ModuleNotFoundError: No module named 'requests_html'

requests-html is not installed where your script runs. The PyPI name is requests-html (with a dash) but the import is requests_html (with an underscore). Run python -m pip install requests-html and the import works.

The error

ModuleNotFoundError: No module named 'requests_html'

Fix it

1. Install requests-html

python -m pip install requests-html

Expected: Successfully installed requests-html-... plus its dependencies.

2. Confirm

python -c "from requests_html import HTMLSession; print('ok')"

Expected: prints ok.

When this applies

• any from requests_html import ... fails naming requests_html
• a fresh env following a tutorial

When it does NOT apply

• cannot import name 'search' from 'parse' means requests-html IS installed but its dependency broke
• the lxmlhtmlclean ImportError is the lxml 5.2 split

Compatibility

requests-html 0.10.x. Note the project is unmaintained since 2021, so expect dependency friction on modern Python (the parse and lxml skills in this set cover the two big ones).

Why it happens

The distribution name uses a dash (requests-html) while the import uses an underscore (requests_html). People who guess the pip name from the import name (pip install requests_html) get nothing, and people who skip the install get this ModuleNotFoundError.

Edge cases

• pip install requests_html (underscore) fails outright on PyPI. The dash form is the only one that exists.
• Because the project is unmaintained, a fresh install on Python 3.12+ may immediately hit the parse or lxml_html_clean errors. Those have their own fixes.