我有这个pandas数据框,实际上是一个excel电子表格:
Unnamed: 0 Date Num Company Link ID
0 NaN 1990-11-15 131231 apple... http://www.example.com/201611141492/xellia... 290834
1 NaN 1990-10-22 1231 microsoft http://www.example.com/news/arnsno... NaN
2 NaN 2011-10-20 123 apple http://www.example.com/ator... 209384
3 NaN 2013-10-27 123 apple... http://example.com/sections/th-shots/2016/... 098
4 NaN 1990-10-26 123 google http://www.example.net/business/Drugmak... 098098
5 NaN 1990-10-18 1231 google... http://example.com/news/va-rece... NaN
6 NaN 2011-04-26 546 amazon... http://www.example.com/news/home/20160425... 9809
我想删除NaN
列中ID
的所有行,并重新索引"索引虚拟列":
Unnamed: 0 Date Num Company Link ID
0 NaN 1990-11-15 131231 apple... http://www.example.com/201611141492/xellia... 290834
1 NaN 2011-10-20 123 apple http://www.example.com/ator... 209384
2 NaN 2013-10-27 123 apple... http://example.com/sections/th-shots/2016/... 098
3 NaN 1990-10-26 123 google http://www.example.net/business/Drugmak... 098098
4 NaN 2011-04-26 546 amazon... http://www.example.com/news/home/20160425... 9809
我知道这可以按照以下方式完成:
df = df['ID'].dropna()
或者
df[df.ID != np.nan]
或者
df = df[np.isfinite(df['ID'])]
TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
或者
df[df.ID()]
或者:
df[df.ID != '']
然后:
df.reset_index(drop=True, inplace=True)
但是,它没有删除NaN
中的ID
。我正在使用以前的数据帧。
更新
在:
df['ID'].values
输出:
array([ '....A lot of text....',
nan,
"A lot of text...",
"More text",
'text from the site',
nan,
"text from the site"], dtype=object)
答案 0 :(得分:2)
试试df.dropna(axis = 1)
。
或者,df.dropna(axis = 0, subset = "ID")
看看它是否有帮助。
答案 1 :(得分:2)
试试这个
df = df[df.ID != 'nan']