擅长:python、mysql、java
<p>没有任何更改,因为您没有将其写回文件</p>
<pre><code>with open("testfisier", "r+") as file:
for line in file:
for index in range(len(line)):
if line[index] is "a":
replace_file = line[index].replace("a", "")
# Write the changes.
file.write(replace_file)
</code></pre>
<p>或:</p>
<pre><code>with open("testfisier", "r+") as f:
f.write(f.read().replace("a", ""))
</code></pre>