Вытащить регуляркой телефон из текста

df['phone'] = df['kommentarii'].map(lambda x: re.search(r"\d{10}", x))

df['phone'] = df['kommentarii'].map(lambda x: re.search(r"\d{10}", x)[0])

df['phone'] = df['kommentarii'].map(lambda x: re.search(r"\d{10}", , x).group())

import pandas as pd
data = {'kommentarii': ['9999999999,фамилия', '99999999991', '15гв', ''], 'phone': ['', '', '', '']} 
df = pd.DataFrame(data)

import pandas as pd
import re
 
data = {'kommentarii': ['9999999999', 'фамилия', '99999999991', '15гв'], 'phone': ['', '', '', '']}
df = pd.DataFrame(data)
df['phone'] = df['kommentarii'].map(lambda x: re.search(r"\d{10}", x)[0] if re.search(r"\d{10}", x) else '')
print(df)

import pandas as pd
import re
 
data = {'kommentarii': ['9999999999', 'фамилия', '99999999991', '15гв'], 'phone': ['11', '22', '33', '44']}
df = pd.DataFrame(data)
df['phone'] = df['kommentarii'].map(lambda x: re.search(r"\d{10}", x)[0] if re.search(r"\d{10}", x) else df['phone'][0])
df

import pandas as pd
import numpy as np 
 
data = {'kommentarii': ['9999999999', 'фамилия', '99999999991', '15гв'], 'phone': ['11', '22', '33', '44']}
df = pd.DataFrame(data)
df['tmp'] = df['kommentarii'].str.extract(r"(\d{10})")
df['phone'] = np.where(df['tmp'].values==df['tmp'].values, df['tmp'].values, df['phone'].values)
df.drop('tmp', axis=1, inplace=True)
print(df)

df['phone'] = df[['kommentarii', 'phone']].apply(lambda x: re.search(r"\d{10}", x[0])[0] 
                                                 if re.search(r"\d{10}", x[0]) else x[1],
                                                 axis=1)