# Path Parameters and Numeric Validations

In the same way that you can declare more validations and metadata for query parameters with `Query`, you can declare the same type of validations and metadata for path parameters with `Path`.

## Import Path

First, import `Path` from `fastapi`, and import `Annotated`:

//// tab | Python 3.10+

```Python hl_lines="1  3"
{!> ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py!}
```

    <glob pattern="*.gnucash" />
  </mime-type>

  <mime-type type="application/x-gnumeric">
    <alias type="application/x-Gnumeric-spreadsheet"/>
    <magic priority="50">
      <match value="=&lt;gmr:Workbook" type="string" offset="39" />
    </magic>
    <glob pattern="*.gnumeric"/>
  </mime-type>

  <mime-type type="application/x-grib">
	 <acronym>GRIB</acronym>

var convertibleTypes = []reflect.Type{reflect.TypeOf(time.Time{}), reflect.TypeOf(false), reflect.TypeOf([]byte{})}

// RegEx matches only numeric values
var numericPlaceholderRe = regexp.MustCompile(`\$\d+\$`)

func isNumeric(k reflect.Kind) bool {
	switch k {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return true

		// updated.
		return nil
	}

	argVal := val
	if funcName != aggFnCount {
		// All aggregation functions, except COUNT require a
		// numeric argument.

		// Here, we diverge from Amazon S3 behavior by
		// inferring untyped values are numbers.
		if !argVal.isNumeric() {
			if i, ok := argVal.bytesToInt(); ok {
				argVal.setInt(i)
			} else if f, ok := argVal.bytesToFloat(); ok {
				argVal.setFloat(f)

		{"", []string{}, false},
		// Range cannot be negative.
		{":9000", []string{"/export1{-1...1}"}, false},
		// Range cannot start bigger than end.
		{":9000", []string{"/export1{64...1}"}, false},
		// Range can only be numeric.
		{":9000", []string{"/export1{a...z}"}, false},
		// Duplicate disks not allowed.
		{":9000", []string{"/export1{1...32}", "/export1{1...32}"}, false},

	lval, lerr := e.Left.evalNode(r, tableAlias)
	if lerr != nil || len(e.Right) == 0 {
		return lval, lerr
	}

	// Process remaining child nodes - result must be
	// numeric. This AST node is for terms separated by + or -
	// symbols.
	for _, rightTerm := range e.Right {
		op := rightTerm.Op
		rval, rerr := rightTerm.Right.evalNode(r, tableAlias)
		if rerr != nil {
			return nil, rerr

Sebastián Ramírez <******@****.***> 1728247014 +0200

Sebastián Ramírez <******@****.***> 1728247014 +0200

constraints.Required.message                = {item} is required.
constraints.TypeInteger.message             = {item} should be numeric.
constraints.TypeLong.message                = {item} should be numeric.
constraints.TypeFloat.message               = {item} should be numeric.
constraints.TypeDouble.message              = {item} should be numeric.
constraints.TypeAny.message                 = {item} cannot convert as {propertyType}.

constraints.Required.message                = {item} is required.
constraints.TypeInteger.message             = {item} should be numeric.
constraints.TypeLong.message                = {item} should be numeric.
constraints.TypeFloat.message               = {item} should be numeric.
constraints.TypeDouble.message              = {item} should be numeric.
constraints.TypeAny.message                 = {item} cannot convert as {propertyType}.