### Pydantic v1 `regex` instead of `pattern`

Before Pydantic version 2 and before FastAPI 0.100.0, the parameter was called `regex` instead of `pattern`, but it's now deprecated.

You could still see some code using it:

=== "Python 3.10+ Pydantic v1"

    ```Python hl_lines="11"
    {!> ../../../docs_src/query_params_str_validations/tutorial004_an_py310_regex.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="7"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_py310.py!}
    ```

## 🚮 🥔 🧬

👆 💪 🔬 <abbr title="A regular expression, regex or regexp is a sequence of characters that define a search pattern for strings.">🥔 🧬</abbr> 👈 🔢 🔜 🏏:

=== "🐍 3️⃣.6️⃣ &amp; 🔛"

    ```Python hl_lines="11"

      cache.edit(key)
    }.also { expected ->
      assertThat(expected.message).isEqualTo("keys must match regex [a-z0-9_-]{1,120}: \"$key\"")
    }
    assertFailsWith<IllegalArgumentException> {
      key = "has_CR\r"
      cache.edit(key)
    }.also { expected ->
      assertThat(expected.message).isEqualTo("keys must match regex [a-z0-9_-]{1,120}: \"$key\"")
    }
    assertFailsWith<IllegalArgumentException> {

import org.jetbrains.kotlin.test.TestMetadata;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.util.regex.Pattern;

/** This class is generated by {@link org.jetbrains.kotlin.generators.tests.analysis.api.GenerateAnalysisApiTestsKt}. DO NOT MODIFY MANUALLY */
@SuppressWarnings("all")

tidy-docker:
	@docker image prune --all --force --filter="label=io.istio.repo=https://github.com/istio/tools" --filter="label!=io.istio.version=$(IMAGE_VERSION)"

# help works by looking over all Makefile includes matching `target: ## comment` regex and outputting them
help: ## Show this help
	@egrep -h '^[a-zA-Z_\.-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort  | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'

import org.jetbrains.kotlin.test.TestMetadata;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.util.regex.Pattern;

/** This class is generated by {@link org.jetbrains.kotlin.generators.tests.analysis.api.GenerateAnalysisApiTestsKt}. DO NOT MODIFY MANUALLY */
@SuppressWarnings("all")

import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.checkerframework.checker.nullness.qual.Nullable;

/**

import org.jetbrains.kotlin.test.TestMetadata;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.util.regex.Pattern;

/** This class is generated by {@link org.jetbrains.kotlin.generators.tests.analysis.api.GenerateAnalysisApiTestsKt}. DO NOT MODIFY MANUALLY */
@SuppressWarnings("all")

        if (p.startsWith(GsaConfigParser.REGEXP)) {
            return p.substring(GsaConfigParser.REGEXP.length());
        }

        if (p.startsWith(GsaConfigParser.REGEXP_CASE)) {
            return p.substring(GsaConfigParser.REGEXP_CASE.length());
        }

        if (p.startsWith(GsaConfigParser.REGEXP_IGNORE_CASE)) {
            return "(?i)" + p.substring(GsaConfigParser.REGEXP_IGNORE_CASE.length());
        }

        "includeAll": false,
        "multi": false,
        "name": "datasource",
        "options": [],
        "query": "prometheus",
        "queryValue": "",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "current": {
          "selected": false,
          "text": "details.default.svc.cluster.local",