break用法

break用法：循环的时候，循环一次即停止

import pymysql,xlwt

FI = pymysql.connect(
   host='*',user='root',passwd='*',
   port=*,db='z*',charset='utf8'
   #port必须写int类型，
   #charset这里必须写utf8
)
cur = FI.cursor() #建立游标
sql = '''select
case left(d.name,2) when 'DD' then '*' when 'DW' then '*' when 'ZN' then '*' when 'DL' then '*' WHEN 'HB' then '*' when 'ZH' then'*'  when 'DS' then '*' when 'XS' then '*' else '研发中心' end as 所属部门,
d.name as 项目,
b.realname,
 a.date,
 a.consumed as 工时,
 a.work
FROM zt_effort a
left join zt_user b on a.account=b.account
left join zt_dept c on b.dept=c.id
left join zt_project d on a.project=d.id
left join zt_task e on a.objectID=e.id
where c.id in (35,22,1)
and a.date >='20201226' and a.date <='20210625' and c.name='*' and a.consumed>0
and b.realname  in ('*)
and d.name not in  ('*')
ORDER BY d.name,a.date'''
cur.execute(sql)
book=xlwt.Workbook()
sheet = book.add_sheet('*')
fileds=[filed[0] for filed in cur.description]#获取字段表头
res = cur.fetchall()  #获取所有返回的结果
for col, filed in enumerate(fileds):
    # print(col, filed)
    sheet.write(0, col, filed)
# book.save('./user_info.xls')
n=1
for i in res:
    bm=i[0]
    bm=bm[0:4]
    if bm=='*':
        for j in range(len(i)):
            sheet.write(n, j, i[j])
            print(n,j,i[j])
        # break
    n+=1
book.save(r'C:UserszzDesktop11.xls')