“丝路通:分布式爬虫任务分配”的版本间的差异
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(创建页面,内容为“==任务切割== ===敦煌网=== <nowiki> import time task_header ='../../task/dh_task/dh_task_' #header def assign_task(): task_content = "" # 创建类别…”) |
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==任务切割== | ==任务切割== | ||
+ | 将原始的待爬目录表 分割成许多小份,当作许多小任务去完成。 | ||
===敦煌网=== | ===敦煌网=== | ||
<nowiki> | <nowiki> |
2020年9月17日 (四) 13:41的版本
任务切割
将原始的待爬目录表 分割成许多小份,当作许多小任务去完成。
敦煌网
import time task_header ='../../task/dh_task/dh_task_' #header def assign_task(): task_content = "" # 创建类别网址列表 fp = open('dh_sub_category.csv', "rt") # 打开csv文件 count= 0 num =0 #类别名 类目级别 父类目级别 s =set()#储存已有的类别 for line in fp: # 文件对象可以直接迭代 count +=1 task_content +=line if count%100 ==0: num += 1 fw = open(task_header+str(num)+".csv","w",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" fw = open(task_header+str(num)+".csv","a",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" fp.close() if __name__ == '__main__': assign_task()
阿里巴巴
import time task_header ='../../task/ali_task/ali_task_' #header def assign_task(): task_content = "" # 创建类别网址列表 fp = open('alibaba_categary.csv', "rt") # 打开csv文件 count= 0 num =0 #类别名 类目级别 父类目级别 for line in fp: # 文件对象可以直接迭代 count +=1 task_content +=line if count%100 == 0: num += 1 fw = open(task_header+str(num)+".csv","w",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" if num <= 50: fw = open(task_header+str(num)+".csv","a",encoding="utf-8") else: fw = open(task_header+str(num+1)+".csv","a",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" fp.close() if __name__ == '__main__': assign_task()
中国制造网
import time task_header ='../../task/mc_task/mc_task_' #header def assign_task(): task_content = "" # 创建类别网址列表 fp = open('made_in_china_sub_cat.csv', "rt") # 打开csv文件 count= 0 num =0 for line in fp: # 文件对象可以直接迭代 count +=1 task_content +=line if count%200 ==0: num += 1 fw = open(task_header+str(num)+".csv","w",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" if num <= 100: fw = open(task_header+str(num)+".csv","a",encoding="utf-8") else: fw = open(task_header+str(num+1)+".csv","a",encoding="utf-8") fw.write(task_content) fw.close() task_content ="" fp.close() if __name__ == '__main__': assign_task()