如何在分割2个整数时找到余数 [英] How can I find the remainder when dividing 2 integers
问题描述
我有一个字符串数组：
colors = [" #ff0000"，"＃00FF00"，"＃0000FF"]
colorIndex = 0;
我想通过每个颜色元素循环
for str in strings：
打印颜色[ colorIndex ++％colors.length]
但是当我执行脚本时出现无效的语法错误：
打印颜色[colorIndex ++％colors.length]
^
语法错误：语法无效
I have a string array:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0;
and I want to loop thru each element of colors
for str in strings:
print colors[colorIndex++ % colors.length]
But i get an invalid syntax error when I execute the script:
print colors[colorIndex++ % colors.length]
^
SyntaxError: invalid syntax
推荐答案
si *************** @ gmail.com schrieb：
我有一个字符串数组：
colors = [" #ff0000"，"＃00FF00"，"＃0000FF"]
colorIndex = 0;
我希望循环遍历每个颜色元素
str中的字符串：
打印颜色[colorIndex ++％colors.length]
但是我的语法无效执行脚本时出错：
打印颜色[colorIndex ++％colors.length]
^
SyntaxError：无效语法
I have a string array:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0;
and I want to loop thru each element of colors
for str in strings:
print colors[colorIndex++ % colors.length]
But i get an invalid syntax error when I execute the script:
print colors[colorIndex++ % colors.length]
^
SyntaxError: invalid syntax
Python没有后递减运算符。也不是预增量。
你必须发表一个声明，比如
colorIndex + = 1
在你的循环中。
Diez
Python doesn''t have the post-decrement-operator. Also not a pre-increment.
You have to put a statement like
colorIndex += 1
in your loop.
Diez
si *************** @ gmail.com 写道：
I有一个字符串数组：
colors = [" #ff0000"，"＃00FF00"，"＃0000FF"]
colorIndex = 0;
我想要循环遍历每个颜色元素
for str in strings：
打印颜色[colorIndex ++％colors.length]
但是当我执行时出现无效的语法错误脚本：
打印颜色[colorIndex ++％colors.length]
^
SyntaxError：语法无效
I have a string array:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0;
and I want to loop thru each element of colors
for str in strings:
print colors[colorIndex++ % colors.length]
But i get an invalid syntax error when I execute the script:
print colors[colorIndex++ % colors.length]
^
SyntaxError: invalid syntax
语法错误来自于你使用的++运算符不是modulo
运算符。 ++运算符在python中无效。
david lees
The syntax error comes from your use of the ++ operator not the modulo
operator. The ++ operator is not valid in python.
david lees
好的，我试试你的建议，然后重写我的代码是这样的：
colors = [" #ff0000"，"＃00FF00"，"＃0000FF"]
colorIndex = 0
def getText（nodelist）：
str为字符串的
：
打印颜色[colorIndex％colors.length]
colorIndex + = 1
但我收到此错误：
打印颜色[colorIndex％colors.length]
UnboundLocalError：局部变量''colorIndex''在
赋值之前引用
okay, I try you suggestion, and re-write my code like this:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0
def getText(nodelist):
for str in strings:
print colors[colorIndex % colors.length]
colorIndex += 1
but i get this error:
print colors[colorIndex % colors.length]
UnboundLocalError: local variable ''colorIndex'' referenced before
assignment
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