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I'm trying to set up an AWS Lambda handler that involves using pyppeteer (the python-port of headless Chrome in node.js) to take a screenshot.

def getSavePath():
 path = "picture_.png".format(random.randint(100, 1000))
 loop = asyncio.get_event_loop()
 loop.run_until_complete(._screenshot(path))
 print("Done taking screenshot...")

 return path

async def _screenshot(path):
 browser = await launch()
 page = await browser.newPage()
 await page.goto(URL, "waitUntil": "networkidle0")

 textBox = await page.querySelector('[name="section"]')
 submitButton = await page.querySelector('#submit')
 canvas = await page.querySelector("#canvas")

 await textBox.click("clickCount": 3);
 await textBox.type(self.wkt)
 await submitButton.click()

 await canvas.screenshot('path': path)
 await browser.close()

When I run this locally, the screenshot gets taken and the path gets returned correctly.

When I run this on AWS Lambda, I'm getting:

 loop.run_until_complete(._screenshot(path))
 File "/var/task/asyncio/base_events.py", line 296, in run_until_complete
 future = tasks.async(future, loop=self)
 File "/var/task/asyncio/tasks.py", line 516, in async
 raise TypeError('A Future or coroutine is required')
TypeError: A Future or coroutine is required
/var/task/slash.py:50: RuntimeWarning: coroutine '_screenshot' was never awaited

Any thoughts on why this would work locally but not on Lambda?

I'm using Python version 3.6 both locally and on Lambda.