DataFrame 对某列求和、平均值、计数、最大值、最小值

import pandas as pd

# 创建示例 DataFrame
data = {
    'A': [1, 2, 3, 4, 5],
    'B': [10, 20, 30, 40, 50]
}
df = pd.DataFrame(data)

# 对列 'B' 求和
column_sum = df['B'].sum()
print("Sum of column B:", column_sum)

# 对某列求平均值
column_mean = df['B'].mean()
print("Mean of column B:", column_mean)

# 对某列计数
column_count = df['B'].count()
print("Count of column B:", column_count)

# 对某列求最大值
column_max = df['B'].max()
print("Max of column B:", column_max)

# 对某列求最小值
column_min = df['B'].min()
print("Min of column B:", column_min)