Pandas python 数据在输出到 Excel 表时没有被存储

如何解决Pandas python 数据在输出到 Excel 表时没有被存储

我只是想对网站进行网络抓取，并使用 Pandas 将数据导出到 excel。结果只打印列而不是结果，尽管 .appending to data (list).. 我做了很多谷歌搜索，最后来到这里寻求建议......我已经更新了上一个问题，因为它可能不是根据最小可行产品是否足够？提问要求..

下面的代码摘要如下（旅游网站）

硬编码的静态变量 进入网站 循环所有县 找出要循环浏览的帖子数 收集 URL 链接 for循环进入每个Page并提取数据并不断追加信息到data=[]

最后导出并打印到excel..

那是我的理想计划……看起来很近，但又很远……

import os
import sys
import time
import math
import urllib.request
import time
import numpy as np
import pandas as pd
from Stamprally import StamprallyInfo
from selenium import webdriver as wd
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import webdriverwait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import Select


prefectureNameList = ["海外"]

#,"北海道地方","北海道","東北地方","青森県","岩手県","宮城県","秋田県","山形県","福島県","関東地方","茨城県","栃木県","群馬県","埼玉県","千葉県","東京都","神奈川県","中部地方","新潟県","富山県","石川県","福井県","山梨県","長野県","岐阜県","静岡県",#                       "愛知県","三重県","近畿地方","滋賀県","京都府","大阪府","兵庫県","奈良県","和歌山県","中国地方","鳥取県","島根県","岡山県","広島県","山口県","四国地方","徳島県","香川県","愛媛県","高知県","九州・沖縄地方","福岡県","佐賀県","長崎県","熊本県","大分県","宮崎県","鹿児島県","沖縄県"]


data = []
contentAggregator = []
df = pd.DataFrame(data,columns=["Total List Number","Prefecture","ListLink","Location Tag","Event Tag","Available Period","Available StartDate","End Date","Last Updated","Main Image URL","Title","innerWebSiteURL","mainText"])
main_url = 'https://stamprally.org/'
driver = wd.Chrome(executable_path='chromedriver.exe')
driver.get(main_url)

prefectureValueStorage = driver.find_element_by_xpath(
    "//*[@id='header_search_cat1']/option[2]").get_attribute('value')

# [x.get_attribute('value') for x in driver.find_elements_by_xpath(
#     "//select[@name='search_cat1']/option[@class='level-1' or @class='level-0']")]

prefectureNameIterator = -1
# Loop through all the different prefectures
# for prefectureValue in prefectureValueStorage:
start = time.time()
prefectureNameIterator += 1
driver.get(
    f"https://stamprally.org/?search_keywords&search_keywords_operator=and&search_cat1={145}&search_cat2=0")

print("START OF PREFECTURE " + prefectureNameList[prefectureNameIterator])

# Calculate How Many Times To Run Page Loop
imageDownloadCounter = 1
totalList = driver.find_element_by_css_selector(
    'div.page_navi2.clearfix>p').text  # .get_attribute('text')
totalListNum = totalList.split("件中")
# Add TotalListNum to the contentAggregator
contentAggregator.append(int(totalListNum[0]))
if int(totalListNum[0]) % 10 != 0:
    pageLoopCount = math.ceil((int(totalListNum[0])/10))
else:
    pageLoopCount = int(totalListNum[0])/10
# continue
currentpage = 0
while currentpage < pageLoopCount:
    currentpage += 1
    print("Current Page " + str(currentpage))

# ========================================================================================================================================================
# # Loop through all the Listings within the prefecture page
    driver.get(
        f"https://stamprally.org/?search_keywords&search_keywords_operator=and&search_cat1={145}&search_cat2=0&paged={currentpage}")
    # print("Loading Page %s" % currentpage)
    # ========================================================================================================================================================
    # Add prefectureName to the contentAggregator
    # contentAggregator.append(prefectureNameList[prefectureNameIterator])
    # Gather All List Links
    urlList = []
    currentUrlCounter = 0
    listURLContainer = driver.find_elements_by_css_selector(
        '#post_list2 > li > a')
    # Put all the lists in one Array
    for url in listURLContainer:
        urlList.append(url.get_attribute('href'))
    # Loop through all the links
    for listURL in listURLContainer:
        contentAggregator = []
# Add TotalListNum to the contentAggregator
        contentAggregator.append(int(totalListNum[0]))
# Add prefectureName to the contentAggregator
        contentAggregator.append(
            prefectureNameList[prefectureNameIterator])
        print('article Link: ')
        print(urlList[currentUrlCounter])
    # Add listLink to the contentAggregator
        contentAggregator.append(
            urlList[currentUrlCounter])
    # for Each Links in listURLContainer:
        driver.get(urlList[currentUrlCounter])
        currentUrlCounter += 1
        locationTag = [x.get_attribute('title') for x in driver.find_elements_by_xpath(
            "//*[@id='post_Meta_top']/li[1]/a[@class='cat-category']")]
        print(locationTag)
    # Add locationTag to the contentAggregator
        contentAggregator.append(locationTag)

