连接MySql时提示%d format: a number is required, not str

代码：

sql = "select * from appelementinfo"
coon = pymysql.connect(user='root', password='', db='autoplatform', port='3306', host='127.0.0.1', charset='utf8')
cursor = coon.cursor()

执行结果：

"D:\Program Files\Python38\python.exe" D:/pythonproject/python_learn/mysql_data.py
Traceback (most recent call last):
  File "D:/pythonproject/python_learn/mysql_data.py", line 16, in <module>
    read_sql()
  File "D:/pythonproject/python_learn/mysql_data.py", line 5, in read_sql
    coon = pymysql.connect(user='root', password='', db='autoplatform', port='3306', host='127.0.0.1', charset='utf8')
  File "D:\Program Files\Python38\lib\site-packages\pymysql\__init__.py", line 90, in Connect
    return Connection(*args, **kwargs)
  File "D:\Program Files\Python38\lib\site-packages\pymysql\connections.py", line 704, in __init__
    self.connect()
  File "D:\Program Files\Python38\lib\site-packages\pymysql\connections.py", line 964, in connect
    self.host_info = "socket %s:%d" % (self.host, self.port)
TypeError: %d format: a number is required, not str

Process finished with exit code 1

错误分析：

port字段格式转换错误，需要一个整型，但是传入了一个字符串

coon = pymysql.connect(user='root', password='', db='autoplatform', port=3306, host='127.0.0.1', charset='utf8')

再次执行未报错