我有一段代码：
binCounts = []
for i in range(len(bins)):
binCounts.append(0)
其中bins是一个如下所示的数组：
['chrY', '28626328', '3064930174', '28718777', '92449', '49911'], ['chrY', '28718777', '3065022623', '28797881', '79104', '49911'], ['chrY', '28797881', '3065101727', '59373566', '30575685', '49912']]
当我在Python的交互模式中运行range(len(bins))时，我得到：
[0, 1, 2]
但是当我测试整段代码时，我正在
[0,0,0]
我相信我应该得到
[0, 1, 2, 0]
这导致稍后在线上出现除零错误。为什么会这样？我该如何解决？我感谢你的指导！
答案 0 :(得分：3)
您的代码将0添加到列表中3次，这样您就可以得到您所要求的内容。也许你想做：
binCounts = []
for i in range(len(bins)):
binCounts.append(i)
binCounts.append(0)
答案 1 :(得分：2)
由于这一行，您收到一个零列表：
binCount每次循环时，都会将{0}加到for
如果您的目标是仅在列表末尾添加零，请将该行从for i in range(len(bins)):
# Logic
binCounts.append(0)
循环中拉出来
bins您似乎正在创建一个列表，其值范围为0到for的长度。您可以在没有binCounts = range(len(bins))
binCounts.append(0)
循环的情况下执行此操作：
binCounts在这两行的末尾，[0, 1, 2, 0]
将是：
@Override
protected void onDraw(Canvas canvas){
//Get points for bounding view
//Pad = space between polygons
//leftX = Left bound of parent view
//rightX = Right bound of parent view
//topY = Top bound of parent view
//bottomY = Bottom bound of parent view
//width = Width of a single polygon before transform
//peak = How far a polygon will reach into the space of another polygon after transform (1/3 polygon width)
//tip = peak with padding taken into account
// var context = UIGraphicsGetCurrentContext()
// var pad:CGFloat = (CGFloat)(Numbers.APPLICATIONPADDING)
// var leftX:CGFloat = (CGFloat)(self.bounds.origin.x)
// var rightX:CGFloat = (CGFloat)(self.bounds.size.width)
// var topY:CGFloat = (CGFloat)(self.bounds.origin.y)
// var bottomY:CGFloat = (CGFloat)(self.bounds.size.height)
// var width:CGFloat = (CGFloat)(self.bounds.width) / (CGFloat)(applications.count)
// var peak:CGFloat = width/3.0
// var tip:CGFloat = peak - pad
//
//Draw all applications
// var appNum:CGFloat = 1.0
// var appCount:CGFloat = (CGFloat)(applications.count)
// var endTopX:CGFloat = 0.0
// var endBottomX:CGFloat = 0.0
// var temp:CGFloat!
// var textRightX:CGFloat = 0.0
// var textLeftX:CGFloat = 0.0
// var label:UILabel!
if(applications.length > 0){
//float density = getContext().getResources().getDisplayMetrics().density;
int appNum = 1;
int appCount = applications.length;
float endTopX = 0;
float endBottomX = 0;
float textRightX = 0;
float textLeftX = 0;
float pad = 10;
float leftX = 0;
float rightX = viewWidth;
float topY = 0;
float bottomY = viewHeight;
float width = viewWidth / applications.length;
float peak = viewWidth / 3;
float tip = peak - pad;
String colorS;
// for app in applications{
for(ApplicationWithNotes app : applications){
path.reset();
// if(app.color != nil){
// CGContextSetFillColorWithColor(context, app.color!.CGColor)
// }
// else{
// CGContextSetFillColorWithColor(context, Colors.PARTCOLORDEFAULT.CGColor)
// }
//Each polygon will breach into the space of the next and the previous after transform by the tip with a given padding
//Each text field will stretch across the middle of each polygon with a small padding (3) to prevent overreaching
// if(appNum == 1 && applications.count == 1){
// CGContextMoveToPoint(context, leftX, topY)
// CGContextAddLineToPoint(context, width, topY)
// CGContextAddLineToPoint(context, width, bottomY)
// CGContextAddLineToPoint(context, leftX, bottomY)
// }
if(appNum == 1 && applications.length == 1){
path.moveTo(leftX, topY);
path.lineTo(width, topY);
path.lineTo(width, bottomY);
path.lineTo(leftX, bottomY);
path.close();
borderPath.moveTo(leftX, topY);
borderPath.lineTo(width, topY);
borderPath.lineTo(width, bottomY);
borderPath.lineTo(leftX, bottomY);
borderPath.close();
textLeftX = 0;
textRightX = viewWidth;
}
// if(appNum == 1){
// CGContextMoveToPoint(context, leftX, topY)
// CGContextAddLineToPoint(context, width + tip, topY)
// CGContextAddLineToPoint(context, width - peak, bottomY)
// CGContextAddLineToPoint(context, leftX, bottomY)
// textLeftX = leftX + (leftX - leftX) / 2 + 3
// textRightX = (width - peak) + ((width + tip) - (width - peak)) / 2.0 - 10
// endTopX = width + tip
// endBottomX = width - peak
// }
else if(appNum == 1){
path.moveTo(leftX, topY);
path.lineTo(width + tip, topY);
path.lineTo(width - peak, bottomY);
path.lineTo(leftX, bottomY);
path.close();
