Python Pandas提取，如何提取字符串的剩余部分

Question

I have looked for hours and this should be simple. I am trying to extract all the letters from a string with a mixture or digits and letters. Here is an example:

df = pd.Series(['ENGLANDSR11SW'])
df = df.to_frame('column')
df['ValueAfterExtract'] = df['column'].str.extract("(?P<letter>[a-zA-Z]+)")
print(df)

From the string value ENGLANDSR11SW in the dataframe, the result is ENGLANDSR but i want to bring even the last letters of the string which is the SW which should result in ENGLANDSRSW , meaning only the digits 11 would be removed.

How can i do this?

Answer 1

Replace all digits ( \\d ) with empty strings:

In [6]: df['column'].str.replace(r'\d', '')
Out[10]: 
0    ENGLANDSRSW
Name: column, dtype: object

Or, to remove everything which is not in [a-zA-Z] use the regexp [^a-zA-Z] . This would remove, for instance, whitespace and punctuation marks as well as digits:

In [20]: df['column'].str.replace(r'[^a-zA-Z]', '')
Out[20]: 
0    ENGLANDSRSW
Name: column, dtype: object