        eventTag = [x.get_attribute('title') for x in driver.find_elements_by_xpath(
            "//*[@id='post_Meta_top']/li[2]/a[@class='cat-category2']")]
        contentAggregator.append(eventTag)
        print(eventTag)
 
        availablePeriod = (driver.find_element_by_css_selector(
            'div#post_date')).text.split("（ ")
        availablePeriodFormatted = availablePeriod[0].replace("開催期間：","")
        availableStartDate = availablePeriod[0].split(" ～ ")
        endDate = availableStartDate[1]
        availableStartDateFormatted = availableStartDate[0].replace(
            "開催期間：","")
    # Select Latest Update Date
        lastUpdatedDate = driver.find_element_by_css_selector(
            'time.entry-date.updated').text
        print("Available Period:")
        print(availablePeriodFormatted)
    # Add Available Period to the contentAggregator
        contentAggregator.append(availablePeriodFormatted)
        print("Available StartDate:")
        print(availableStartDateFormatted)
    # Add Available StartDate to the contentAggregator
        contentAggregator.append(availableStartDateFormatted)
        print("End Date: ")
        print(endDate)
    # Add endDate to the contentAggregator
        contentAggregator.append(endDate)
        print("Last Updated:")
        print(lastUpdatedDate[6:])
    # Add lastUpdatedDate to the contentAggregator
        contentAggregator.append(lastUpdatedDate[6:])
# ========================================================================================================================================================
    # Download Main Post Image
        mainImageUrl = driver.find_element_by_css_selector(
            'img.attachment-post-thumbnail.size-post-thumbnail.wp-post-image').get_attribute('src')
    # Add lastUpdatedDate to the contentAggregator
        contentAggregator.append(mainImageUrl)
    # Save Post Main Title
        postTitle = driver.find_element_by_css_selector(
            'h2#post_title').text.replace(" 開催終了","")
        print("Title: ")
        print(postTitle)
    # Add Title to the contentAggregator
        contentAggregator.append(postTitle)
    # Save Post Main Image
        urllib.request.urlretrieve(mainImageUrl,(str(
            prefectureNameList[prefectureNameIterator])+postTitle+str(imageDownloadCounter) + ".png"))
        imageDownloadCounter += 1
    # Get Inner Website Link
        innerWebSiteButtonURL = driver.find_element_by_css_selector(
            'div.post_content.clearfix > div >a').get_attribute('href')
        print("inner Website Button URL: " + innerWebSiteButtonURL)
    # Add innerWebSiteURL to the contentAggregator
        contentAggregator.append(innerWebSiteButtonURL)
    # Gather Main Post Text Content
        mainText = driver.find_elements_by_css_selector(
            'div.post_content.clearfix > p')
        mainContentText = []
    # Remove disclamimer text
        for mainContentDetail in mainText:
            mainContentText.append(mainContentDetail.text)
        mainContextTextCount = len(mainContentText)-1
        print(mainContentText[:mainContextTextCount])
    # Add Main Post Text Content to the contentAggregator
        contentAggregator.append(mainContentText[:mainContextTextCount])

    # ========================================================================================================================================================
            contentReorder = [1,10,5,6,7,8,12,3,4,9,11,2]
            contentAggregator = [contentAggregator[i] for i in contentReorder]
            print("=====================================================================================================================================================")
            print(contentAggregator)
            data.append(contentAggregator)
            print(data)
            print(pd.DataFrame(data,"mainText"]))
            end = time.time()
            print(end - start)


xlwriter = pd.ExcelWriter('StampRally_Crawler.xlsx')
df.to_excel(xlwriter,sheet_name="Stamprally.org Crawl Result")
xlwriter.close()
# ========================================================================================================================================================
# Close  Off
driver.close()
driver.quit()
sys.exit()

解决方法

你已经初始化了你的 df

df = pd.DataFrame(data,columns=["Total List Number","Prefecture","ListLink","Location Tag","Event Tag","Available Period","Available StartDate","End Date","Last Updated","Main Image URL","Title","innerWebSiteURL","mainText"])

在循环中，您正在打印数据帧，但尚未将其分配给 df。您可以尝试移动我在计算结束时间之前粘贴的代码行。