2#示例如下:3>>> tuple('hello','world')#参数是元组4Traceback (most recent call last):5File"<pyshell#52>", line 1,in<module>6tuple('hello','world')#参数是元组7TypeError: tuple() takes at most 1 argument (2given)8>>> tuple(('hello','world'))#参数是元组9('hello','world')10...
list函数:将一个元组作为参数,并把它转化为列表,如果参数是列表,将会原样返回: >>> list(1,2,3) #注意使用list时千万别忘了() Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> list(1,2,3) TypeError: list() takes at most 1 argument (3 given) >>> list((...
list函数:将一个元组作为参数,并把它转化为列表,如果参数是列表,将会原样返回: >>> list( 1,2,3) #注意使用list时千万别忘了()Traceback (most recent call last): File "", line 1, inlist(1,2,3)TypeError: list() takes at most 1 argument (3 given)>>> list((1,2,3))[1, 2, 3]>...
argument list: py> def f(x, y): ... print x, y ... py> f([1, 2]) Traceback (most recent call last): File "<interacti ve input>", line 1, in ? TypeError: f() takes exactly 2 arguments (1 given) py> f(*[1, 2]) 1 2 py> f(1, [2]) 1 [2] py> f(1, *[...
If you specify the optional index argument, then the item at that index is removed and returned. Note that index can be negative too: Python >>> a = ["a", "b", "c", "d", "e"] >>> a.pop(1) 'b' >>> a ['a', 'c', 'd', 'e'] >>> a.pop(3) 'e' >>> a ...
12.4 Variable-length argument tuples 参数长度可变的元组 Functions can take a variable number of arguments. A parameter name that begins with * gathers arguments into a tuple. For example, printall takes any number of arguments and prints them: ...
You can confirm this fact by using the built-in id() function, which takes an object as an argument and returns its identity. So, student_profile is an alias of student_info rather than a copy. Also, note how items at the same index position in both aliases share the same identity....
This article will walk you through the basics of Python tuples. Tuples are similar to lists, with the main difference being that the lists are mutable while the tuples are immutable.
>>> max(1, 2, 3) 3 But sum does not. >>> sum(1, 2, 3) TypeError: sum expected at most 2 arguments, got 3 As an exercise, write a function called sum_all that takes any number of arguments and returns their sum.12.5
s.append(1,2,3) TypeError: append() takes exactly one argument (3 given) 删 list.pop (索引) # 空默认为最后的, 有返回值 list.remove(元素) del list[0:-1] list.clear() 在遍历一个列表时,如果在遍历过程中改变了列表就会报错,处理方法是,应该将左边的列表复制 L1=L2[:],遍历复制后的列表,...