python爬虫的各种存储方式之txt
简单下载一个图片:
from urllib import request
url="http://pic.netbian.com/uploads/allimg/180912/221007-15367614072cc2.jpg"
request.urlretrieve(url,"冰岛瀑布.jpg") #下载和存放
存入txt
判断目录,有则打开,没有新建
import os
if os.path.exists('D:\Python\代码\数据爬取'):
os.chdir('D:\Python\代码\数据爬取')
else:
os.mkdir('D:\Python\代码\数据爬取')
os.chdir('D:\Python\代码\数据爬取')
1.写入txt,只能写入字符串
myfile = open('mytxt.txt','w',encoding='utf-8')
myfile.write('我在写入txt')
myfile.close()
#2.写入txt,追加内容
with open('mytxt.txt','a',encoding='utf-8') as file:
file.write('\n123465')
#向mytxt.txt追加写入九九乘法表
with open('mytxt.txt','a',encoding='utf-8') as file:
file.write('\n')
for i in range(1,10):
for j in range(1,i+1):
num = str(j)+'x'+str(i)+'='+str(j*i)+'\t'
file.write(str(num))
file.write('\n')
#读取txt
with open('mytxt.txt','r',encoding='utf-8')as file:
data = file.read()
print(data)