In [41]: df = pd.DataFrame([['123'],['ab 123'],['xyz']],columns = ['A'])
In [42]: df
Out[42]:
A
0 123
1 ab 123
2 xyz
In [43]: df[df["A"].str.contains("\d+")]
Out[43]:
A
0 123
1 ab 123
In [47]: df[df["A"].str.contains("\d+")]['A'].str.extract("(\d+)")
Out[47]:
0 123
1 123
Name: A, dtype: object
In [48]: df['A'].str.extract("(\d+)")
Out[48]:
0 123
1 123
2 NaN
Name: A, dtype: object
如何使用^{} ,例如-
示例/演示-
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