numpy.array2string — NumPy v1.11 Manual (original) (raw)

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:

'prefix(' + array2string(a) + ')'

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:

• 'bool'
• 'int'
• 'timedelta' : a numpy.timedelta64
• 'datetime' : a numpy.datetime64
• 'float'
• 'longfloat' : 128-bit floats
• 'complexfloat'
• 'longcomplexfloat' : composed of two 128-bit floats
• 'numpy_str' : types numpy.string_ and numpy.unicode_
• 'str' : all other strings

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

• 'all' : sets all types
• 'int_kind' : sets 'int'
• 'float_kind' : sets 'float' and 'longfloat'
• 'complex_kind' : sets 'complexfloat' and 'longcomplexfloat'
• 'str_kind' : sets 'str' and 'numpystr'