如何在 python 中从 Web 抓取的数据中写入 csv 文件

Question

我正在尝试从网页上抓取数据并且也能够抓取。 使用以下脚本获取所有 div 类数据后，但我很困惑如何在 CSV 文件中写入数据。

名字列中的第一个数据 姓氏列中的姓氏数据 . .

from urllib.request import urlopen
from bs4 import BeautifulSoup

html = 'http://rerait.telangana.gov.in/PrintPreview/PrintPreview/UHJvamVjdElEPTQmRGl2aXNpb249MSZVc2VySUQ9MjAyODcmUm9sZUlEPTEmQXBwSUQ9NSZBY3Rpb249U0VBUkNIJkNoYXJhY3RlckQ9MjImRXh0QXBwSUQ9'

page = urlopen(html)

data = BeautifulSoup(page, 'html.parser')

name_box = data.findAll('div', attrs={'class': 'col-md-3 col-sm-3'}) #edited companyName_99a4824b -> companyName__99a4824b

for i in range(len(name_box)):
    data = name_box[i].text.strip()

数据：

Information Type
Individual

First Name
KACHAM
Middle Name

Last Name
RAJESHWAR
Father Full Name
RAMAIAH
Do you have any Past Experience ?
No
Do you have any registration in other State than registred State?
No
House Number
8-2-293/82/A/446/1
Building Name
SAI KRUPA
Street  Name
ROAD NO 20
Locality
JUBILEE HILLS
Landmark
JUBILEE HILLS
State
Telangana
Division
Division 1
District
Hyderabad
Mandal
Shaikpet
Village/City/Town

Pin Code
500033
Office Number
04040151614
Fax Number

Website URL

Authority Name

Plan Approval Number
1/18B/06558/2018
Project Name
SKV S ANANDA VILAS
Project Status
New Project
Proposed Date of Completion
17/04/2024
Litigations related to the project ?
No
Project Type
Residential
Are there any Promoter(Land Owner/ Investor) (as defined by Telangana RERA Order) in the project ?
Yes
Sy.No/TS No.
00
Plot No./House No.
10-2-327
Total Area(In sqmts)
526.74
Area affected in Road widening/FTL of Tanks/Nala Widening(In sqmts)
58.51
Net Area(In sqmts)
1
Total Building Units (as per approved plan)
1
Proposed Building Units(as per agreement)
1


Boundaries East
PLOT NO 213
Boundaries West
PLOT NO 215
Boundaries North
PLOT NO 199
Boundaries South
ROAD NO 8
Approved Built up Area (In Sqmts)
1313.55
Mortgage Area  (In Sqmts)
144.28
State
Telangana
District
Hyderabad
Mandal
Maredpally
Village/City/Town

Street
ROAD NO 8
Locality
SECUNDERABAD COURT
Pin Code
500026

上面是上面代码运行后得到的数据。

编辑

for i in range(len(name_box)):
    data = name_box[i].text.strip()
    print (data)
    fname = 'out.csv'
    with open(fname) as f:
        next(f)
        for line in f:
            head = []
            value = []
            for row in line:
                head.append(row)
            print (row)

预期

Information Type | First  | Middle Name | Last Name | ......
Individual       | KACHAM |             | RAJESHWAR | .....

我有 200 个 url，但所有 url 数据都不相同，这意味着其中一些缺失。如果数据不可用，我想这样写，然后写一个空白。

请提出建议。提前谢谢你

Answer 1

要写入 csv，您需要知道 head 和 body 中应该是什么值，在这种情况下，head 值应该是包含 <label 的 html 元素

from urllib2 import urlopen
from bs4 import BeautifulSoup

html = 'http://rerait.telangana.gov.in/PrintPreview/PrintPreview/UHJvamVjdElEPTQmRGl2aXNpb249MSZVc2VySUQ9MjAyODcmUm9sZUlEPTEmQXBwSUQ9NSZBY3Rpb249U0VBUkNIJkNoYXJhY3RlckQ9MjImRXh0QXBwSUQ9'

page = urlopen(html)

data = BeautifulSoup(page, 'html.parser')

name_box = data.findAll('div', attrs={'class': 'col-md-3 col-sm-3'}) #edited companyName_99a4824b -> companyName__99a4824b

heads = []
values = []

for i in range(len(name_box)):
    data = name_box[i].text.strip()
    dataHTML = str(name_box[i])
    if 'PInfoType' in dataHTML:
        # <div class="col-md-3 col-sm-3" id="PInfoType">
        # empty value, maybe additional data for "Information Type"
        continue

    if 'for="2"' in dataHTML:
        # <label for="2">No</label>
        # it should be head but actually value
        values.append(data)

    elif '<label' in dataHTML:
        # <label for="PersonalInfoModel_InfoTypeValue">Information Type</label>
        # head or top row
        heads.append(data)

    else:
        # <div class="col-md-3 col-sm-3">Individual</div>
        # value for second row
        values.append(data)

csvData = ', '.join(heads) + '\n' + ', '.join(values)    
with open("results.csv", 'w') as f:
    f.write(csvData)

print "finish."

Answer 2

问题：如何从抓取的数据中写入csv文件

将Data 读入dict 并使用csv.DictWriter(... 写入CSV 文件。
关于： csv.DictWriter while next break Mapping Types — dict

1. 跳过第一行，因为它是标题
2. 循环Data 行
   1. key = next(data)
   2. value = next(data)
   3. 如果没有更多数据则中断循环
   4. 构建dict[key] = value
3. 循环结束后，将dict写入CSV文件

输出：

{'Individual': '', 'Father Full Name': 'RAMAIAH', 'First Name': 'KACHAM', 'Middle Name': '', 'Last Name': 'RAJESHWAR',... (omitted for brevity)