怎么数不清。pandas dataframe中相同字符串的

import pandas as pd

# 创建一个包含字符串的DataFrame
data = {'col1': ['apple', 'banana', 'apple', 'orange', 'banana']}
df = pd.DataFrame(data)

# 使用value_counts()函数统计相同字符串的数量
counts = df['col1'].value_counts()

print(counts)

apple     2
banana    2
orange    1
Name: col1, dtype: int64