Update something

commands/todayinhistory.py

@@ -0,0 +1,29 @@
+import requests
+from lxml import etree
+
+from command import CommandRegistry
+from commands import core
+
+__registry__ = cr = CommandRegistry()
+
+
+@cr.register('today_in_history', '历史上的今天')
+def today_in_history(_, ctx_msg):
+    core.echo('正在查询，请稍等……', ctx_msg)
+    resp = requests.get('http://tool.lu/todayonhistory/')
+    ok = False
+    if resp.status_code == 200:
+        html = etree.HTML(resp.text)
+        li_elems = html.xpath('//ul[@id="tohlis"]/li')
+        # reply = reduce(lambda x, y: x.text + '\n' + y.text, li_elems)
+        step = 10
+        for start in range(0, len(li_elems), step):
+            reply = ''
+            for item in li_elems[start:start + step]:
+                reply += item.text + '\n'
+            reply = reply.rstrip()
+            core.echo(reply, ctx_msg)
+        core.echo('以上～', ctx_msg)
+        ok = True
+    if not ok:
+        core.echo('很抱歉，网络出错了……建议等会儿再试吧～', ctx_msg)