It is necessary to write a script. The database has a mobile phone number for testing. After registration, there will be a lot of related data in the database. Then the script needs to be able to clear these data or set them to null. This is a similar script. How should I modify it?

future import print_functionimport itertools
import pymysql.cursors
import csv

name == '__main__':sg_connection = pymysql.connect(
host='localhost',
user='root',
password=' root',
db='sellergrowth',
charset='utf8',
cursorclass=pymysql.cursors.DictCursor
)

host='localhost',
user='root',
password='root',
db='sguc',
charset= 'utf8',
cursorclass=pymysql.cursors.DictCursor
)

if not entity['username']:
return False
if entity['telephone'] and not is_telephone(entity['telephone']):
return False
if entity['email'] and not is_email(entity['email']):
return False
if not (
(entity['telephone'] and entity[' telephone_verified']) or (entity['email'] and entity['email_verified'])):
return False
return True

def _set_blank_to_none(name):
if not entity[name]:
entity[name] = None

_set_blank_to_none('email')
if entity['telephone'] and not entity['telephone_verified']:
entity['telephone'] = None
if entity['email'] and not entity['email_verified']:
entity['email'] = None
_set_blank_to_none('password')
_set_blank_to_none('wechat_unionid')
_set_blank_to_none ('wechat_app_openid')
_set_blank_to_none('wechat_public_openid')
_set_blank_to_none('wechat_site_openid')
_set_blank_to_none('qq_openid')
_set_blank_to_none('last_login')
_set_blank_to_none('sign_url' )
_set_blank_to_none('user_uuid')
if not entity['signup_service_id']:
entity['signup_service_id'] = 11300
if entity['signup_method'] == 1:
entity ['signup_method'] = 'MOBILE'
elif entity['signup_method'] == 2:
entity['signup_method'] = 'TABLET'
elif entity['signup_method'] == 3:
entity['signup_method'] = 'WE_CHAT_PUBLIC'
elif entity['signup_method'] == 4:
entity['signup_method'] = 'WE_CHAT_SITE'
elif entity['signup_method'] == 12:
entity['signup_method'] = 'WE_CHAT_APP'
elif entity['signup_method'] == 6:
entity['signup_method'] = 'QQ_WEB'
elif entity[ 'signup_method'] == 7:
entity['signup_method'] = 'QQ_WEBAPP'
else:
entity['signup_method'] = None
entity['is_active'] = 1 if entity ['is_active'] else 0
return entity

def _dict_to_tuple(entity):
return tuple((
entity['telephone'], entity['email'], entity['username'], entity['password'], entity['wechat_unionid'],
entity['wechat_app_openid'],
entity['wechat_public_openid'], entity['wechat_site_openid'], entity['qq_openid'],
int(entity['signup_service_id']), entity['date_joined'], entity['last_login'], entity['is_active'],
entity['signup_method'], entity['sign_url'], entity['user_uuid']
))

try:
with sg_connection.cursor() as cursor, uc_connection.cursor() as uc_cursor:
sql = 'SELECT is_active, p.telephone, email, username, password, p.wechat_unionid, p.wechat_app_openid, p.wechat_public_openid, p.wechat_site_openid, p.qq_openid, p.signup_service_id, p.telephone_verified, p.email_verified, date_joined, last_login, p.signup_method, e.sign_url, p2.user_uuid FROM account_profile p LEFT JOIN event_baseevent e ON e.id=p.signup_event_id LEFT JOIN account_profile p2 ON p2.user_id=p.inviter_id, auth_user u WHERE p.user_id=u.id'
cursor.execute(sql)
cursor, cursor_for_record = itertools.tee(cursor)
cursor = itertools.ifilter(_filter_valid, cursor)
cursor = itertools.imap(_map_to_correct, cursor)
cursor = itertools.imap(_dict_to_tuple, cursor)

sql = 'INSERT into cas_service (service_id, service_group) VALUES (%s, %s)'
service_list = ((11300, 'SG'), (12300, 'SGASK'), (13300, 'YQSXY'), (14300, 'CHUANGLAN'))
uc_cursor.executemany(sql, service_list)
uc_connection.commit()

insert_sql = 'INSERT into cas_user (phone, email, username1, password1, wechat_unionid, wechat_app_openid, wechat_public_openid, wechat_site_openid, qq_openid, sign_up_service_id, date_joined, last_login, is_active, sign_up_device, sg_event_url, sg_inviter_uid) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)'
uc_cursor.executemany(insert_sql, list(cursor))
uc_connection.commit()

with open('not_migration_report.csv', 'wb') as csvfile:
spamwriter = csv.writer(csvfile, delimiter=',', quotechar='|', quoting=csv.QUOTE_MINIMAL)
init = False
cursor_for_record = itertools.ifilterfalse(_filter_valid, cursor_for_record)
for i in cursor_for_record:
if not init:
init = True
print(i.keys())
spamwriter.writerow(
[a.encode("utf8") if type(a) == unicode else a for a in i.values()])
finally:
sg_connection.close()
uc_connection.close()