关于函数的参数

redersun

比如quiverm函数，其帮助文档如下：

quiverm(*args, **kwargs)
    Plot a 2-D field of arrows in a map.

    :param x: (*array_like*) Optional. X coordinate array.
    :param y: (*array_like*) Optional. Y coordinate array.
    :param u: (*array_like*) U component of the arrow vectors (wind field) or wind direction.
    :param v: (*array_like*) V component of the arrow vectors (wind field) or wind speed.
    :param z: (*array_like*) Optional, 2-D z value array.
    :param levs: (*array_like*) Optional. A list of floating point numbers indicating the level
        vectors to draw, in increasing order.
    :param cmap: (*string*) Color map string.
    :param fill_value: (*float*) Fill_value. Default is ``-9999.0``.
    :param isuv: (*boolean*) Is U/V or direction/speed data array pairs. Default is True.
    :param size: (*float*) Base size of the arrows.
    :param proj: (*ProjectionInfo*) Map projection of the data. Default is None.
    :param zorder: (*int*) Z-order of created layer for display.
    :param select: (*boolean*) Set the return layer as selected layer or not.

    :returns: (*VectoryLayer*) Created quiver VectoryLayer.




其调用示例如下：
f = addfile('D:/Temp/GrADS/model.ctl')u = f['U'][0,'500','10:60','60:140']
v = f['V'][0,'500','10:60','60:140']
speed = sqrt(u*u+v*v)#Plot
axesm()
lworld = shaperead('D:/Temp/Map/country1.shp')
geoshow(lworld)
layer = quiverm(u, v, speed, 10, size=8)
quiverkey(layer, 0.74, 0.18, 15, bbox={'edge':True, 'fill':True})
colorbar(layer)
title('Wind field')
yticks([20,40,60])
上面调用quiverm函数的示例中，size=8是关键字参数，那么它前面的参数都应该是位置参数了，那么实参u，v，speed，10对应的形参分别是哪个？为什么？

MeteoInfo

如果 U, V 是 DimArray （自带各维的值），x, y 坐标信息可以省略。具体可以看源代码：https://github.com/meteoinfo/Met ... axes.py#L1411-L1500

redersun

看了一下代码，虽然看不太懂，但参数处理那块看明白了，程序会根据参数的数量及类型自动进行处理，感谢老师的指点