使用 Python Pandas 对 csv 文件中的行进行排序 [英] Sorting rows in csv file using Python Pandas
问题描述
我有一个关于使用 Pandas 对 csv 文件中的行进行排序的快速问题.我拥有的 csv 文件的数据如下所示:
季度周值5 1 2003 2 1002 1 502 2 1254 2 1752 3 1953 1 105 2 190
我需要按以下方式排序:对季度和相应的周进行排序.所以输出应该如下所示:
季度周值2 1 502 2 1252 3 1953 1 103 2 1004 2 1755 1 2005 2 190
我的尝试:
df = df.sort('季度', '周')
但这不会产生正确的结果.任何帮助/建议?
谢谢!
注意:
sort
已被弃用,取而代之的是sort_values
,你应该在 Pandas 0.17+ 中使用.
输入 help(df.sort)
给出:
sort(self, columns=None, column=None, axis=0, Ascending=True, inplace=False) pandas.core.frame.DataFrame 实例的方法按标签(沿任一轴)或中的值对 DataFrame 进行排序列)参数----------列:对象框架中的列名.接受列名或列表或元组对于嵌套排序.[...]例子-------->>>结果 = df.sort(['A', 'B'], 升序=[1, 0])[...]
因此您将要排序的列作为列表传递:
<预><代码>>>>df季度价值0 5 1 2001 3 2 1002 2 1 503 2 2 1254 4 2 1755 2 3 1956 3 1 107 5 2 190>>>df.sort(["季度","周"])季度价值2 2 1 503 2 2 1255 2 3 1956 3 1 101 3 2 1004 4 2 1750 5 1 2007 5 2 190I have a quick question regarding sorting rows in a csv files using Pandas. The csv file which I have has the data that looks like:
quarter week Value
5 1 200
3 2 100
2 1 50
2 2 125
4 2 175
2 3 195
3 1 10
5 2 190
I need to sort in following way: sort the quarter and the corresponding weeks. So the output should look like following:
quarter week Value
2 1 50
2 2 125
2 3 195
3 1 10
3 2 100
4 2 175
5 1 200
5 2 190
My attempt:
df = df.sort('quarter', 'week')
But this does not produce the correct result. Any help/suggestions?
Thanks!
Note:
sort
has been deprecated in favour ofsort_values
, which you should use in Pandas 0.17+.
Typing help(df.sort)
gives:
sort(self, columns=None, column=None, axis=0, ascending=True, inplace=False) method of pandas.core.frame.DataFrame instance
Sort DataFrame either by labels (along either axis) or by the values in
column(s)
Parameters
----------
columns : object
Column name(s) in frame. Accepts a column name or a list or tuple
for a nested sort.
[...]
Examples
--------
>>> result = df.sort(['A', 'B'], ascending=[1, 0])
[...]
and so you pass the columns you want to sort as a list:
>>> df
quarter week Value
0 5 1 200
1 3 2 100
2 2 1 50
3 2 2 125
4 4 2 175
5 2 3 195
6 3 1 10
7 5 2 190
>>> df.sort(["quarter", "week"])
quarter week Value
2 2 1 50
3 2 2 125
5 2 3 195
6 3 1 10
1 3 2 100
4 4 2 175
0 5 1 200
7 5 2 190
这篇关于使用 Python Pandas 对 csv 文件中的行进行排序的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!