据这里解释为文件名字和pymysql module名字重复了。麻蛋，原来还这么弱智。

Error

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='pymysql')
AttributeError: 'module' object has no attribute 'connect'
code

import pymysql

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='pymysql')

cur = conn.cursor()

cur.execute("SELECT Host,User FROM user")

print(cur.description)

print()

for row in cur:
   print(row)

cur.close()
conn.close()