numpy.array2string()

a : ndarray

Input array.

max_line_width : int, optional

The maximum number of columns the string should span. Newline characters splits the string appropriately after array elements.

precision : int, optional

Floating point precision. Default is the current printing precision (usually 8), which can be altered using set_printoptions.

suppress_small : bool, optional

Represent very small numbers as zero. A number is ?very small? if it is smaller than the current printing precision.

separator : str, optional

Inserted between elements.

prefix : str, optional

An array is typically printed as:

The length of the prefix string is used to align the output correctly.

style : function, optional

A function that accepts an ndarray and returns a string. Used only when the shape of a is equal to (), i.e. for 0-D arrays.

formatter : dict of callables, optional

If not None, the keys should indicate the type(s) that the respective formatting function applies to. Callables should return a string. Types that are not specified (by their corresponding keys) are handled by the default formatters. Individual types for which a formatter can be set are:

Other keys that can be used to set a group of types at once are:

TypeError

if a callable in formatter does not return a string.