使用字符串模式映射pandas系列

import pandas as pd

s = pd.Series(['apple', 'banana', 'cherry'])
result = s.str.contains('an')
print(result)

0    False
1     True
2    False
dtype: bool

import pandas as pd

s = pd.Series(['apple', 'banana', 'cherry'])
new_s = s.str.replace('apple', 'orange')
print(new_s)

0    orange
1    banana
2    cherry
dtype: object

import pandas as pd

s = pd.Series(['apple', 'banana', 'cherry'])
extracted_s = s.str.extract(r'(a\w+y)')
print(extracted_s)

       0
0  apple
1    NaN
2    NaN

import pandas as pd

s = pd.Series(['apple,banana', 'cherry,grape', 'orange'])
splitted_s = s.str.split(',')
print(splitted_s)

0    [apple, banana]
1    [cherry, grape]
2           [orange]
dtype: object

import pandas as pd

s = pd.Series(['apple', 'banana', 'cherry'])
first_char = s.str.get(0)
print(first_char)

0    a
1    b
2    c
dtype: object