Pandas-Cookbook 时间戳处理方式
# -*-coding:utf-8-*-
# by kevinelstri
# 2017.2.17
# ---------------------
# Chapter 8 - How to deal with timestamps.ipynb
# ---------------------
import pandas as pd
'''
8.1 Parsing Unix timestamps
'''
popcon = pd.read_csv('../data/popularity-contest', sep=' ')
# print popcon.head()
popcon.columns = ['atime', 'ctime', 'package-name', 'mru-program', 'tag']
# print popcon[:5]
print popcon['atime'].dtype
popcon['atime'] = popcon['atime'].astype(int)
# print popcon['atime'][:5]
# popcon['ctime'] = popcon['ctime'].astype(int)
popcon['atime'] = pd.to_datetime(popcon['atime'])
# popcon['ctime'] = pd.to_datetime(popcon['ctime'], unit='s')
# print popcon['atime'][:5]
popcon = popcon[popcon['atime'] > '1970-01-01']
nonlibraries = popcon[~popcon['package-name'].str.contains('lib')]
nonlibraries.sort('ctime', ascending=False)[:10]以上这篇Pandas-Cookbook 时间戳处理方式就是小编分享给大家的全部内容了，希望能给大家一个参考。