如何解决错误：for i in range(len(val)): TypeError: object of type 'NoneType' has no len() ，这可能很傻

Question

in my project i have to send a numpy board in Instagram dm , sendMessage() funtion works fine i can send str message but can not send that i have created by numpy , please help me

THANKS in advance

My Code

from time import sleep
import numpy as np
from selenium import webdriver
from selenium.webdriver.common.keys import Keys

options = webdriver.ChromeOptions()
options.add_argument("user-data-dir=C:\\Users\\saksh\\Desktop\\codeing\\Projects\\Connect 4\\chrome profiles\\chrome profile - 1")
browser = webdriver.Chrome(options =  options , executable_path = r"C:\Users\saksh\Desktop\codeing\imported items\chromedriver v-90.exe")


ROW_COUNT = 6
COLUMN_COUNT = 7

def create_board():
    board = np.zeros((ROW_COUNT, COLUMN_COUNT))

    return board


def send_board(board):
    board = str(np.flip(board, 0))
    board  = board.replace("0", "🔳")
    board = board.replace("1", "🟢")
    board =  board.replace("2", "⚫")
    

board = create_board()


def sendMessage(message , browser):
    message_box = browser.find_element_by_css_selector(".ItkAi > textarea:nth-child(1)")
    message_box.send_keys(message)
    message_box.Keys.ENTER 

# manually go u any instagram dm 
# manually go u any instagram dm 
print("manually go u any instagram dm , and press enter") 

input("press enter !!")

sleep(5)

sendMessage(send_board(board) , browser)

ERROR

raceback (most recent call last): File "c:\\Users\\saksh\\Desktop\\codeing\\Projects\\Connect 4\\temp1.py", line 46, in sendMessage(send_board(board) , browser) File "c:\\Users\\saksh\\Desktop\\codeing\\Projects\\Connect 4\\temp1.py", line 35, in sendMessage message_box.send_keys(message) File "C:\\Users\\saksh\\AppData\\Local\\Programs\\Python\\Python39\\lib\\site-packages\\selenium\\webdriver\\remote\\webelement.py", line 478, in send_keys {'text': "".join(keys_to_typing(value)), File "C:\\Users\\saksh\\AppData\\Local\\Programs\\Python\\Python39\\lib\\site-packages\\selenium\\webdriver\\common\\utils.py", line 150, in keys_to_typing for i in range(len(val)): TypeError: object of type 'NoneType' has no len()

Answer 1

From the error trace it's quite clear that in this block

def sendMessage(message , browser):
    message_box = browser.find_element_by_css_selector(".ItkAi > textarea:nth-child(1)")
    message_box.send_keys(message)
    message_box.Keys.ENTER 

This line

message_box.send_keys(message)

fails since the message is of NoneType .
That means that you passing there a NoneType object.
This is because you are calling this method by

sendMessage(send_board(board) , browser)

but the send_board method doesn't return a value / object.
So you actually send nothing, NoneType object to sendMessage method as a message to be inserted into the message_box element.