I'm thinking this can be accomplished using an "If" statement and probably a loop; however, I'm not sure what exactly to write and how to bring it all together. Here is the top portion of my code for January and
SelectPython 3forExpression Type. In theExpressiontext box above theCode Blockbox, enter the following script: def calc(X1, X2): if X1 == 0: return X1 else: return X2 Change the value of the field if it meets the criteria of two fields An IF statement can be used to chan...
有关math模块的更多细节可以通过单击“All Programs | ArcGIS | Python 2.7 | Python Manuals”来查看。打开Python Manual后,在目录栏里单击“The Python Standard Library | Numeric and Mathematical Modules”,你就可以查看任何的数据类型、语法、内置函数以及其他想详细了解的内容了,在此不一一赘述。 4.列表 Python...
你可以通过命令行窗口进入python在交互式解释器中开始编写Python代码。 在交互式编译器中编写代码和编写脚本不同。在Python Shell的菜单栏中,单击File>New windows , 就打开了一个名为Untitled 的新窗口。 在菜单栏单击File>Save As , 然后将脚本命名为hello.py。.py 是脚本文件的后缀名。点击Run>Run Moudule(或者...
本书以基础理论结合GIS开发实例的方式,循序渐进地介绍了Python在ArcGIS开发中的基本应用和相关技巧,以基本知识开始,陆续简洁了地图文档和地图层的管理、找到并修复一些破损数据,本书还致力于更好地实现ArcGIS内部任务的自动化。全书内容结构清晰,示例完整,适合各类和GIS开发相关的读者参考学习。 图书...
One common cause of syntax errors in Python 2 is the conversion of the print statement to the print function. Fortunately, the print function has been backported to Python 2 and can be safely used in Python 2 and 3. print('This will print safely in Python 2 and 3') # print statements...
Python 是一种不受局限、跨平台的开源编程语言,它功能强大且简单易学。 Python 已延伸到 ArcGIS 中,成为了一种用于进行数据分析、数据转换、数据管理和地图自动化的语言,因而有助于提高工作效率。要使用Python,首要的就是了解其基本的语法。 脚本文件点此下载。
Spelling and case matter when setting properties in Python. Assigning a value to arcpy.env.Workspace is not the same as setting arcpy.env.workspace. (Note: arcpy.env.workspace is the correct form.) If you set an environment but are not seeing the effect on subsequent tools, check the spell...
NIM076153 - The Select by Location tool used on multiple layers will be run on the full extent of a feature class if the selected set is stored in the ArcSDE logfile tables. NIM076186 - The Join Field geoprocessing tool called from Toolbox or Python results in null values for some reco...
Here is an example of the IN statement using a list of numeric values. { "filter": { "where": "alertCode IN (404,500,505)" } } It is also possible to use a Boolean field in place of a Boolean expression. So, for example, if your features contain a field named active that has...