Python:如何合并多个有条件的数据帧？

pip install pandas

import pandas as pd

# 创建第一个数据帧df1
data1 = {'A': [1, 2, 3], 'B': [4, 5, 6]}
df1 = pd.DataFrame(data1)

# 创建第二个数据帧df2
data2 = {'A': [4, 5, 6], 'B': [7, 8, 9]}
df2 = pd.DataFrame(data2)

condition = df1['A'] > 2
selected_rows = df1[condition]

df3 = pd.concat([selected_rows, df2])

print(df3)

import pandas as pd

# 创建第一个数据帧df1
data1 = {'A': [1, 2, 3], 'B': [4, 5, 6]}
df1 = pd.DataFrame(data1)

# 创建第二个数据帧df2
data2 = {'A': [4, 5, 6], 'B': [7, 8, 9]}
df2 = pd.DataFrame(data2)

# 选择满足条件的行
condition = df1['A'] > 2
selected_rows = df1[condition]

# 合并数据帧
df3 = pd.concat([selected_rows, df2])

# 打印合并后的数据帧
print(df3)