numpy.random.randint用法解析

参看官网： https://docs.scipy.org/doc/numpy/reference/generated/numpy.random.randint.html

 

 

numpy.random.randint(low, high=None, size=None, dtype='l')

Return random integers from low (inclusive) to high (exclusive).

Return random integers from the “discrete uniform” distribution of the specified dtype in the “half-open” interval [low, high). If high is None (the default), then results are from [0, low).

Parameters:

low : int Lowest (signed) integer to be drawn from the distribution (unless high=None, in which case this parameter is one above the highest such integer). high : int, optional If provided, one above the largest (signed) integer to be drawn from the distribution (see above for behavior if high=None). size : int or tuple of ints, optional Output shape. If the given shape is, e.g., (m, n, k), then m * n * k samples are drawn. Default is None, in which case a single value is returned. dtype : dtype, optional Desired dtype of the result. All dtypes are determined by their name, i.e., ‘int64’, ‘int’, etc, so byteorder is not available and a specific precision may have different C types depending on the platform. The default value is ‘np.int’. New in version 1.11.0.

Returns:

out : int or ndarray of ints size-shaped array of random integers from the appropriate distribution, or a single such random int if size not provided.

现主要说一下 low和high的用法，由以上可知 high默认none.

针对参数 low,上面也说了， 如果 默认 high不传值，则 此时 low即为 最大值上限（不包括该值）

 

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