|(布尔或)示例 1(Python 窗口) 本例对两个输入栅格执行“布尔或”运算。 import arcpy from arcpy import env from arcpy.sa import * env.workspace = "C:/sapyexamples/data" outBooleanOr = Raster("degs") | Raster("negs") outBooleanOr.save("C:/sapyexamples/output/outboolor2") |(布尔或...
CONDITIONSstringnamebooleanvalueAND_CONDITIONSOR_CONDITIONScontainscontains 类图 同样,我们也可以用类图来展示and和or的类结构。 LogicalOperator+evaluateAnd(cond1: boolean, cond2: boolean)+evaluateOr(cond1: boolean, cond2: boolean) 结尾 通过上述步骤,你已经学习了如何在Python中使用and和or运算符来处理条件逻...
and evaluation stops as soon as the outcome is determined. For example, ifAandCare true butBis false,AandBandCdoes not evaluate the expressionC. When used as a general value and not as a Boolean, the return value of a short-circuit operator is the last evaluated...
想当然的以为 python 自己会做真值判断了。其实真值判断是在 if 条件语句时会生效,但在普通的 and 的运算符下有另外一个规则。2. python bool 类型简述“The Boolean type is a subtype of the integer type, and Boolean values behave like the values 0 and 1, respectively, in almost all contexts, the...
['__invert__'] = self._op_not self._op_raw['__neg__'] = self._op_neg # boolean ops self._op_raw['And'] = self._op_and self._op_raw['Or'] = self._op_or self._op_raw['Xor'] = self._op_xor self._op_raw['Not'] = self._op_boolnot self._cache_objects = ...
1.Using the Python or Operator (Overview)00:51 2.Boolean Logic00:58 3.Boolean Logic Relating to Python01:50 4.Python Boolean Operators00:46 5.How the Python or Operator Works01:09 6.Using or With Boolean Expressions02:18 7.Using or With Common Objects04:01 ...
BooleanOr example 1 (Python window) This example performs a Boolean Or operation on two Grid rasters. importarcpyfromarcpyimportenvfromarcpy.saimport*env.workspace="C:/sapyexamples/data"outBooleanOr=BooleanOr("degs","negs")outBooleanOr.save("C:/sapyexamples/output/outboolor2") ...
详解Python中的逻辑运算符and or 和not 总体解释 首先,‘and’、‘or’和‘not’的优先级是not>and>or。 其次,逻辑操作符and 和or 也称作短路操作符(short-circuitlogic)或者惰性求值(lazy evaluation):它们的参数从左向右解析,一旦结果可以确定就停止。例如,如果A 和C 为真而B 为假, A and B and C 不...
我可以使用以下命令来显示运算符的优先级：#!/usr/bin/python # -*- coding: UTF-8 -*- a = 20 b = 10 c = 15 d = 5 e = 0 e = (a + b) * c / d #( 30 * 15 ) / 5 print "(a + b) * c / d 运算结果为：", e e = ((a + b) * c) / d # (30 * 15 ) /...
You can connect two Boolean, or test, expressions by using the Booleanoroperator. For the entire expression to evaluate toTrue, at least one of the subexpressions must be true. If none of the subexpressions is true, the whole expression evaluates toFalse. For example, in the following e...