<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[magi7的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/magi7</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; magi7]]></copyright><item><title><![CDATA[Python 数据分析 dataframe将日期转为周数]]></title><link>https://blog.youkuaiyun.com/magi7/article/details/115400197</link><guid>https://blog.youkuaiyun.com/magi7/article/details/115400197</guid><author>magi7</author><pubDate>Fri, 02 Apr 2021 15:41:45 +0800</pubDate><description><![CDATA[在用python做数据分析时，如何添加新的一列周数“week”，将日期，比如“2021-03-02”转为2021的第n周呢？
介绍两个方法：
我的数据的dataframe名为sample，已有特征“date”，现在加入一个新的特征“week”
1.使用dt.week
sample["week"]=sample["date"].dt.week

2.使用DatetimeIndex
df['week'] = pd.DatetimeIndex(sample['date']).week


...]]></description><category></category></item><item><title><![CDATA[Python 对比两个list中元素是否相同（忽略顺序)]]></title><link>https://blog.youkuaiyun.com/magi7/article/details/115376360</link><guid>https://blog.youkuaiyun.com/magi7/article/details/115376360</guid><author>magi7</author><pubDate>Thu, 01 Apr 2021 15:56:48 +0800</pubDate><description><![CDATA[Python 对比两个list中元素是否相同（忽略顺序）
a=[1,2,3,4,5,6,7,8,9]
b=[9,8,7,6,5,4,3,2,1]
a和b两个list中元素是一样的，只是顺序不一样，我们怎么判断他们呢？
from collections import Counter
a=[1,2,3,4,5,6,7,8,9]
b=[9,8,7,6,5,4,3,2,1]
a = Counter(a)
b = Counter(b)
print (dict(a)==dict(b))
# True

这样就完成啦.
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