borderPath.moveTo(leftX, topY);
borderPath.lineTo(width + tip, topY);
borderPath.lineTo(width - peak, bottomY);
borderPath.lineTo(leftX, bottomY);
borderPath.close();
textLeftX = leftX + (leftX - leftX) / 2 + 3;
textRightX = (width - peak) + ((width + tip) - (width - peak)) / 2 - 10;
endTopX = width + tip;
endBottomX = width - peak;
}
// else if(appNum == appCount){
// CGContextMoveToPoint(context, endTopX + pad, topY)
// CGContextAddLineToPoint(context, rightX, topY)
// CGContextAddLineToPoint(context, rightX, bottomY)
// CGContextAddLineToPoint(context, endBottomX + pad, bottomY)
// textLeftX = (endBottomX + pad) + ((endTopX + pad) - (endBottomX + pad)) / 2.0 + 10
// textRightX = rightX + (rightX - rightX) / 2.0 - 10
// endTopX = width
// endBottomX = width
// }
else if(appNum == appCount){
path.moveTo(endTopX + pad, topY);
path.lineTo(rightX, topY);
path.lineTo(rightX, bottomY);
path.lineTo(endBottomX + pad, bottomY);
path.close();
borderPath.moveTo(endTopX + pad, topY);
borderPath.lineTo(rightX, topY);
borderPath.lineTo(rightX, bottomY);
borderPath.lineTo(endBottomX + pad, bottomY);
borderPath.close();
textLeftX = (endBottomX + pad) + ((endTopX + pad) - (endBottomX + pad)) / 2 + 10;
textRightX = rightX + (rightX - rightX) / 2 - 10;
endTopX = width;
endBottomX = width;
}
// else{
// CGContextMoveToPoint(context, endTopX + pad, topY)
// CGContextAddLineToPoint(context, width * appNum + tip, topY)
// CGContextAddLineToPoint(context, width * appNum - peak, bottomY)
// CGContextAddLineToPoint(context, endBottomX + pad, bottomY)
// textLeftX = (endBottomX + pad) + ((endTopX + pad) - (endBottomX + pad)) / 2 + 10
// textRightX = (width * appNum - peak) + ((width * appNum + tip) - (width * appNum - peak)) / 2 - 3
// endTopX = width * appNum + tip
// endBottomX = width * appNum - peak
// }
else{
path.moveTo(endTopX + pad, topY);
path.lineTo(width * appNum + tip, topY);
path.lineTo(width * appNum - peak, bottomY);
path.lineTo(endBottomX + pad, bottomY);
path.close();
borderPath.moveTo(endTopX + pad, topY);
borderPath.lineTo(width * appNum + tip, topY);
borderPath.lineTo(width * appNum - peak, bottomY);
borderPath.lineTo(endBottomX + pad, bottomY);
borderPath.close();
textLeftX = (endBottomX + pad) + ((endTopX + pad) - (endBottomX + pad)) / 2 + 10;
textRightX = (width * appNum - peak) + ((width * appNum + tip) - (width * appNum - peak)) / 2 - 3;
endTopX = width * appNum + tip;
endBottomX = width * appNum - peak;
}
// CGContextFillPath(context)
paint.setStyle(Paint.Style.FILL);
if(app.application.colorCode != null){
colorS = "#" + app.application.colorCode;
paint.setColor(Color.parseColor(colorS));
}
else{
paint.setColor(getResources().getColor(R.color.default_application));
}
canvas.drawPath(path, paint);
// borderPaint.setStyle(Paint.Style.STROKE);
// borderPaint.setColor(getResources().getColor(R.color.application_border));
// canvas.drawPath(borderPath, borderPaint);
//
//Add text label
// label = UILabel(frame: CGRectMake(textLeftX, topY, (textRightX-textLeftX), bottomY))
// label.textAlignment = NSTextAlignment.Center
// label.text = app.baseSeries
// label.numberOfLines = 1
// label.adjustsFontSizeToFitWidth = true
// label.font = UIFont(name:"OpenSans-SemiBold", size:30)
//
// self.addSubview(label)
// appBounds.append(label.frame)
//
// appNum++
textViews.add(app.application.baseSeries);
textViewsDimens.add(new float[]{textLeftX, textRightX});
appNum++;
// }
}
// self.layer.borderColor = UIColor.lightGrayColor().CGColor
// self.layer.borderWidth = 1.0
//
if(!addedTextViews){
createTextViews();
}
}
}
private void createTextViews(){
AutoResizeTextView label;
LayoutParams layout;
for(int i = 0; i < textViews.size(); i++){
label = new AutoResizeTextView(getContext());
label.setText(textViews.get(i));
label.setTextAppearance(getContext(), R.style.ApplicationText);
layout = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layout.topMargin = 0;
layout.height = viewHeight;
layout.leftMargin = (int) textViewsDimens.get(i)[0];
layout.width = (int) textViewsDimens.get(i)[1] - (int) textViewsDimens.get(i)[0];
label.setLayoutParams(layout);
this.addView(label);
label.setGravity(Gravity.CENTER);
}
addedTextViews = true;
}