AttributeError: module 'pymysql' has no attribute 'connect'前一秒还能运行，然后就不行了
# 插入数据
import pymysql
db = pymysql.connect('localhost', 'root', 'root', 'dada')
cursor = db.cursor()
sql = "insert into py_user (name) values('hello');"
try:
cursor.execute(sql)
db.commit()
print("插入成功")
except:
print("插入失败")
db.rollback()
cursor.close()
db.close()
