先决条件
这边的程序相对比较简单，就不像之前一样画流程图了。一下介绍一下我们需要的python 模块：
| 模块名 | 版本 | 其他 |
| mysql-connector | 2.1.3 | MySQL官网的python链接模块 |
| xlwt | 1.0.0 | 生成excel模块 |
程序展示
- 主程序
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if __name__ == ‘__main__’:
info = {
‘host’ :‘192.168.137.11’,
‘user’ :‘root’,
‘password’:‘root’,
‘database’:‘test’
}
conn = mysql.connector.connect(**info)
cursor = conn.cursor()
sql = get_sql()
cursor.execute(sql)
# 获得excel的title
title = get_title(cursor)
# 获得需要的数据
data = get_select_data(cursor)
# 获得每一列的最大长度
max_len = get_col_max_length(data, title)
work_book = xlwt.Workbook(encoding=‘utf-8’)
# 创建一个excel模板
work_sheet = work_book.add_sheet(‘查询数据’)
# 生成excel title
work_sheet = create_excel_title(work_sheet, title, title_style)
# 生成 excel 数据
work_sheet = create_excel_body(work_sheet, data)
# 设置每一列适当的长度
work_sheet = set_work_sheet_col_len(work_sheet, max_len)
# 保存 excel
work_book.save(‘data_{time}.xls’.format(time=time.time()))
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- 获得的sql方法
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def get_sql():
”‘
创建需要的sql语句
‘”
sql = ”‘
SELECT tmp.mobile_phone AS ‘电话号码‘,
tmp.name AS ‘其中一个姓名‘,
tmall_shop_info.name AS ‘品牌商名称‘,
store.store_name AS ‘店铺名称‘,
tmp.num AS ‘重复个数‘
FROM (
SELECT mobile_phone,
name,
store_no,
tmall_shop_id,
COUNT(*) AS num
FROM store_guide
WHERE mobile_phone IS NOT NULL
GROUP BY mobile_phone
HAVING num > 1
) AS tmp
LEFT JOIN tmall_shop_info USING(tmall_shop_id)
LEFT JOIN store USING(store_no)
‘”
return sql
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如果需要生成其他sql能查询出的数据直接就替换掉上面的sql就好了。
- 其他方法
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def get_title(cursor):
”‘
通过游标获得excel文件title
‘”
return cursor.column_names
def get_select_data(cursor):
”‘
通过游标获得数据列表(list)
‘”
return [row for row in cursor]
def create_excel_title(work_sheet, title, title_style=None):
”‘
生产exceltitle
‘”
if not title_style:
title_style = default_style
for col_index, col_name in enumerate(title):
work_sheet.write(0, col_index, col_name, title_style)
return work_sheet
def create_excel_body(work_sheet, body, body_style=None):
”‘
生成excel body信息
‘”
if not title_style:
body_style = default_style
for row_num, row_data in enumerate(data, 1):
for col_index, col_value in enumerate(row_data):
work_sheet.write(row_num, col_index, col_value)
return work_sheet
def get_col_max_length(data, title):
”‘
获得数据每列最大值长度
‘”
col_len = map(len, map(str, title))
func = lambda x, y: y if y>x else x
for row in data:
row_len = map(len, map(str, row))
col_len = map(func, col_len, row_len)
return col_len
def set_work_sheet_col_len(work_sheet, max_len):
”‘
设置列长度
‘”
for col, len in enumerate(max_len):
work_sheet.col(col).width = 256 * (len + 1)
return work_sheet
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以上的get_col_max_length方法中使用了map函数来获得每一列的最大长度是多少，为了能在excel中能设置适当的宽度。
- excel样式设置
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# 默认样式
default_style = xlwt.easyxf(”‘
pattern: pattern solid;
borders: left 1, right 1, top 1, bottom 1;
align: horiz center’”,
num_format_str=‘0,000.00’)
# 标题栏样式
title_style = xlwt.easyxf(”‘
pattern: pattern solid, fore_colour yellow;
font: name Times New Roman, color-index black, bold on;
borders: left 1, right 1, top 1, bottom 1;
align: horiz center’”,
num_format_str=‘0,000.00’)
# 时间格式样式
time_style = xlwt.easyxf(num_format_str=‘YYYY-MM-DD h:mm:ss’)
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