擅长:python、mysql、java
<p>不安装任何附加包的最简单方法是使用内置csv读取矩阵中的整个文件并替换所需的元素。你知道吗</p>
<p>下面的代码可以做到这一点:</p>
<pre><code>import csv
with open('test.csv', 'r') as in_file, open('test_out.csv', 'wb') as out_file:
data = [row for row in csv.reader(in_file)]
data[0][0] = 'new value'
writer = csv.writer(out_file)
writer.writerows(data)
</code></pre>