03 辅助函数三

　　返回结构化数据

1 def ajaxReturn(info,data={}):
2     import json
3     info[‘data‘] = data
4     return json.dumps(info)

　　递归tree

1 def get_tree(data,pid=0,level=0):
2     data_list = []
3     for info in data:
4         if info[‘pid‘] == pid:
5             info[‘level‘] = level
6             info[‘name‘] = ‘^-^ ‘*level +  info[‘name‘]
7             data_list.append(info)
8             data_list += get_tree(data, info[‘id‘], level + 1)
9     return data_list

　　获取总页数

1 def get_total_page(total):
2     from flask import current_app
3     import math
4     try:
5         pagesize = current_app.config[‘PAGESIZE‘]
6     except:
7         pagesize = 5
8     return math.ceil(total/pagesize)

　　分页试图函数

 1 def getHtmlPage(page=1,url=‘‘,total=0):
 2     ‘‘‘
 3     * 获取分页的html内容
 4     * url 跳转链接
 5     * total 总条数
 6     * p = 起始页码
 7     ‘‘‘
 8     from flask import current_app
 9     import math
10     try:
11         pagesize = current_app.config[‘PAGESIZE‘]
12     except:
13         pagesize = 5
14     # 总页数
15     pages = math.ceil(total/pagesize)
16     # 最多显示10个页码
17     _pageNum = 10
18     # 如果当前页面小于1 则为1，否则就是其值
19     page = 1 if page < 1 else page
20     # 如果当前页数大于总数页数，则为总页数 否则为其页数
21     page = pages if page > pages else page
22     # 总页数小于当前页 则为当前页
23     pages = page if pages < page else pages
24
25     # 计算开始页
26     _start = page - math.floor(_pageNum/2)
27     _start = 1 if _start < 1 else _start
28
29     # 计算结束页
30     _end = page + math.floor(_pageNum/2)
31     _end = pages if _end > pages else _end
32
33     # 显示当前的页码数
34     _currentPageNum = _end - _start + 1
35
36     # 如果当前页码数不够最大页码数，左右调整
37     # 左调整
38     if _currentPageNum < _pageNum and _start > 1 :
39         _start = _start - (_pageNum - _currentPageNum)
40         _start = 1 if _start < 1 else _start
41         _currentPageNum = _end - _start + 1
42
43     # 右调整
44     if _currentPageNum < _pageNum and _end < pages:
45         _end = _end + (_pageNum - _currentPageNum)
46         _end = pages if _end > pages else _end
47
48     # 嵌套html
49     _pageHtml = ‘<div class="dataTables_paginate paging_bootstrap"><ul class="pagination">‘
50     if page > 1 :
51         _pageHtml += ‘<li><a  class="prev" title="上一页" href="‘+url+‘&page=‘+str(page - 1)+‘">«</a></li>‘
52     for i in range(_start,_end+1):
53         if i == page:
54             _pageHtml += ‘<li><a class="active btn-info white">‘+ str(i) +‘</a></li>‘
55         else:
56             _pageHtml += ‘<li><a href="‘ +url+ ‘&page=‘ +str(i)+ ‘">‘ +str(i)+ ‘</a></li>‘;
57     if page < _end :
58         _pageHtml += ‘<li><a class="next" title="下一页" href="‘+ url + ‘&page=‘+str(page + 1)+‘">»</a></li>‘;
59     if total < 1 :
60         _pageHtml += ‘<h4>暂无数据...</h4>‘
61     _pageHtml += "</ul></div>"
62     # 返回值
63     return ‘‘ if pages < 1 else _pageHtml

　　生成一个随机数，六位随机数，不到六位，前面补0

1 def getUUID(start=1,end=1000,length=6):
2     import random
3     randnum = str(random.randint(start,end))
4     if len(randnum) < length :
5         randnum = randnum.zfill(length)
6     return randnum

　　去除首尾空格和特殊符号

1 def xss_clean(raw,flag=‘‘):
2     if flag == ‘Integer‘:
3         xraw = int(raw.strip()) if raw else 0
4     else:
5         xraw = raw.strip().replace(‘<‘, ‘&lt;‘).replace(‘>‘, ‘&gt;‘) if raw else ‘‘
6     return xraw

　　获取菜单函数

1 def getMenu(data,pid=0,deep=0):
2     tree = []
3     for row in data:
4         if row[‘pid‘] == pid:
5             row[‘deep‘] = deep
6             row[‘child‘] = getMenu(data,row[‘id‘],deep+1)
7             tree.append(row)
8     return tree

　　存储上传图片

 1 def save_images(images):
 2     from datetime import datetime
 3     import random
 4     pics_url = [] # 图片存储路径
 5     dir = ‘app/static/images/questions/{}/‘
 6     for image in images:
 7         try:
 8             ext = ‘.‘+image.filename.rsplit(‘.‘, 1)[1]
 9         except:
10             ext = ‘.png‘
11         path = dir.format(datetime.now().strftime(‘%Y-%m-%d‘))
12         filename = datetime.now().strftime(‘%d%H%M%S‘) + ‘-‘ + str(random.randint(10000, 99999)) + ext
13         dir_exists(path) # 检查文件夹是否创建，若未创建，则创建
14         pics = path + filename
15         with open(pics,‘wb‘) as fp:
16             fp.write(image.read())
17         pics_url.append(filename)
18     return ‘;‘.join(pics_url)

原文地址：https://www.cnblogs.com/a2534786642/p/11040680.html