Python -需要删除dataframe中的所有数据，其中某个特定列的值至少包含1个字母

import pandas as pd
import re

data = {'col1': ['123', 'abc', '456', 'def'], 'col2': ['xyz', '789', '123', '456']}
df = pd.DataFrame(data)

pattern = re.compile('[a-zA-Z]')
mask = df['col1'].apply(lambda x: bool(pattern.search(x)))

df = df[~mask]

import pandas as pd
import re

data = {'col1': ['123', 'abc', '456', 'def'], 'col2': ['xyz', '789', '123', '456']}
df = pd.DataFrame(data)

pattern = re.compile('[a-zA-Z]')
mask = df['col1'].apply(lambda x: bool(pattern.search(x)))

df = df[~mask]