Latest Contributions by JamesHood

Lists, Arrays, and Tuples! I have a complicated script and a complicated problem. I have simplified it down to the following example: I grab a field from a shapefile using updatecursor and input the field values into a list: list = ["111-11-1","222-22-2","333-33-3"] I need to split these lists up into integers so i can do some math on the first column of each string. (need to add 180 if < 180, and need to subtract 180 if > 180.) for l in list:     splitlist.append(l.split("-")) print splitlist for segment in splitlist:     print segment Result: [['111', '11', '1'], ['222', '22', '2'], ['333', '33', '3']] ['111', '11', '1'] ['222', '22', '2'] ['333', '33', '3'] So I am able to isolate the values I need to perform the math on, but how do I call them to a variable and then insert them back in? Here is a copy of my full code for this problem, with the third segment being my failed attempt at 2 d arrays. list = ["111-11-1","222-22-2","333-33-3"] splitlist=[] for l in list:     splitlist.append(l.split("-")) print splitlist records=0 for split in splitlist:     records=records+1     print split     columns=3 for j in range(records):     for i in range(columns):         current = splitlist[[records],[columns]]         splitarray[[records],[columns]].append(current)         print current         print splitarray[[records],[columns]] Error Message: line 25, in <module>     current = splitlist[[records],[columns]] TypeError: list indices must be integers, not tuple I found an exceptional resource here but it doesn't help with this problem: http://www.astro.ufl.edu/~warner/prog/python.html Any advice? ... View more

Hello, First my of my experience with python is in 9.3x and I only just started on arc10 and arcpy last week! This means I am Newb all over again. I have a large dataset that contains latitude and longitude fields. These fields are stored as such: 111-22-22, 23-4-55, 33-3-3 etc, For labeling purposes we would like to convert and store these in their standard display format as such: 103°22'77" I have encountered a number of issues and am now doubting if this is possible. I would like to solve how to join two lists, however. Essentially I have done the following: Update_cursor = arcpy.UpdateCursor(feature_class) For rows in update cursor:     coord = rows.latitude     courd_list = coord.split("-")  #This should print something like ["000", "00", "00"]     Symbol_list = ["°", "'", "''"] So what I would like to do is join the coord_list with the symbol_list but not just join, splice.... In theory it would give me the result I need. I went about it many different ways and when each one failed, I seem to have erased them and moved on to the next which is a shame because I would have liked to have shared with you my process. One method that I think might be the answer is the following which I gleaned from the old forums but I can't remember who suggested it and I have deleted the link already : symbol = ["°", "'", "''"] values = ["100-22-111", "12-232-22", "33-3-33", "993-34-7"] testSet1 = set() for v in values:    testSet1.add(v) testSet2 = set() for s in symbol:    testSet2.add(s) print set.union(testSet1, testSet2) PRINTS  set(["''", '12-232-22', "'", '\xb0', '100-22-111', '33-3-33', '993-34-7']) My Problems: This would seem to work EXCEPT even though I asked python to union set1 then set2, it seems to union in reverse. Specifically, the symbols set, set2, is unioned in reverse, putting the ° at the end and the '' at the beginning... I could fix both of these I guess by formatting my code but what if it is not consistant? The character ° does not seem to be supported by python, can anybody confirm this? In my test result , the ° is converted to \xb0. Is there an ascii or some other module to import so that python will support it? Finally, if I am able to ge the lists to properly union, I will need to output them to a single starting from position 1 in the list and moving to the last , before I can re assign this to the new field in the table. For some reason I can't figure out how to output multiple instances in a List to create 1 back to back string. I appriciate any ideas or comments! Thanks James ... View more