ArcGIS Pro M value tools: Is "Set Direction As M" in arcpy?

Question

ArcGIS Pro has tools for working with M values. Are these functionalities available in arcpy?

Anonymous User · Accepted Answer

Think you'll have to do it manually with a cursor and extracting the m from the point.  Stealing a post from SO

lyr = r"C:\Users\...\Default.gdb\TEST_ROUTE"  
fields = ['SHAPE@']

with arcpy.da.UpdateCursor(lyr, fields) as cursor:
    for row in cursor:
        partslist = []
        partlist = []
        array = None
        feat = row[0]
        partnum = 0

# Count the number of points in the current multipart feature  
        partcount = feat.partCount  
        pntcount = 0

# Enter while loop for each part in the feature (if a singlepart feature  
        # this will occur only once)  
        #  
        while partnum < partcount:  
            part = feat.getPart(partnum)  
            pnt = part.next()

# Enter while loop for each vertex  
            #  
            while pnt:  
                pntcount += 1  
                if not numpy.isnan(pnt.M):
                    partlist.append(arcpy.Point(pnt.X, pnt.Y, pnt.Z, pnt.M / 1000))
                pnt = part.next()

# If pnt is null, either the part is finished or there is an   
                # interior ring  
                #  
                if not pnt:   
                    pnt = part.next()  
            partslist.append(arcpy.Array(partlist))
            array = arcpy.Array(partslist)
            partlist = []
            partnum += 1
        polylinefeat = arcpy.Polyline(array)
        row[0] = polylinefeat
        cursor.updateRow(row)