在 Pandas 中将元组中的字符串拆分为列 [英] Split strings in tuples into columns, in Pandas
本文介绍了在 Pandas 中将元组中的字符串拆分为列的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有以下 DataFrame
,其中 Track ID
是行索引.如何将 stats
列中的字符串拆分为 5 列数字?
I have the following DataFrame
, where Track ID
is the row index. How can I split the string in the stats
column into 5 columns of numbers?
Track ID stats
14.0 (-0.00924175824176, 0.41, -0.742016492568, 0.0036830094242, 0.00251748449963)
28.0 (0.0411538461538, 0.318230769231, 0.758717081514, 0.00264000622468, 0.0106535783677)
42.0 (-0.0144351648352, 0.168438461538, -0.80870348637, 0.000816872566404, 0.00316572586742)
56.0 (0.0343461538462, 0.288730769231, 0.950844962874, 6.1608706775e-07, 0.00337262030771)
70.0 (0.00905164835165, 0.151030769231, 0.670257006716, 0.0121790506745, 0.00302182567957)
84.0 (-0.0047967032967, 0.171615384615, -0.552879463981, 0.0500316517755, 0.00217970256969)
推荐答案
对于另一种情况,假设它是看起来像元组的字符串:
And for the other case, assuming it are strings that look like tuples:
In [74]: df['stats'].str[1:-1].str.split(',', expand=True).astype(float)
Out[74]:
0 1 2 3 4
0 -0.009242 0.410000 -0.742016 0.003683 0.002517
1 0.041154 0.318231 0.758717 0.002640 0.010654
2 -0.014435 0.168438 -0.808703 0.000817 0.003166
3 0.034346 0.288731 0.950845 0.000001 0.003373
4 0.009052 0.151031 0.670257 0.012179 0.003022
5 -0.004797 0.171615 -0.552879 0.050032 0.002180
(注意:对于旧版本的 Pandas(<0.16.1),您需要使用 return_type='frame'
而不是 expand 关键字)
(note: for older versions of pandas (< 0.16.1), you need to use return_type='frame'
instead of the expand keyword)
顺便说一句,如果它是元组而不是字符串,您可以简单地执行以下操作:
By the way, if it are tuples and not strings, you can simply do the following:
pd.DataFrame(df['stats'].tolist(), index=df.index)
这篇关于在 Pandas 中将元组中的字符串拆分为列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!
查看全文