Chromedriver only supports characters in the BMP error while sending Emoji with ChromeDriver Chrome using Selenium Python to Tkinter's label() textbox

问题

I am automating whatsapp messages and would like to send them out through a tkinter window. In this tkinter window I have created a message box with the help of .label() and I am able to connect to whatsapp web through selenium.

Currently, I am able to send out messages already, but without emojis. When I include emojis, I get this error "Chromedriver only supports characters in the BMP". How can I include emojis?

回答1:

This error message...

selenium.common.exceptions.WebDriverException: Message: unknown error: ChromeDriver only supports characters in the BMP

...implies that the ChromeDriver was unable to send the emoji signal through send_keys() method.

ChromeDriver only supports characters in the BMP is a known issue with Chromium team as ChromeDriver still doesn't support characters with a Unicode after FFFF. Hence it is impossible to send any character beyond FFFF via ChromeDriver. As a result any attempt to send SMP characters (e.g. CJK, Emojis, Symbols, etc) raises the error.

Alternative

A potential alternative would be to use GeckoDriver / Firefox.

Code Block:

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Firefox(executable_path=r'C:\Utility\BrowserDrivers\geckodriver.exe')
driver.get('https://www.google.com/')
# Chineese Character
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.NAME, "q"))).send_keys("𠀀")
# Emoji Character
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.NAME, "q"))).send_keys("💩")

Browser Snapshot:

You can find a relevant discussion in OpenQA.Selenium.WebDriverException: 'unknown error: ChromeDriver only supports characters in the BMP while sending an emoji through C# Selenium