docs: add python snippets for api classes (#5011)

Author: pavelfeldman

docs/src/api/class-accessibility.md

@@ -47,9 +47,8 @@ Captures the current state of the accessibility tree. The returned object repres
 page.
 
 :::note
-The Chromium accessibility tree contains nodes that go unused on most platforms and by most screen readers.
-Playwright will discard them as well for an easier to process tree, unless [`option: interestingOnly`] is set to
-`false`.
+The Chromium accessibility tree contains nodes that go unused on most platforms and by most screen readers. Playwright
+will discard them as well for an easier to process tree, unless [`option: interestingOnly`] is set to `false`.
 :::
 
 An example of dumping the entire accessibility tree:
@@ -59,6 +58,16 @@ const snapshot = await page.accessibility.snapshot();
 console.log(snapshot);
 ```
 
+```python async
+snapshot = await page.accessibility.snapshot()
+print(snapshot)
+```
+
+```python sync
+snapshot = page.accessibility.snapshot()
+print(snapshot)
+```
+
 An example of logging the focused node's name:
 
 ```js
@@ -77,6 +86,36 @@ function findFocusedNode(node) {
 }
 ```
 
+```python async
+def find_focused_node(node):
+    if (node.get("focused"))
+        return node
+    for child in (node.get("children") or []):
+        found_node = find_focused_node(child)
+        return found_node
+    return null
+
+snapshot = await page.accessibility.snapshot()
+node = find_focused_node(snapshot)
+if node:
+    print(node["name"]) 
+```
+
+```python sync
+def find_focused_node(node):
+    if (node.get("focused"))
+        return node
+    for child in (node.get("children") or []):
+        found_node = find_focused_node(child)
+        return found_node
+    return null
+
+snapshot = page.accessibility.snapshot()
+node = find_focused_node(snapshot)
+if node:
+    print(node["name"]) 
+```
+
 ### option: Accessibility.snapshot.interestingOnly
 - `interestingOnly` <[boolean]>
 

docs/src/api/class-browser.md

@@ -14,6 +14,37 @@ const { firefox } = require('playwright');  // Or 'chromium' or 'webkit'.
 })();
 ```
 
+```python async
+import asyncio
+from playwright.async_api import async_playwright
+
+async def run(playwright):
+    firefox = playwright.firefox
+    browser = await firefox.launch()
+    page = await browser.new_page()
+    await page.goto("https://example.com")
+    await browser.close()
+
+async def main():
+    async with async_playwright() as playwright:
+        await run(playwright)
+asyncio.run(main())
+```
+
+```python sync
+from playwright.sync_api import sync_playwright
+
+def run(playwright):
+    firefox = playwright.firefox
+    browser = firefox.launch()
+    page = browser.new_page()
+    page.goto("https://example.com")
+    browser.close()
+
+with sync_playwright() as playwright:
+    run(playwright)
+```
+
 ## event: Browser.disconnected
 
 Emitted when Browser gets disconnected from the browser application. This might happen because of one of the following:
@@ -25,8 +56,8 @@ Emitted when Browser gets disconnected from the browser application. This might
 In case this browser is obtained using [`method: BrowserType.launch`], closes the browser and all of its pages (if any
 were opened).
 
-In case this browser is connected to, clears all created contexts belonging to this
-browser and disconnects from the browser server.
+In case this browser is connected to, clears all created contexts belonging to this browser and disconnects from the
+browser server.
 
 The [Browser] object itself is considered to be disposed and cannot be used anymore.
 
@@ -43,6 +74,20 @@ const context = await browser.newContext();
 console.log(browser.contexts().length); // prints `1`
 ```
 
+```python async
+browser = await pw.webkit.launch()
+print(len(browser.contexts())) # prints `0`
+context = await browser.new_context()
+print(len(browser.contexts())) # prints `1`
+```
+
+```python sync
+browser = pw.webkit.launch()
+print(len(browser.contexts())) # prints `0`
+context = browser.new_context()
+print(len(browser.contexts())) # prints `1`
+```
+
 ## method: Browser.isConnected
 - returns: <[boolean]>
 
@@ -64,6 +109,24 @@ Creates a new browser context. It won't share cookies/cache with other browser c
 })();
 ```
 
+```python async
+    browser = await playwright.firefox.launch() # or "chromium" or "webkit".
+    # create a new incognito browser context.
+    context = await browser.new_context()
+    # create a new page in a pristine context.
+    page = await context.new_page()
+    await page.goto("https://example.com")
+```
+
+```python sync
+    browser = playwright.firefox.launch() # or "chromium" or "webkit".
+    # create a new incognito browser context.
+    context = browser.new_context()
+    # create a new page in a pristine context.
+    page = context.new_page()
+    page.goto("https://example.com")
+```
+
 ### option: Browser.newContext.-inline- = %%-shared-context-params-list-%%
 
 ### option: Browser.newContext.proxy = %%-context-option-proxy-%%
@@ -76,8 +139,8 @@ Creates a new browser context. It won't share cookies/cache with other browser c
 Creates a new page in a new browser context. Closing this page will close the context as well.
 
 This is a convenience API that should only be used for the single-page scenarios and short snippets. Production code and
-testing frameworks should explicitly create [`method: Browser.newContext`] followed by the [`method:
-BrowserContext.newPage`] to control their exact life times.
+testing frameworks should explicitly create [`method: Browser.newContext`] followed by the
+[`method: BrowserContext.newPage`] to control their exact life times.
 
 ### option: Browser.newPage.-inline- = %%-shared-context-params-list-%%