這篇文章主要介紹了Scrapy框架基本命令有哪些,具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
1.創建爬蟲項目
scrapy startproject [項目名稱]
2.創建爬蟲文件
scrapy genspider +文件名+網址
3.運行(crawl)
scrapy crawl 爬蟲名稱 # -o output 輸出數據到文件 scrapy crawl [爬蟲名稱] -o zufang.json scrapy crawl [爬蟲名稱] -o zufang.csv
4.check檢查錯誤
scrapy check
5.list返回項目所有spider
scrapy list
6.view 存儲、打開網頁
scrapy view http://www.baidu.com
7.scrapy shell, 進入終端
scrapy shell https://www.baidu.com
8.scrapy runspider
scrapy runspider zufang_spider.py
# -*- coding: utf-8 -*-
# Scrapy settings for maitian project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
# https://doc.scrapy.org/en/latest/topics/settings.html
# https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html
BOT_NAME = 'maitian'
SPIDER_MODULES = ['maitian.spiders']
NEWSPIDER_MODULE = 'maitian.spiders'
#不能批量設置
# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = 'maitian (+http://www.yourdomain.com)'
#默認遵守robots協議
# Obey robots.txt rules
ROBOTSTXT_OBEY = False
#設置日志文件
LOG_FILE="maitian.log"
#日志等級分為5種:1.DEBUG 2.INFO 3.Warning 4.ERROR 5.CRITICAL
#等級越高 輸出的日志越少
# LOG_LEVEL="INFO"
#scrapy設置最大并發數 默認16
# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32
#設置批量延遲請求16 等待3秒再發16 秒
# Configure a delay for requests for the same website (default: 0)
# See https://doc.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16
#cookie 不生效 默認是True
# Disable cookies (enabled by default)
#COOKIES_ENABLED = False
#遠程
# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False
#加載默認的請求頭
# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
# 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
# 'Accept-Language': 'en',
#}
#爬蟲中間件
# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
# 'maitian.middlewares.MaitianSpiderMiddleware': 543,
#}
#下載中間件
# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
# 'maitian.middlewares.MaitianDownloaderMiddleware': 543,
#}
# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
#}
#在配置文件 開啟管道
#優先級的范圍 0--1000;值越小 優先級越高
# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html
#ITEM_PIPELINES = {
# 'maitian.pipelines.MaitianPipeline': 300,
#}
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False
# Enable and configure HTTP caching (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'感謝你能夠認真閱讀完這篇文章,希望小編分享的“Scrapy框架基本命令有哪些”這篇文章對大家有幫助,同時也希望大家多多支持億速云,關注億速云行業資訊頻道,更多相關知識等著你來學習!
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