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+# Frequently Asked Questions
+
+The most common questions and issues users face are aggregated to this FAQ.
+
+```{contents}
+:local:
+:backlinks: none
+```
+
+## Does Black have an API?
+
+Not yet. _Black_ is fundamentally a command line tool. Many
+[integrations](integrations/index.rst) are provided, but a Python interface is not one
+of them. A simple API is being [planned](https://github.com/psf/black/issues/779)
+though.
+
+## Is Black safe to use?
+
+Yes, for the most part. _Black_ is strictly about formatting, nothing else. But because
+_Black_ is still in [beta](index.rst), some edges are still a bit rough. To combat
+issues, the equivalence of code after formatting is
+[checked](the_black_code_style/current_style.md#ast-before-and-after-formatting) with
+limited special cases where the code is allowed to differ. If issues are found, an error
+is raised and the file is left untouched. Magical comments that influence linters and
+other tools, such as `# noqa`, may be moved by _Black_. See below for more details.
+
+## How stable is Black's style?
+
+Quite stable. _Black_ aims to enforce one style and one style only, with some room for
+pragmatism. However, _Black_ is still in beta so style changes are both planned and
+still proposed on the issue tracker. See
+[The Black Code Style](the_black_code_style/index.rst) for more details.
+
+## Why is my file not formatted?
+
+Most likely because it is ignored in `.gitignore` or excluded with configuration. See
+[file collection and discovery](usage_and_configuration/file_collection_and_discovery.md)
+for details.
+
+## Why is my Jupyter Notebook cell not formatted?
+
+_Black_ is timid about formatting Jupyter Notebooks. Cells containing any of the
+following will not be formatted:
+
+- automagics (e.g. `pip install black`)
+- multiline magics, e.g.:
+
+  ```python
+  %timeit f(1, \
+          2, \
+          3)
+  ```
+
+- code which `IPython`'s `TransformerManager` would transform magics into, e.g.:
+
+  ```python
+  get_ipython().system('ls')
+  ```
+
+- invalid syntax, as it can't be safely distinguished from automagics in the absence of
+  a running `IPython` kernel.
+
+## Why are Flake8's E203 and W503 violated?
+
+Because they go against PEP 8. E203 falsely triggers on list
+[slices](the_black_code_style/current_style.md#slices), and adhering to W503 hinders
+readability because operators are misaligned. Disable W503 and enable the
+disabled-by-default counterpart W504. E203 should be disabled while changes are still
+[discussed](https://github.com/PyCQA/pycodestyle/issues/373).
+
+## Does Black support Python 2?
+
+For formatting, yes! [Install](getting_started.md#installation) with the `python2` extra
+to format Python 2 files too! There are no current plans to drop support, but most
+likely it is bound to happen. Sometime. Eventually. In terms of running _Black_ though,
+Python 3.6 or newer is required.
+
+## Why does my linter or typechecker complain after I format my code?
+
+Some linters and other tools use magical comments (e.g., `# noqa`, `# type: ignore`) to
+influence their behavior. While Black does its best to recognize such comments and leave
+them in the right place, this detection is not and cannot be perfect. Therefore, you'll
+sometimes have to manually move these comments to the right place after you format your
+codebase with _Black_.