## Build a Docker Image for FastAPI

Okay, let's build something now! 🚀

I'll show you how to build a **Docker image** for FastAPI **from scratch**, based on the **official Python** image.

This is what you would want to do in **most cases**, for example:

* Using **Kubernetes** or similar tools
* When running on a **Raspberry Pi**

	return p.ctxt.PosTable.XPos(src.MakePos(p.lex.Base(), uint(p.lineNum), 0))
}

func (p *Parser) Parse() (*obj.Prog, bool) {
	scratch := make([][]lex.Token, 0, 3)
	for {
		word, cond, operands, ok := p.line(scratch)
		if !ok {
			break
		}
		scratch = operands

		if p.pseudo(word, operands) {
			continue
		}
		i, present := p.arch.Instructions[word]
		if present {

                                     StringPiece* result, char* scratch) const {
  if (ops_->read == nullptr)
    return errors::Unimplemented(
        tensorflow::strings::StrCat("Read() not implemented for ", filename_));

  UniquePtrTo_TF_Status plugin_status(TF_NewStatus(), TF_DeleteStatus);
  int64_t read =
      ops_->read(file_.get(), offset, n, scratch, plugin_status.get());
  if (read > 0) *result = StringPiece(scratch, read);

  - author: Sebastián Ramírez (tiangolo)
    author_link: https://twitter.com/tiangolo
    link: https://dev.to/tiangolo/build-a-web-api-from-scratch-with-fastapi-the-workshop-2ehe
    title: Build a web API from scratch with FastAPI - the workshop
  - author: Paul Sec
    author_link: https://twitter.com/PaulWebSec
    link: https://paulsec.github.io/posts/fastapi_plus_zeit_serverless_fu/

        try {
            return connect(loc);
        }
        catch ( UnknownHostException uhe ) {
            throw new SmbException("Failed to connect to server", uhe);
        }
        catch ( SmbException se ) {
            throw se;
        }
        catch ( IOException ioe ) {
            throw new SmbException("Failed to connect to server", ioe);
        }
    }

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial001.py!}
```

### Edit it

It's a very simple program.

But now imagine that you were writing it from scratch.

At some point you would have started the definition of the function, you had the parameters ready...

But then you have to call "that method that converts the first letter to upper case".

    The examples here are no longer tested in CI (as they were before).

If you are starting a project from scratch, you are probably better off with SQLAlchemy ORM ([SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank}), or any other async ORM.

    try {
      throwIfUnchecked(new SomeUncheckedException());
      fail();
    } catch (SomeUncheckedException expected) {
    }
  }

  public void testThrowIfUnchecked_Error() {
    try {
      throwIfUnchecked(new SomeError());
      fail();
    } catch (SomeError expected) {
    }
  }

  @SuppressWarnings("ThrowIfUncheckedKnownChecked")

    try {
      throwIfUnchecked(new SomeUncheckedException());
      fail();
    } catch (SomeUncheckedException expected) {
    }
  }

  public void testThrowIfUnchecked_Error() {
    try {
      throwIfUnchecked(new SomeError());
      fail();
    } catch (SomeError expected) {
    }
  }

  @SuppressWarnings("ThrowIfUncheckedKnownChecked")

      fail("no exception thrown");
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testCheckArgument_simpleMessage_success() {
    Preconditions.checkArgument(true, IGNORE_ME);
  }

  public void testCheckArgument_simpleMessage_failure() {
    try {
      Preconditions.checkArgument(false, new Message());
      fail("no exception thrown");
    } catch (IllegalArgumentException expected) {