[英]Pandas filling blanks
Python 3.9 和 Pandas 1.3.4
所以这里是df:
1 First name Last Name
2 Freddie Mercury
3 John Lennon
4 David Bowie
5
6 Joseph
7 Jovi
当我连接First name
和Last name
时,我试图用“John Doe”填充空白行 (5),但我不想在第 6 行或第 7 行放置“John Doe”,因为它有部分名称。
所以这是我当前的代码:
import pandas as pd
df = pd.read_csv('file.csv', dtype=str, header=0)
df['First name'] = df['First name'].str.replace(' ', 'John Doe', regex=True)
df['Last name'] = df['Last name'].str.replace(' ', 'John Doe', regex=True)
df['fullname'] = df['First name'].fillna(" ") + " " + df["Last name"].fillna(" ")
df.to_csv('file.csv', index=False)
这当前会生成一个fullname
,如下所示:
fullname
Freddie Mercury
John Lennon
David Bowie
Joseph
Jovi
这就是我要的:
Freddie Mercury
John Lennon
David Bowie
John Doe
Joseph
Jovi
尝试:
df['fullname'] = (df[['First name', 'Last Name']]
.fillna('').agg(' '.join, axis=1) # replace nan with '' and concatenate
.str.strip() # remove leading/trailing spaces
.replace('', 'John Doe') # replace empty name with default
)
Output:
First name Last Name fullname
0 Freddie Mercury Freddie Mercury
1 John Lennon John Lennon
2 David Bowie David Bowie
3 None None John Doe
4 Joseph None Joseph
5 NaN Jovi Jovi
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.