小编use*_*425的帖子

我无法在Windows 7计算机上通过Anaconda安装conda的代理.我如何使用代理？

http://conda.pydata.org/docs/config.html

我使用下面显示的代码下载文件.然后我试图将NSMutableData变量保存到文件,但是,不创建该文件.我究竟做错了什么？我需要将NSMutableData转换为NSString吗？

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)_response {
    response = [_response retain];
    if([response expectedContentLength] < 1) {
        data = [[NSMutableData alloc] init];
    }
    else {
        data = [[NSMutableData dataWithCapacity:[response expectedContentLength]] retain];
    }
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)_data {
    [data appendData:_data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"file" ofType:@"txt"];

    NSLog(@"saved: %@", filePath);
    [data writeToFile:filePath atomically:YES];
    NSLog(@"downloaded file: %@", data); //all i see in log is some encoded data here
}

我正在将 OSMdroid 与离线 MBTiles 一起使用。我需要能够添加用户从ListView. ListView窗户很容易。但是，我需要帮助根据从ListView. 我的 MBTiles 从 SDCard 加载。

import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapController;
import org.osmdroid.views.MapView;

import android.app.Activity;
import android.os.Bundle;
import android.widget.RelativeLayout;

public class OfflineMapDemoActivity extends Activity {

    private String MapName;

    public String getMapName(){
        return MapName;
    }
    public void setMapName(String s){
        MapName = s;
    }

    // layout
    private RelativeLayout mapLayout;

    // MapView
    private MapView mapView;
    private MapController mapController;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        // init Layout
        setContentView(R.layout.main);
        this.mapLayout = (RelativeLayout) findViewById(R.id.mapLayout);

        // …

我有一个以下正则表达式:

 ^((\d{4}TS\d{0,4}[A-Z0-9]))$

我需要将此转换为SQL语句,如

  SELECT DISTINCT field1 FROM WHERE LIKE Mask ORDER BY field2

我正在使用OpenCV HoughlinesP来查找水平和垂直线.它大部分时间都没有找到任何行.即使它找到一条线,它甚至不接近实际图像.

import cv2
import numpy as np

img = cv2.imread('image_with_edges.jpg')
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)


flag,b = cv2.threshold(gray,0,255,cv2.THRESH_OTSU)

element = cv2.getStructuringElement(cv2.MORPH_CROSS,(1,1))
cv2.erode(b,element)

edges = cv2.Canny(b,10,100,apertureSize = 3)

lines = cv2.HoughLinesP(edges,1,np.pi/2,275, minLineLength = 100, maxLineGap = 200)[0].tolist()

for x1,y1,x2,y2 in lines:
   for index, (x3,y3,x4,y4) in enumerate(lines):

    if y1==y2 and y3==y4: # Horizontal Lines
        diff = abs(y1-y3)
    elif x1==x2 and x3==x4: # Vertical Lines
        diff = abs(x1-x3)
    else:
        diff = 0

    if diff < 10 and diff is not 0:
        del lines[index]

    gridsize …