SciPy

This is documentation for an old release of SciPy (version 1.6.1). Read this page in the documentation of the latest stable release (version 1.15.1).

Input and output (scipy.io)

SciPy has many modules, classes, and functions available to read data from and write data to a variety of file formats.

MATLAB® files

loadmat(file_name[, mdict, appendmat])

Load MATLAB file.

savemat(file_name, mdict[, appendmat, …])

Save a dictionary of names and arrays into a MATLAB-style .mat file.

whosmat(file_name[, appendmat])

List variables inside a MATLAB file.

IDL® files

readsav(file_name[, idict, python_dict, …])

Read an IDL .sav file.

Matrix Market files

mminfo(source)

Return size and storage parameters from Matrix Market file-like ‘source’.

mmread(source)

Reads the contents of a Matrix Market file-like ‘source’ into a matrix.

mmwrite(target, a[, comment, field, …])

Writes the sparse or dense array a to Matrix Market file-like target.

Unformatted Fortran files

FortranFile(filename[, mode, header_dtype])

A file object for unformatted sequential files from Fortran code.

FortranEOFError

Indicates that the file ended properly.

FortranFormattingError

Indicates that the file ended mid-record.

Netcdf

netcdf_file(filename[, mode, mmap, version, …])

A file object for NetCDF data.

netcdf_variable(data, typecode, size, shape, …)

A data object for netcdf files.

Harwell-Boeing files

hb_read(path_or_open_file)

Read HB-format file.

hb_write(path_or_open_file, m[, hb_info])

Write HB-format file.

Wav sound files (scipy.io.wavfile)

read(filename[, mmap])

Open a WAV file.

write(filename, rate, data)

Write a NumPy array as a WAV file.

WavFileWarning

Arff files (scipy.io.arff)

loadarff(f)

Read an arff file.

MetaData(rel, attr)

Small container to keep useful information on a ARFF dataset.

ArffError

ParseArffError