今天用 pycharm 运行 demo 的时候发现一个问题，当运行以下代码时，对象f的方法没有提示：
from urllib import request
with request.urlopen('https://api.douban.com/v2/book/2129650') as f:
通过论坛求助知道了以下几种方法：
-
使用注释辅助推导类型
from urllib import request, parse from http.client import HTTPResponse with request.urlopen('https://api.douban.com/v2/book/2129650') as f: # type: HTTPResponse data = f.read() print('Status:', f.status, f.reason) for k, v in f.getheaders(): print('%s: %s' % (k, v)) print('Data:', data.decode('utf-8')) -
使用
assert isinstance()推导类型from urllib import request, parse from http.client import HTTPResponse with request.urlopen('https://api.douban.com/v2/book/2129650') as f: assert isinstance(f, HTTPResponse) data = f.read() print('Status:', f.status, f.reason) for k, v in f.getheaders(): print('%s: %s' % (k, v)) print('Data:', data.decode('utf-8'))
