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python中的KMeans（framework = django）

我想在Django中使用KMeans ...我的代码是：

from django.db import models
from django.utils import timezone

import sys

from sklearn.cluster import KMeans
from sklearn.metrics import pairwise_distances_argmin_min
# Create your models here.

class tabla (models.Model):
    nombre = models.CharField(max_length=35)
    comida = models.PositiveSmallIntegerField()
    cantidad = models.PositiveSmallIntegerField()
    edad = models.PositiveSmallIntegerField()
    fecha_publicacion = models.DateTimeField(auto_now_add = True)

    def datos(self):
        cadena="hola, {0}, {1}, {2}, {3}, {4}"
        cadena2="{0} {1} {2}"
        cadena2.format(self.cantidad,self.comida,self.edad)

        #return cadena.format(self.nombre, self.comida,self.cantidad,self.edad,self.fecha_publicacion)
        kmeans = KMeans(n_clusters=3).fit(cadena2)
        centroids = kmeans.cluster_centers_
        return centroids

    def __str__(self):
        return self.datos()

和..我的结果是：哦，我的问题是...怎么了？

C:\TrabajoIA>python manage.py runserver
C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\externals\joblib\externals\cloudpickle\cloudpickle.py:47: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\externals\joblib\externals\cloudpickle\cloudpickle.py:47: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
Performing system checks...

System check identified no issues (0 silenced).
December 17, 2018 - 04:46:40
Django version 2.1.3, using settings 'TrabajoIA.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\externals\joblib\externals\cloudpickle\cloudpickle.py:47: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
Performing system checks...

System check identified no issues (0 silenced).
December 17, 2018 - 04:50:53
Django version 2.1.3, using settings 'TrabajoIA.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
Internal Server Error: /admin/Gestion/tabla/
Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\models\options.py", line 564, in get_field
    return self.fields_map[field_name]
KeyError: '__str__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 278, in lookup_field
    f = _get_non_gfk_field(opts, name)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 309, in _get_non_gfk_field
    field = opts.get_field(name)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\models\options.py", line 566, in get_field
    raise FieldDoesNotExist("%s has no field named '%s'" % (self.object_name, field_name))
django.core.exceptions.FieldDoesNotExist: tabla has no field named '__str__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\base.py", line 156, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\base.py", line 154, in _get_response
    response = response.render()
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\response.py", line 106, in render
    self.content = self.rendered_content
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\response.py", line 83, in rendered_content
    content = template.render(context, self._request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\backends\django.py", line 61, in render
    return self.template.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 171, in render
    return self._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\base.py", line 33, in render
    return super().render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\library.py", line 214, in render
    _dict = self.func(*resolved_args, **resolved_kwargs)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 341, in result_list
    'results': list(results(cl))}
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 318, in results
    yield ResultList(None, items_for_result(cl, res, None))
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 309, in __init__
    super().__init__(*items)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 228, in items_for_result
    f, attr, value = lookup_field(field_name, result, cl.model_admin)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 291, in lookup_field
    value = attr()
  File "C:\TrabajoIA\TrabajoIA\Apps\Gestion\models.py", line 28, in __str__
    return self.datos()
  File "C:\TrabajoIA\TrabajoIA\Apps\Gestion\models.py", line 23, in datos
    kmeans = KMeans(n_clusters=3).fit(cadena2)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\cluster\k_means_.py", line 968, in fit
    return_n_iter=True)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\cluster\k_means_.py", line 311, in k_means
    order=order, copy=copy_x)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\utils\validation.py", line 522, in check_array
    array = np.asarray(array, dtype=dtype, order=order)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\numpy\core\numeric.py", line 501, in asarray
    return array(a, dtype, copy=False, order=order)
ValueError: could not convert string to float: '{0} {1} {2}'
[17/Dec/2018 04:51:07] "GET /admin/Gestion/tabla/ HTTP/1.1" 500 316834
Internal Server Error: /admin/Gestion/tabla/
Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\models\options.py", line 564, in get_field
    return self.fields_map[field_name]
KeyError: '__str__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 278, in lookup_field
    f = _get_non_gfk_field(opts, name)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 309, in _get_non_gfk_field
    field = opts.get_field(name)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\models\options.py", line 566, in get_field
    raise FieldDoesNotExist("%s has no field named '%s'" % (self.object_name, field_name))
django.core.exceptions.FieldDoesNotExist: tabla has no field named '__str__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\base.py", line 156, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\handlers\base.py", line 154, in _get_response
    response = response.render()
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\response.py", line 106, in render
    self.content = self.rendered_content
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\response.py", line 83, in rendered_content
    content = template.render(context, self._request)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\backends\django.py", line 61, in render
    return self.template.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 171, in render
    return self._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 937, in render
    bit = node.render_annotated(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\base.py", line 904, in render_annotated
    return self.render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\base.py", line 33, in render
    return super().render(context)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\template\library.py", line 214, in render
    _dict = self.func(*resolved_args, **resolved_kwargs)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 341, in result_list
    'results': list(results(cl))}
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 318, in results
    yield ResultList(None, items_for_result(cl, res, None))
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 309, in __init__
    super().__init__(*items)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\templatetags\admin_list.py", line 228, in items_for_result
    f, attr, value = lookup_field(field_name, result, cl.model_admin)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\contrib\admin\utils.py", line 291, in lookup_field
    value = attr()
  File "C:\TrabajoIA\TrabajoIA\Apps\Gestion\models.py", line 28, in __str__
    return self.datos()
  File "C:\TrabajoIA\TrabajoIA\Apps\Gestion\models.py", line 23, in datos
    kmeans = KMeans(n_clusters=3).fit(cadena2)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\cluster\k_means_.py", line 968, in fit
    return_n_iter=True)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\cluster\k_means_.py", line 311, in k_means
    order=order, copy=copy_x)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\sklearn\utils\validation.py", line 522, in check_array
    array = np.asarray(array, dtype=dtype, order=order)
  File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\numpy\core\numeric.py", line 501, in asarray
    return array(a, dtype, copy=False, order=order)
ValueError: could not convert string to float: '{0} {1} {2}'
[17/Dec/2018 04:51:09] "GET /admin/Gestion/tabla/ HTTP/1.1" 500 316804

