当max()函数的iterable参数为空时,Python会抛出一个ValueError异常,错误信息是“max() iterable argument is empty”。这是因为max()函数无法从一个空的可迭代对象中确定最大值。 例如: python numbers = [] max_value = max(numbers) # 这里会抛出 ValueError: max()
Python内置函数(3)——max 英文文档:max(iterable, *[, key, default])max(arg1, arg2, *args[, key])Return the largest item in an iterable or the largest of two or more arguments.If one positional argument is provided, it should be an iterable. The largest item in the iterable is ...
我在Python 中编写了max来更容易地看到它的工作方式和重载注释之间的关系(内置的max是用 C 编写的);参见 Example 15-2。 Example 15-2.mymax.py:max函数的 Python 重写 # imports and definitions omitted,see next listingMISSING=object()EMPTY_MSG='max() arg is an empty sequence'# overloaded type hin...
'high':'max','low':'min','close':'last','vol':'sum'}).copy()### worksdfm=df.resample('2H',on='time').agg({'time':'last','open':'first','high':'max','low':'min','close':'last','vol':'sum'}).copy() save
init__(self,iterable):print(self)print(iterable)# f_it = (e for e in iterable if isinsta...
iterable must be another object that supports | iteration. The enumerate object yields pairs containing a count (from | start, which defaults to zero) and a value yielded by the iterable argument. | enumerate is useful for obtaining an indexed list: | (0, seq[0]), (1, seq[1]), (2...
9.max 10.min 11.pow 12.print 13.range 14.repr 15.reversed 16.round 17.sorted 18.str 19.sum 20.tuple 21.type 按字母顺序排名,是否还能想起他们的功能?参数用法? 下面再介绍第二类内置函数: 1.all # 参数iterable:可迭代对象;全为真返回True,否则返回False ...
If called, the method calls the function, implicitly passing the bound object as the first argument (this is how we get self as the first argument, despite not passing it explicitly).>>> o1.method <bound method SomeClass.method of <__main__.SomeClass object at ...>>...
If maxsplit is given, at most maxsplit 355 splits are done. If sep is not specified or is None, any 356 whitespace string is a separator and empty strings are 357 removed from the result. 358 """ 359 return [] 360 361 def splitlines(self, keepends=None): # real signature unknown;...
(order)) 450 self.k_ar = k_ar = order[0] 451 self.k_ma = k_ma = order[1] 452 self.k_lags = max(k_ar, k_ma+1) 453 self.constant = 0 #Added by me 454 if exog is not None: 455 if exog.ndim == 1: 456 exog = exog[:, None] 457 k_exog = exog.shape[1] ...