`scipy.io._mmio:mminfo`

Signature

def mminfo(source)

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

source : str or file-like: Matrix Market filename (extension .mtx) or open file-like object

rows : int: Number of matrix rows.
cols : int: Number of matrix columns.
entries : int: Number of non-zero entries of a sparse matrix or rows*cols for a dense matrix.
format : str: Either 'coordinate' or 'array'.
field : str: Either 'real', 'complex', 'pattern', or 'integer'.
symmetry : str: Either 'general', 'symmetric', 'skew-symmetric', or 'hermitian'.

from io import StringIO
from scipy.io import mminfo

✓

text = '''%%MatrixMarket matrix coordinate real general
 5 5 7
 2 3 1.0
 3 4 2.0
 3 5 3.0
 4 1 4.0
 4 2 5.0
 4 3 6.0
 4 4 7.0
'''

✓

``mminfo(source)`` returns the number of rows, number of columns, format, field type and symmetry attribute of the source file.

mminfo(StringIO(text))

✓

(5, 5, 7, 'coordinate', 'real', 'general')