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作者 abc2090614 在 PTT [ Python ] 看板的留言(推文), 共32則
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1F→: github的data要用raw file的連結來抓11/01 09:47
2F→: 你點那個連結 中間靠右的Raw 然後用網址列的連結就可11/01 09:47
3F→: https://automatetheboringstuff.com/ 完全免費好書10/04 11:11
4F→: 用i.iloc[0,1]比較好也比較快07/03 07:18
5F→: 如果只取一列就用.iat07/03 07:18
1F→: pd.DataFrame 作 groupby以後會變06/14 10:33
2F→: pandas.core.groupby.DataFrameGroupBy06/14 10:33
3F→: 雖然兩個都有method都叫 .apply但意思不一樣06/14 10:33
4F→: groupby的 .apply是對group作 dataframe是對row或col06/14 10:34
5F→: 可以看看說明的這兩個物件06/14 10:35
6F→: pandas.core.groupby.GroupBy.apply06/14 10:35
7F→: 和 pandas.DataFrame.apply06/14 10:35
3F推: 喔喔 謝分享05/21 01:19
4F→: 二月聽kenneth給pipenv的talk時有人問他conda05/21 01:20
5F→: 他覺得conda是system packaging tool 跟pipenv要解決05/21 01:21
6F→: 的問題不太一樣05/21 01:21
8F→: pandas記憶體效率比data.table差很多03/25 22:14
9F→: Wes McKinney自己有說pandas是吃記憶體怪獸...03/25 22:14
6F→: pandas超級亂.....01/06 11:40
7F→: 然後他有些method名字根本問號 像where的用法跟SQL01/06 11:41
8F→: 相反, backfill其實是forward fill 之類 超亂01/06 11:41
22F→: x for x 叫作list comprehension12/17 02:47
4F→: 87%神秘數字09/23 10:21
1F→: 你是遇到什麼錯誤嗎? 可以試看看用findspark這個lib09/10 00:43
2F→: 先確定 pyspark 在shell裡能跑09/10 00:43