Python/Pandas遍历列

import pandas as pd

# 创建一个示例DataFrame
data = {'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]}
df = pd.DataFrame(data)

# 遍历列并输出列名和列数据
for column_name, column_data in df.iteritems():
    print("列名:", column_name)
    print("列数据:", column_data)

列名: A
列数据: 0    1
       1    2
       2    3
Name: A, dtype: int64
列名: B
列数据: 0    4
       1    5
       2    6
Name: B, dtype: int64
列名: C
列数据: 0    7
       1    8
       2    9
Name: C, dtype: int64

import pandas as pd

# 创建一个示例DataFrame
data = {'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]}
df = pd.DataFrame(data)

# 遍历列索引并输出列名和列数据
for column_index in df.columns:
    column_name = df.columns[column_index]
    column_data = df[column_name]
    print("列名:", column_name)
    print("列数据:", column_data)