如何将 NumPy 数组设为只读？
原文:https://www . geesforgeks . org/how-to-make-a-numpy-array-只读/
我们来讨论一下如何让 NumPy 数组不可变，即不可重写或不可更改。这可以通过将 NumPy 数组的可写标志设置为 false 来实现。
语法:
array.flags.writable=False
这将可写标志设置为假，因此数组变成不可变的，即只读。请看下面的例子
例:
Python
import numpy as np
a = np.zeros(11)
print("Before any change ")
print(a)
a[1] = 2
print("Before after first change ")
print(a)
a.flags.writable = False
print("After making array immutable on attempting second change ")
a[1] = 7
输出:
Before any change
[0\. 0\. 0\. 0\. 0\. 0\. 0\. 0\. 0\. 0\. 0.]
Before after first change
[0\. 2\. 0\. 0\. 0\. 0\. 0\. 0\. 0\. 0\. 0.]
After making array immutable on attempting second change
Traceback (most recent call last):
File "gfg9.py", line 11, in <module>
a[1]=7
ValueError: assignment destination is read-only
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