如何在Python的eval中使用for循环(或具有缩进的内容

data = [1, 2, 3, 4]
result = eval("[x * 2 for x in data]")
print(result)  # 输出：[2, 4, 6, 8]

def multiply_by_two(x):
    return x * 2

data = [1, 2, 3, 4]
result = eval("multiply_by_two(data[0])")
print(result)  # 输出：2

data = [1, 2, 3, 4]
result = []

code = """
for x in data:
    result.append(x * 2)
"""

exec(code)
print(result)  # 输出：[2, 4, 6, 8]