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祖安文状元 2020-02-21 17:30:50 493 0
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  • 祖安文状元

    KMeans要求您传递类似数组的对象，而看起来您正在传递字符串。您可以尝试更换

    cadena2="{0} {1} {2}"
cadena2.format(self.cantidad,self.comida,self.edad)

    与

    cadena2 = [self.cantidad,self.comida,self.edad].

    假设列表（self.cantidad,self.comida,self.edad）中的项目是数字而不是字符串，则可以使用。

    2020-02-21 17:31:05
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问答分类：
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问答标签：
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1 【大咖问答】对话PostgreSQL 中国社区发起人之一，阿里云数据库高级专家 德哥 1819114
2 据说在家办公的程序员是这样写代码的？ 1793266
3 阿里云开放端口权限 690342
4 如何升级配置 536323
5 【藏经阁一起读（27）】本周推荐《Apache Flink案例集（2022版）》，你有哪些心得？ 522898
6 【精品问答】python技术1000问(1) 514149
7 Flink Forward Asia 2021 有奖问答 512930
8 OceanBase 使用动画（持续更新） 359395
9 阿里云LNAMP(Linux + Nginx + Apache + MySQL + PHP)环境一键安装脚本 329815
10 OSS存储服务-客户端工具 321631
11 为体验实验室取一个新名字。 307507
12 企业邮箱发送邮件时，若出现投递失败产生退信，内容提示包含如下： the mta server of * reply:550 failed to meet SPF requirements 或者 the mta server of 163.com — 163mx01.mxmail.netease.com(220.181.14.141) reply:550 MI:SPF mx14,QMCowECpA0qTiftVaeB3Cg—.872S2 1442548128 http://mail.163.com/help 304122
13 Win Server 2003-2016 加密勒索事件必打补丁合集 295348
14 FLASH播放器，在IE浏览器下显示请确定您的域名已完成备案和CNAME绑定 284248
15 安全组详解，新手必看教程 277358
16 写code还是做管理，开发者如何进行职业规划？ 269233
17 惊喜翻倍：免费ECS+免费环境配置~！(ECS免费体验6个月活动3月31日结束) 255893
18 阿里云手机和阿云浏览器连接问题专帖 235704
19 支付宝H5 下载的时候，提示 【请确保该下载文件来源安全,如需浏览,请长按网址复制后使用浏览器访问】 230614
20 请问阿里云邮箱如何开启SMTP服务啊！ 225905
1 通义APP上新【局部风格化】新功能，万物皆可毛茸茸你体验了吗？ 433
2 一个专属的智能 AI 总结助手，能在多大程度上提升工作效率？ 580
3 宜搭是否可以和钉钉OA审批打通，钉钉OA审批提交的数据宜搭是否可以联动字段数据过来使用？ 160
4 宜搭表单中的复选框问题 165
5 关于宜搭普通表单如何获取钉钉通讯录数据以及考勤数据的问题。 100
6 AI视频技术的发展是否会影响原创内容的价值？ 1119
7 日常工作中，开发者应该如何避免“效率陷阱”？ 594
8 AI 编码助手能否引领编程革命？一起探索 AI 对研发流程的变革 1611
9 宜搭数据管理页面如何把一个字段设置为链接跳转 290
10 AI新茶饮，是噱头还是未来？ 1531
11 开发者们需要如何打造属于自己的Plan B? 802
12 阿里云电脑免费体验30天在哪申请？ 261
13 ACP认证有几次考试机会？ 229
14 动机VS自律，对开发者们来说哪个比较重要？ 866
15 AI音色克隆挑战播客，它能模拟人的特质吗？ 1329
16 宜搭集成自动化功能流程触发另一个流程，被触发的流程里面包含的子表单的内容如何设置 153
17 阿里云RDS mysql数据库show slave status信息疑问 528
18 求助：宜搭如何在请求数据源时传入参数 266
19 宜搭报表对日期字段赋值 409
20 求助：如何在宜搭自定义表单中获取普通表单子表单中的数据 342

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