Pandas中Cookbook时间戳处理的示例分析-创新互联
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# -*-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]
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