Pandas逻辑运算

import pandas as pd

data = {'A': [1, 2, 3, 4, 5],
        'B': [5, 4, 3, 2, 1]}
df = pd.DataFrame(data)

# 比较运算，筛选出A列大于3的行
result = df[df['A'] > 3]
print(result)

import pandas as pd

data = {'A': [1, 2, 3, 4, 5],
        'B': [5, 4, 3, 2, 1]}
df = pd.DataFrame(data)

# 逻辑运算，筛选出A列大于3且B列小于3的行
result = df[(df['A'] > 3) & (df['B'] < 3)]
print(result)

import pandas as pd

data = {'A': [1, 2, 3, 4, 5],
        'B': [5, 4, 3, 2, 1]}
df = pd.DataFrame(data)

# 掩码操作，筛选出A列大于3的行
mask = df['A'] > 3
result = df[mask]
print(result)