HttpResponse用下划线代替文件名中的空格

filename = "my file.txt"
filename_with_underscore = filename.replace(" ", "_")

import urllib.request

url = "http://example.com/my file.txt"
response = urllib.request.urlopen(url)
filename = response.info().get("Content-Disposition").split("=")[1]
filename_with_underscore = filename.replace(" ", "_")

with open(filename_with_underscore, "wb") as f:
    f.write(response.read())