import shapefile


# 1.创建具有测量（M）值的Shapefile
w = shapefile.Writer('shapefiles/test/linem')
w.field('name', 'C')

w.linem([  # 3.2 为 w.linez(....)
    [[1, 5, 0], [5, 5], [5, 1, 3], [3, 3, None], [1, 1, 0]], # line with one omitted and one missing M-value
    [[3, 2], [2, 6]]  # line without any M-values
])
w.record('linem1')
w.close()

# 2.读取Shapefile的M值
r = shapefile.Reader('shapefiles/test/linem')  # the lower and upper bound of M-values in the shapefile
print(r)
print(r.bbox)
print(r.mbox)

print(r.shape())
print(r.shape(0))
print(r.shape(0).m)