Fix TypeError: int() argument must be a string, a bytes-like object or a number, not ‘map’ – Python Tutorial

By | December 16, 2020

In this tutorial, we will introduce you how to fix TypeError: int() argument must be a string, a bytes-like object or a number, not ‘map’ in python.

Look at this example code:

import numpy as np
usrs = []
usr = map(lambda x: x*x, [1,2,3])
usrs.append(np.asarray(usr, dtype=np.int32))

Run this code, you will get this error:

fix TypeError int() argument must be a string, a bytes-like object or a number, not 'map'

How to fix this typeerror?

In python 3.x, you can use a map to create a list.

usrs = []
usr = list(map(lambda x: x*x, [1,2,3]))
usrs.append(np.asarray(usr, dtype=np.int32))
print(usrs)

Run this code, you will get:

[array([1, 4, 9])]

This error is fixed.

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