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[Solved] TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced Error Occurs?

Today I get the following error TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced in python.

How To Solve TypeError: ufunc ‘isnan’ not supported for the input types, and the inputs could not be safely coerced Error ?

  1. How To Solve TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced Error ?

    To Solve TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced Error isnan(ndarray) fails on ndarray dtype of “object”
    isnan(ndarray.astype(np.float)), but strings cannot be coerced to float.

  2. TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced

    To Solve TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced Error isnan(ndarray) fails on ndarray dtype of “object”
    isnan(ndarray.astype(np.float)), but strings cannot be coerced to float.

Solution 1

What’s the dtype of temps. I can reproduce your warning and error with a string dtype:

In [26]: temps = np.array([1,2,'string',0])
In [27]: temps
Out[27]: array(['1', '2', 'string', '0'], dtype='<U21')
In [28]: temps==-99.9
/usr/local/bin/ipython3:1: FutureWarning: elementwise comparison failed; returning scalar instead, but in the future will perform elementwise comparison
  #!/usr/bin/python3
Out[28]: False
In [29]: np.isnan(temps)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-29-2ff7754ed926> in <module>()
----> 1 np.isnan(temps)

TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

First, comparing strings with the number gives this future warning.

Second, testing for nan produces the error.

Note that given the dtype, the nan assignment assigns a string value, not a float (np.nan is a float).

In [30]: temps[-1] = np.nan
In [31]: temps
Out[31]: array(['1', '2', 'string', 'nan'], dtype='<U21')

Solution 2

isnan(ndarray) fails on ndarray dtype of “object”

isnan(ndarray.astype(np.float)), but strings cannot be coerced to float.

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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