If updating a geodatabase table, your cursor would need to look something like this: mytable = r'test.gdb\mytable'Īrcpy.AddField_management(mytable, 'diff90_10', 'LONG') Your fields are as per your table example, although even that would probably fail as ArcGIS doesn't like spaces in field names. Population here should be referring to your Table, not to a field. cursor = arcpy.da.UpdateCursor(population, )
If this was a geodatabase table or feature class, you could use something like arcpy.AddField_management(mytable, 'diff90_10', 'LONG') to add your new field.
This will not add your extra column - An Arcpy cursor's Insert Row adds a new row (record), rather than a new field/column.
Python lists export to excel file update#
If it doesn't need to be Excel, I would export the Excel file into a new geodatabase table, that way arcpy and Update Cursor would work.Ī few extra points to note about your code snippet cursor.insertRow() See Edit existing excel workbooks and sheets with xlrd and xlwt on Stack Overflow for using xlutils in python to modify an Excel File. Looking at your code, there probably isn't any need for Arcpy here, you should be able to do the updates you require using Python without arcpy. If you need to keep it as Excel Files you will need to use Python Excel modules such as xlwt and xlutils. RuntimeError was unhandled by user code Message: Multiple-step OLE DB You will get error messages if trying to access an Excel file using an arcpy Update Cursor, but you can use Search Cursors to read data from an Excel file.Įrror I get using Update Cursor on an Excel file:
However, you will not be able to edit the tableĮxcel tables are read-only in ArcGIS as well as in Excel when you have Once added to ArcMap, you can open the table from the Source view of
Python lists export to excel file how to#
No, you cannot modify an Excel file from ArcGIS (including Arcpy).įrom Understanding how to use Microsoft Excel files in ArcGIS: Runtime error Traceback (most recent call last): File "", line 9, inįile "C:\Python27\ArcGIS10.4\lib\site-packages\xlrd_init_.py", lineģ94, in open_workbook f = open(filename, "rb") IOError: No Worksheet = workbook.sheet_names('sheet1')Ĭursor = arcpy.da.UpdateCursor(population, ) Workbook = xlrd.open_workbook('test.xlsx') I have the below code so far but I'm getting errors: import arcpyĮnv.workspace=r'C:\Users\Kevin\Desktop\Geoprograming\week_four' counties from one year to another and writes that information to a new field in a xlxs file.Ĭan it be done with ArcPy and what would the code look like?īelow is a sample of the xlxs data with the column names: Area_name, Resident population 1990, Resident population 2000, Resident population 2010 I am writing a Python script that finds the difference between populations for U.S.
0 kommentar(er)
