Tuple assignment allows for a curious bit of idiomatic Python. Sometimes, when programming, you have two variables whose values you need to swap. In most programming languages, it’s necessary to store one of the values in a temporary variable while the swap occurs. Consider the following examp...
Tuple Assignment, Packing, and Unpacking(赋值、打包和解包)Lists and tuples are arguably Python’s most versatile, useful data types. You will find them in virtually every nontrivial Python program.Here’s what you’ll learn in this tutorial: You’ll cover the important characteristics of lists...
5 tuple和list是非常相似的数据类型，差别是tuple创建了以后其中的元素不能修改。>>> a[0]=2Traceback (most recent call last): File "<pyshell#6>", line 1, in <module> a[0]=2TypeError: 'tuple' object does not support item assignment 6 因为tuple不能修改，所以它没有list的.app...
修改tuple时,提示TypeError: ‘tuple’ object does not support item assignment 可能原因: 1、tuple内的元素是不可以修改的,除非tuple内部再嵌套了list,可以修改list内部的元素 解决方法: 1、tuple不能修改元素,无解。如果要修改元素,改用list类型。
"tuple assignment index out of range"); return -1; } p = ((PyTupleObject *)op) -> ob_item + i; olditem = *p; *p = newitem; Py_XDECREF(olditem); return 0; } 释放元组内存空间 当我们在进行垃圾回收的时候,判定一个对象的引用计数等于 0 的时候就需要释放这块内存空间(相当于析构函数...
python tuple 方法/步骤 1 首先什么是python的元组呢？简单来说：元组就是由逗号分隔的多个值组成，例如：t1=('py','java','c','baidu')t2=('2','5','c','baidu')t1,t2就是元组 2 我们将以上元组输出看看：...
t 变成[1,2, [30,40,50,60] 2. TypeError is raised with the message 'tuple' object does not support item assignment 3. Neither 1 nor 2 4. Both 1 and 2按照之前的理解, tuple里面的元素是不能被修改的,因此会选2. 如果真是这样的话,这篇笔记就没必要了,Fluent Python中也就不会拿出一节来...
>tuple1=(1,2,3,4,5,6)>>>tuple1(1,2,3,4,5,6)>>>tuple1[3]4>>>tuple1[3:](4,5,6)>>>tuple1[::-1](6,5,4,3,2,1)>>>tuple1[2]=6Traceback(most recent call last):File"<pyshell#15>",line1,in<module>tuple1[2]=6TypeError:'tuple'objectdoesnotsupport item assignment...
intPyTuple_SetItem(PyObject*op,Py_ssize_t i,PyObject*newitem){PyObject**p;if(!PyTuple_Check(op)||op->ob_refcnt!=1){Py_XDECREF(newitem);PyErr_BadInternalCall();return-1;}if(i<0||i>=Py_SIZE(op)){Py_XDECREF(newitem);PyErr_SetString(PyExc_IndexError,"tuple assignment index out ...
# File "tuple20190909.py", line 22, in <module> # t1[1]=2 # TypeError: 'tuple' object does not support item assignment 1. 2. 3. 4. 5. 6. 7. 8. 刚刚我们是修改一个元组对象是不可行的,但是,注意下面例子修改是可行的。 t1=(1,2,3) ...