Question

我正在尝试学习数据帧，但是我仍然是一个初学者。假设我有一个包含两列的DataFrame：

Name       Description
Am         Owner of Am
BQ         Employee at BQ  
JW         Employee somewhere

我想检查名称是否也是描述的一部分，如果是，则保留该行。如果不是，请删除该行。在这种情况下，它将删除第三行（JW Employee在某处）

Answer 1

尝试一下：

df[df.apply(lambda x: x['Name'] in x['Description'], axis = 1)]

Answer 2

s='|'.join(df.Name)#Join the search words into a pattern
df=df[df.Description.str.contains(s)]#Mask using boolean select
print (df)

 Name     Description
0   Am     Owner of Am
1   BQ  Employee at BQ


%%timeit
s='|'.join(df.Name)
df[df.Description.str.contains(s)]
537 µs ± 2.37 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

%timeit df[df.apply(lambda x: x['Name'] in x['Description'], axis = 1)]
1.27 ms ± 3.22 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

熊猫数据框检查列是否包含另一列中存在的字符串

2 个答案: