将列表转换为格式化字符串 - 更新

时间：2018-01-01 23:10:47

标签： python model django-rest-framework

我一直在尝试编写一个python代码，它会自动从我的选择属性（drf）中给我一个列表

看起来像这样：

2011/2012
2012/2013
2013/2014
2014/2015
2015/2016
...

但我残忍地失败了。 下面是我的代码（没有做任何合理的事情）

x = xrange(2011, 2015)
y = xrange(2012, 2016)
z = '%5d / %5d' % (x, y) 
print '\n'.join(z)

感谢帮助人员。 还有一件事 所以我试着在我的drf模型中输入我的选择属性，除了当我把

时，它没有给我任何错误消息 
Print z

它包括我运行时服务器控制台中的输出

Python manage.py runserver

这是我下面的代码，我想确定我做的是正确的

class studentship(models.Model):
      def datechoice():
             x = xrange(2011,2016)
             y = xrange(2012,2017)
             for tup in zip(x,y):
                    z = '%d/%d' %(tup[0], tup[1])

      pick_date = (datechoice())
      enroll = models.Charfield(max_Length = 1, choices = 
      pick_date, default = 'select school session')

谢谢你的帮助，我保证会急忙改进我的python。

3 个答案:

答案 0 :(得分：1)

您不能使用字符串格式来获取字符串列表。你必须明确地写一个for循环：

class SubsController extends Controller
{

    public function store(Request $request)
    {
        $newsubscriber = new Subscriber;
        $newsubscriber->email = $request->input('email');
        $newsubscriber->save();
    }

}

答案 1 :(得分：0)

虽然，你的问题有点不清楚，试试这个：

for x in range(2011, 2016):
    print("{}/{}".format(x, x+1))

输出：

2011/2012
2012/2013
2013/2014
2014/2015
2015/2016

答案 2 :(得分：0)

将每个范围增加一年

com.androchunk.splash_screen E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.androchunk.splash_screen, PID: 3656
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androchunk.splash_screen/com.androchunk.splash_screen.Splash_Activity}: android.view.InflateException: Binary XML file line #0: Error inflating class ImageView
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2455)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2519)
    at android.app.ActivityThread.access$800(ActivityThread.java:162)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:189)
    at android.app.ActivityThread.main(ActivityThread.java:5532)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
     Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class ImageView
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
    at com.androchunk.splash_screen.Splash_Activity.onCreate(Splash_Activity.java:13)
    at android.app.Activity.performCreate(Activity.java:5966)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2408)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2519) 
    at android.app.ActivityThread.access$800(ActivityThread.java:162) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412) 
    at android.os.Handler.dispatchMessage(Handler.java:106) 
    at android.os.Looper.loop(Looper.java:189) 
    at android.app.ActivityThread.main(ActivityThread.java:5532) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:372) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)  
      Caused by: android.content.res.Resources$NotFoundException: Resource "com.androchunk.splash_screen:drawable/androchunk" (7f060054)  is not a Drawable (color or path): TypedValue{t=0x1/d=0x7f060054 a=-1 r=0x7f060054}
    at android.content.res.Resources.loadDrawableForCookie(Resources.java:2596)
    at android.content.res.Resources.loadDrawable(Resources.java:2536)
    at android.content.res.TypedArray.getDrawable(TypedArray.java:749)
    at android.widget.ImageView.<init>(ImageView.java:146)
    at android.widget.ImageView.<init>(ImageView.java:135)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:72)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:68)
    at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
    at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1024)
    at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1081)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
    at com.androchunk.splash_screen.Splash_Activity.onCreate(Splash_Activity.java:13) 
    at android.app.Activity.performCreate(Activity.java:5966) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2408) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2519) 
    at android.app.ActivityThread.access$800(ActivityThread.java:162) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412) 
    at android.os.Handler.dispatchMessage(Handler.java:106) 
    at android.os.Looper.loop(Looper.java:189) 
    at android.app.ActivityThread.main(ActivityThread.java:5532) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:372) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950) 
    at com.android.internal
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