BUG-000140734 for ArcGIS Pro

漏洞 ID 编号	BUG-000140734
已提交	June 15, 2021
上次修改时间	March 20, 2025
适用范围	ArcGIS Pro
找到的版本	2.8
操作系统	Windows OS
操作系统版本	10.0 64 Bit
状态	Will Not Be Addressed

附加信息

This is a quirk of the is the operator in Python (which checks whether two objects point to the same memory), and how strings are stored (equivalent alphanumeric strings like 'Texas' point to the same object in memory when invoked, strings such as 'South Dakota' do not point to the same object in memory. The top answer at https://stackoverflow.com/questions/16756699/is-operator-behaves-differently-when-comparing-strings-with-spaces describes this well). String equality has to be checked using == (which checks for value equality) for this reason.

解决办法

It is to be noted other operators can be used in the scenario to return the results when matching them up with the fields having values of either spaces or some other special characters.

Expression 1:

def Reclass(value1):

if value1 == 'South Dakota':

return 1

else:

return 0

Expression 2:

def Reclass(value1):

if 'South Dakota' in value1:

return 1

else:

return 0