Python |检查 numpy 中的所有值是否为零
原文:https://www . geesforgeks . org/python-检查 numpy 中的所有值是否为零/
给定一个 numpy 数组，任务是检查 numpy 数组是否包含全零。让我们讨论几个解决上述任务的方法。 方法#1: 使用 numpy.count _ 非零() 获取零的计数
蟒蛇 3
# Python code to demonstrate
# to count the number of elements
# in numpy which are zero
import numpy as np
ini_array1 = np.array([1, 2, 3, 4, 5, 6, 0])
ini_array2 = np.array([0, 0, 0, 0, 0, 0])
# printing initial arrays
print("initial arrays", ini_array1)
print(ini_array2)
# code to find whether all elements are zero
countzero_in1 = np.count_nonzero(ini_array1)
countzero_in2 = np.count_nonzero(ini_array2)
# printing result
print("Number of non-zeroes in array1 : ", countzero_in1)
print("Number of non-zeroes in array2 : ", countzero_in2)
Output:
initial arrays [1 2 3 4 5 6 0]
[0 0 0 0 0 0]
Number of non-zeroes in array1 : 6
Number of non-zeroes in array2 : 0
方法 2: 使用 numpy.any()
蟒蛇 3
# Python code to check that whether
# all elements in numpy are zero
import numpy as np
ini_array1 = np.array([1, 2, 3, 4, 5, 6, 0])
ini_array2 = np.array([0, 0, 0, 0, 0, 0])
# printing initial arrays
print("initial arrays", ini_array1)
# code to find whether all elements are zero
countzero_in1 = not np.any(ini_array1)
countzero_in2 = not np.any(ini_array2)
# printing result
print("Whole array contains zeroes in array1 ?: ", countzero_in1)
print("Whole array contains zeroes in array2 ?: ", countzero_in2)
Output:
initial arrays [1 2 3 4 5 6 0]
Whole array contains zeroes in array1 ?: False
Whole array contains zeroes in array2 ?: True
