使用 NumPy 中的比较运算符对两个字符串数组进行逐元素比较


要使用比较运算符对两个字符串数组进行逐元素比较,请在 Python NumPy 中使用 **numpy.compare_chararrays()** 方法。arr1 和 arr2 是要比较的形状相同的两个输入字符串数组。第三个参数是 rstrip,如果为 True,则在比较之前会删除字符串末尾的空格。

NumPy 提供全面的数学函数、随机数生成器、线性代数例程、傅里叶变换等等。它支持各种硬件和计算平台,并且与分布式、GPU 和稀疏数组库兼容良好。

步骤

首先,导入所需的库:

import numpy as np

创建两个一维字符串数组:

arr1 = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad', 'aaa'])
arr2 = np.array(['Cio', 'Tom', 'Cena', 'Kate', 'Adams', 'brad', 'aa'])

显示数组:

print("Array 1...
", arr1) print("
Array 2...
", arr2)

获取数组的类型:

print("
Our Array 1 type...
", arr1.dtype) print("
Our Array 2 type...
", arr2.dtype)

获取数组的维度:

print("
Our Array 1 Dimensions...
",arr1.ndim) print("
Our Array 2 Dimensions...
",arr2.ndim)

获取数组的形状:

print("
Our Array 1 Shape...
",arr1.shape) print("
Our Array 2 Shape...
",arr2.shape)

要使用比较运算符对两个字符串数组进行逐元素比较,请使用 numpy.compare_chararrays() 方法。arr1 和 arr2 是要比较的形状相同的两个输入字符串数组。第三个参数是 rstrip,如果为 True,则在比较之前会删除字符串末尾的空格:

print("
Result...
",np.compare_chararrays(arr1, arr2, ">", rstrip = True))

示例

import numpy as np

# Create two One-Dimensional arrays of string
arr1 = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad', 'aaa'])
arr2 = np.array(['Cio', 'Tom', 'Cena', 'Kate', 'Adams', 'brad', 'aa'])

# Display the arrays
print("Array 1...
", arr1) print("
Array 2...
", arr2) # Get the type of the arrays print("
Our Array 1 type...
", arr1.dtype) print("
Our Array 2 type...
", arr2.dtype) # Get the dimensions of the Arrays print("
Our Array 1 Dimensions...
",arr1.ndim) print("
Our Array 2 Dimensions...
",arr2.ndim) # Get the shape of the Arrays print("
Our Array 1 Shape...
",arr1.shape) print("
Our Array 2 Shape...
",arr2.shape) # To perform element-wise comparison of two string arrays using a comparison operator, use the numpy.compare_chararrays() method in Python Numpy # The arr1 and arr2 are the two input string arrays of the same shape to be compared # The 3rd parameter is rstrip , if True, the spaces at the end of Strings are removed before the comparison. print("
Result...
",np.compare_chararrays(arr1, arr2, ">", rstrip = True))

输出

Array 1...
['Bella' 'Tom' 'John' 'Kate' 'Amy' 'Brad' 'aaa']

Array 2...
['Cio' 'Tom' 'Cena' 'Kate' 'Adams' 'brad' 'aa']

Our Array 1 type...
<U5

Our Array 2 type...
<U5

Our Array 1 Dimensions...
1

Our Array 2 Dimensions...
1

Our Array 1 Shape...
(7,)

Our Array 2 Shape...
(7,)

Result...
[False False True False True False True]

更新于:2022年2月7日

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