function missing 1 required positional argument: 'shape'

Package:

8546

Exception Class:

TypeError

Raise code

if not (-2 <= axis <= 1):
            raise ValueError("axis out of range")


def check_shape(args, current_shape=None):
    """Imitate numpy.matrix handling of shape arguments"""
    if len(args) == 0:
        raise TypeError("function missing 1 required positional argument: "
                        "'shape'")
    elif len(args) == 1:
        try:
            shape_iter = iter(args[0])
        except TypeError:
            new_shape = (operator.index(args[0]), )
        else:

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Links to the raise (1)

https://github.com/scipy/scipy/blob/e4b3e6eb372b8c1d875f2adf607630a31e2a609c/scipy/sparse/sputils.py#L280

Ways to fix

This exception is raised when trying to call the reshape method without the shape parameter.

Code to reproduce the exception:

import numpy as np
from scipy.sparse import csr_matrix
row = np.array([0, 0, 1, 2, 2, 2])
col = np.array([0, 2, 2, 0, 1, 2])
data = np.array([1, 2, 3, 4, 5, 6])
sm = csr_matrix((data, (row, col)), shape=(4, 3))
print(sm.shape)
new_sm = sm.reshape()

---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-21-d33536532489> in <module>()  11 sm = csr_matrix((data, (row, col)), shape=(4, 3))  12 print(sm.shape) ---> 13 new_sm = sm.reshape() 
/usr/local/lib/python3.7/dist-packages/scipy/sparse/base.py in reshape(self, *args, **kwargs)  121 # If the shape already matches, don't bother doing an actual reshape  122 # Otherwise, the default is to convert to COO and use its reshape --> 123 shape = check_shape(args, self.shape)  124 order, copy = check_reshape_kwargs(kwargs)  125 if shape == self.shape: 
/usr/local/lib/python3.7/dist-packages/scipy/sparse/sputils.py in check_shape(args, current_shape)  268 """Imitate numpy.matrix handling of shape arguments"""  269 if len(args) == 0: --> 270 raise TypeError("function missing 1 required positional argument: "  271 "'shape'")  272 elif len(args) == 1: 
TypeError: function missing 1 required positional argument: 'shape'

Fixed version of the code:

import numpy as np
from scipy.sparse import csr_matrix
row = np.array([0, 0, 1, 2, 2, 2])
col = np.array([0, 2, 2, 0, 1, 2])
data = np.array([1, 2, 3, 4, 5, 6])
sm = csr_matrix((data, (row, col)), shape=(4, 3))
print(sm.shape)
new_sm = sm.reshape((6,2))

(4, 3)

May 09, 2022

kellemnegasi 30.6k

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