AttributeError: jupyter notebook上的“NoneType”对象没有属性“shape”

import numpy as np

# 错误示例
data = None
print(data.shape)  # 这会引发 AttributeError

# 正确示例
data = np.array([1, 2, 3])
print(data.shape)  # 输出 (3,)

import numpy as np

def load_data():
    # 模拟数据加载失败
    return None

data = load_data()
if data is not None:
    print(data.shape)
else:
    print("数据加载失败")

import numpy as np

def get_data():
    # 模拟数据加载
    return np.array([1, 2, 3])

data = get_data()
try:
    print(data.shape)
except AttributeError as e:
    print(f"发生错误: {e}")

import numpy as np

def load_data():
    # 模拟数据加载
    return np.array([1, 2, 3])

data = load_data()
print(f"data 的类型是: {type(data)}")
if isinstance(data, np.ndarray):
    print(data.shape)
else:
    print("数据不是预期的NumPy数组")