List
.concat()
python
import pandas as pd
# 合并多个 DataFrame（纵向堆叠）
df_list = [df1, df2, df3]
combined = pd.concat(df_list, ignore_index=True)
# 合并 Series（变成一列）
s1 = pd.Series(['A', 'B'])
s2 = pd.Series(['C', 'D'])
all_genes = pd.concat([s1, s2], ignore_index=True)
# 结果: ['A', 'B', 'C', 'D']python
squares = [1,2,3]
squares += [4,5,6]
#squares结果是：[1,2,3,4,5,6]