python urllib2下载大小

pip install urllib2

import urllib2

# 下载文件的URL
url = "http://example.com/file.zip"

# 请求头信息，用于身份验证和设置下载请求
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
}

# 创建下载请求
req = urllib2.Request(url, headers=headers)

# 打开下载连接并读取内容
resp = urllib2.urlopen(req)

# 将内容写入文件
with open("file.zip", "wb") as f:
    while True:
        chunk = resp.read(1024)
        if not chunk:
            break
        f.write(chunk)

print("下载完成！")