在python中如何在没有[]的情况下获得输出，在没有[none]的情况下如何获得输出

x = "Hello World"
output = x[:]
print(output)  # 输出：Hello World

x = "Hello"
y = "World"
output = x + y
print(output)  # 输出：HelloWorld

x = "World"
output = "Hello {}".format(x)
print(output)  # 输出：Hello World

x = "Hello"
y = "World"
print(x, y)  # 输出：Hello World

x = None
if x is None:
    output = "Variable is None"
else:
    output = x
print(output)  # 输出：Variable is None

x = None
output = "Variable is None" if x is None else x
print(output)  # 输出：Variable is None

def get_output(x=None):
    return "Variable is None" if x is None else x

output = get_output()
print(output)  # 输出：Variable is None