sismos.py

import requests
import time

url = "http://www.igp.gob.pe/bdsismos/ultimosSismosSentidos.php"
data = {
        'xjxfun': 'aux',
        'xjxr': int(time.time() * 1000),
        'xjxargs[]': ['N20', 'N1', '<xjxobj><e><k>optionMonth0</k><v>S1</v></e><e><k>optionMonth1</k><v>S2</v></e><e><k>optionMonth2</k><v>S3</v></e><e><k>optionMonth3</k><v>S4</v></e><e><k>optionMonth4</k><v>S5</v></e><e><k>optionMonth5</k><v>S6</v></e><e><k>optionMonth6</k><v>S7</v></e><e><k>optionMonth7</k><v>S8</v></e><e><k>optionMonth8</k><v>S9</v></e></xjxobj>']
}

response = requests.post(url, data=data)

print response.text