How python extracts the central coordinates 5 in a set of points

The shackle furnace material is a little more talkative.

Create a display group that only contains the node set, this node set may not be displayed, but with probe value you can output all the node numbers and their corresponding coordinates in this invisible display group In addition, in the main menu bar of the display module, the result can be output, the specific operation is a little forgotten, you can follow the prompts to operate Good luck!

First of all, for your initial question, max(i for i in roudict) (or even max(roudict)) will be fine if roudict fits the (, format).

Then it's a bit awkward to use a dictionary to store coordinates, and it's more natural to use lists and more abstract classes, but I'm not good at OOP ......For list storage, the integration function can be changed to such a thing (lop(list of points) is a list of points set).

def integral(lop):

prev, i = (none, none), 0 #initialize

for (x, y) in lop:

if prev: #

x0, y0), prev = prev, (x, y)i += (y0 + y) *x - x0) / 2else:

prev = x, y

return i

# way to access max_x of lop:

max(x for (x, y) in lop)

What type of roudict is needs to be explained. It's python's built-in set()?

If you have a python interface in your GIS, see the documentation. If not, you can export the GIS data to Vector format. Then use python to parse this text file.

lines are tuples of the coordinates of the two endpoints of each line in the graph you obtained. Such as(((0,0),(1,1))(0,2),(1,3))....

for line in lines:

p0, p1 = line

You can iterate through the points (p0[0], p1[0]), p0[1], p1[1]) is the value of the line.

Don't quite understand if you have a lot of straight lines in the graph, do you want to choose the beginning and end values of the straight line, or just a straight line, read the points of the straight line?