努比。Python中的any（）-yiteyi-C++库

这个 努比。任何（） 函数测试沿上述轴的任何数组元素的计算结果是否为真。 语法：

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numpy.any(a,
          axis = None,
          out = None,
          keepdims = class numpy._globals._NoValue at 0x40ba726c)

参数：

array    :[array_like]Input array or object whose elements, we need to test.
axis     : [int or tuple of ints, optional]Axis along which array elements 
     are evaluated.
     The default (axis = None) is to perform a logical AND over all the dimensions of the input
     array. Axis may be negative, in which case it counts from the last to the first axis.
out      : [ndarray, optional]Output array with same dimensions as Input array, 
     placed with result
keepdmis : [boolean, optional]If this is set to True, the axes which are 
     reduced are left in the result as dimensions with size one. With this option, the result 
     will broadcast correctly against the input array.
     If the default value is passed, then keepdims will not be passed through to the all 
     method of sub-classes of ndarray, however any non-default value will be. If the 
     sub-classes sum method does not implement keepdims any exceptions will be raised.

返回：

A new Boolean array as per 'out' parameter

代码1：

                       # Python Program illustrating                     
                       # numpy.any() method                     
                                
                       import                                  numpy as geek                     
                                
                       # Axis = NULL                     
                       #  True    False                     
                       #  True    True                     
                       #  True  : False  =  True (OR)                     
                                
                       print                                  (                                  "Bool Value with axis = NONE  : "                                  ,                     
                                             geek.                                  any                                  ([[                                  True                                  ,                                  False                                  ],[                                  True                                  ,                                  True                                  ]]))                     
                                
                       # Axis = 0                     
                       #  True    False                     
                       #  True    True                     
                       #  True  : False                     
                       print                                  (                                  "Bool Value with axis = 0  : "                                  ,                     
                                             geek.                                  any                                  ([[                                  True                                  ,                                  False                                  ],[                                  True                                  ,                                  True                                  ]], axis                                  =                                  0                                  ))                     
                                
                       print                                  (                                  "Bool : "                                  , geek.                                  any                                  ([                                  -                                  1                                  ,                                  4                                  ,                                  5                                  ]))                     
                                
                                
                       # Not a Number (NaN), positive infinity and negative infinity                     
                       # evaluate to True because these are not equal to zero.                     
                       print                                  (                                  "Bool : "                                  , geek.                                  any                                  ([                                  1.0                                  , geek.nan]))                     
                                
                       print                                  (                                  "Bool Value : "                                  , geek.                                  any                                  ([[                                  0                                  ,                                  0                                  ],[                                  0                                  ,                                  0                                  ]]))                     

输出：

Bool Value with axis = NONE  :  True

Bool Value with axis = 0  :  [ True  True]

Bool :  True

Bool :  True

Bool Value :  False

代码2：

                       # Python Program illustrating                     
                       # numpy.any() method                     
                                
                       # Parameter : keepdmis                     
                                
                       import                                  numpy as geek                     
                                
                       # setting keepdmis = True                     
                       print                                  (                                  "Bool Value : "                                  , geek.                                  any                                  ([[                                  1                                  ,                                  0                                  ],[                                  0                                  ,                                  4                                  ]],                                  True                                  ))                     
                                
                                
                       # setting keepdmis = True                     
                       print                                  (                                  "Bool Value : "                                  , geek.                                  any                                  ([[                                  0                                  ,                                  0                                  ],[                                  0                                  ,                                  0                                  ]],                                  False                                  ))                     

输出：


Bool Value :  [ True  True]

Bool Value :  [False False]
VisibleDeprecationWarning: using a boolean instead of an integer 
will result in an error in the future
return umr_any(a, axis, dtype, out, keepdims)

参考资料： https://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.any.html#numpy.any

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