为何sed无法替换行末字符串？技术求助

Root Cause #

Your sed command targets .decode('utf-8') (with a hyphen), but the line you want to modify contains .decode('utf8') (without a hyphen). The pattern doesn’t match the actual text, so no changes are applied—this is why you see no error but no effect.

Corrected Command #

Use the exact string from the line in your sed substitution:

sed -i "3328s/.decode('utf8')//" /usr/local/lib/python3.6/site-packages/keras/engine/topology.py

Verify the Change #

Run this command to confirm the line is modified:

sed -n '3328p' /usr/local/lib/python3.6/site-packages/keras/engine/topology.py

You should see the updated line:

original_keras_version = f.attrs['keras_version']

Optional: Robust Pattern for Trailing Whitespace #

If the line has trailing spaces after .decode('utf8'), adjust the pattern to handle them:

sed -i "3328s/.decode('utf8')\s*//" /usr/local/lib/python3.6/site-packages/keras/engine/topology.py

The \s* matches zero or more whitespace characters, ensuring the substitution works regardless of trailing spaces.

内容的提问来源于stack exchange，提问作者Manolo Dominguez Becerra