Functions

Conversion

from_arrow(data[, schema, schema_overrides, ...])	Create a DataFrame or Series from an Arrow Table or Array.
from_dataframe(df, *[, allow_copy])	Build a Polars DataFrame from any dataframe supporting the interchange protocol.
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.

Miscellaneous

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.

Parallelization

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.

Random

set_random_seed(seed)

Set the global random seed for Polars.

StringCache

Note that the StringCache can be used as both a context manager and a decorator, in order to explicitly scope cache lifetime.

StringCache()	Context manager for enabling and disabling the global string cache.
enable_string_cache([enable])	Enable the global string cache.
disable_string_cache()	Disable and clear the global string cache.
using_string_cache()	Check whether the global string cache is enabled.