data)

Construct a Polars DataFrame or Series from its string representation.

json_normalize(data, *[, separator, ...])

Normalize semi-structured deserialized JSON data into a flat table.

align_frames(*frames, on[, how, select, ...])

Align a sequence of frames using common values from one or more columns as a key.

concat(items, *[, how, rechunk, parallel, ...])

Combine multiple DataFrames, LazyFrames, or Series into a single object.

union(items, *[, how, strict])

Combine multiple DataFrames, LazyFrames, or Series into a single object.

merge_sorted(items, key, *[, maintain_order])

Merge multiple sorted DataFrames or LazyFrames by the sorted key.

defer(function, *, schema[, validate_schema])

Deferred execution.

escape_regex(s)

Escapes string regex meta characters.

collect_all(lazy_frames, *[, type_coercion, ...])

Collect multiple LazyFrames at the same time.

collect_all_async(lazy_frames, *[, gevent, ...])

Collect multiple LazyFrames at the same time asynchronously in thread pool.

explain_all(lazy_frames, *[, optimizations])

Explain multiple LazyFrames as if passed to collect_all.

set_random_seed(seed)

Set the global random seed for Polars.

register_extension_type(ext_name[, ...])

Register the extension type for the given extension name.

unregister_extension_type(ext_name)

Unregister the extension type for the given extension name.

get_extension_type(ext_name)

Get the extension type class for the given extension name.

StringCache(**kwargs)

Does nothing.

enable_string_cache()

Does nothing.

disable_string_cache()

Does nothing.

using_string_cache()

Always returns true.