Pandas:类似函数的 grep
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时间:2020-09-13 20:26:45 来源:igfitidea点击:
Pandas: grep like function
提问by fred
Is there a grep like built-in function in Pandas to drop a row if it has some string or value? Thanks in advance.
Pandas 中是否有类似 grep 的内置函数来删除具有某些字符串或值的行?提前致谢。
回答by Wouter Overmeire
Have a look at df['column_label].str Below example will drop all rows where column A holds 'a' character and 'B' equals 20.
看看 df['column_label].str 下面的示例将删除列 A 包含 'a' 字符且 'B' 等于 20 的所有行。
In [46]: df
Out[46]:
A B
0 foo 10
1 bar 20
2 baz 30
In [47]: cond = df['A'].str.contains('a') & (df['B'] == 20)
In [48]: df.drop(df[cond].index.values)
Out[48]:
A B
0 foo 10
2 baz 30

