这与在函数签名(signature of a function)中使用 * 和** 是相反的。 在函数签名中,运算符的意思是在一个标识符中收集或打包可变数量的参数。 在调用(calling)中,它们的意思是解包(unpack)一个可迭代对象到多个参数中。 续上例,* 运算符将像 ["Welcome", "to"] 这样的序列解包到位置参数中。 类似地, *...
Packing a tuple: fruits = ("apple","banana","cherry") Try it Yourself » But, in Python, we are also allowed to extract the values back into variables. This is called "unpacking": Example Unpacking a tuple: fruits = ("apple","banana","cherry") ...
You can unpack tuples into multiple variables with the help of the comma and the assignment operator. Check out the following example to understand how your function can return multiple values: Note that the return statement return sum, a would have the same result as return (sum, a): the...
In [7]: print_vector(tuple_vec[0], ...: tuple_vec[1], ...: tuple_vec[2]) <1, 0, 1> 1. 2. 3. 4. Using a normal function call with separate arguments seems unnecessarily verbose and cumbersome. Wouldn’t it be much nicer if we could just “explode” a vector object into ...
结果为：1 int 输出的结果和类型完全不一样。一个是list而一个是list里的内容。这叫序列解包(unpack)...
Thankfully, there’s a better way to handle this situation in Python with Function Argument Unpacking In[8]:print_vector(*tuple_vec) <1,0,1>In[9]:print_vector(*list_vec) <1,0,1> Putting a * before an iterable in a function call will unpack ...
>>> *string = 'HelloWorld' SyntaxError: starred assignment target must be in a list or tuple 在python中,如果我们想把一个可迭代对象的所有元素解包到一个变量,我们应该用元组tuple,这时,我们在变量后加一个逗号,就可以了 >>> *string = 'HelloWorld' >>>string 'H', 'e', 'l', 'l', 'o', ...
In the above example, we send multiple keyword parameters to the function. They are unpacked at function call using the ** operator and used as required. The * operator in Python can also be used to unpack values from lists, tuples, and more. Similar to what we discussed, it can be ...
Unpacking a tuple in Python is the process by which you can extract the contents of a tuple into separate variables. There are two ways to unpack a tuple: 1. Using the assignment operator. 2. Using the destructuring (*) operator.
# Example: Unpack returned tuple def func(a, b): return a+b, a-b add, sub = func(3, 2) print(add) # 5 print(sub) # 1 1. 2. 3. 4. 5. 6. 7. 8. 9. 5 1 1. 2. 将函数赋值给变量 当Python运行def语句时,它将创建一个新的函数对象,并将其赋值给该函数的名称。