python - Strange loops and append functions within them -

-

I was reading, so I found a strange loop which resets a list as "blank" and then adds a value to this list here what i mean: 

  def drawFood (Self, food matrix): food images = [] color = enumate FOOD_COLOR for xnum, x (food matrix): Poor self Koapret and (xNum * 2) & Lt; = FoodMatrix.width: color = TEAM_COLORS [0] if self.capture and (xNum * 2) & gt; Foodmates.width: color = TEAM_COLORS [1] imageRow = [] foodImages.append (imageRow) for ynum, cell (x) in enumerate: if cell: # here is the food screen = self.to_screen ((xNum, yNum) ) Dot = circle (screen, FOOD_SIZE * self.gridSize, outlineColor = color, fillcolor = color, width = 1) imageRow.append (dot) Other: imageRow.append (none) Primary However,  foodImages = []  and  imageRow = []  are both food items. Reset to empty in each iteration of the loop, the list of food images is increasing. 
 
 Is it possible because we have  imageRow  and  imageRow  list  images of food  to  food images  The list continues to grow, though  imageRow  was set to empty?

The code can be a little confusing. 

  imageRow = [] FoodImages.append (imageRow) ... imageRow.append ("Something")

foodImages Only a blank list is set to the set even if you add an empty imageRow to foodImages , you still have the same imageRow object But are working later on. So when you add something to the code below and below in the imageRow it will be visible to the foodImages list (which contains imageRow object).


Comments

Post a Comment

Popular posts from this blog

Editing Python Class in Shell and SQLAlchemy -

-
I am working on the terminal on a shell script after this tutorial SQLAlchemy tutorial. I need to type gt; & Gt; & Gt; Sqlalchemy import column, integer, string & gt; & Gt; & Gt; Class user (base): __tablename__ = 'users' id = column (integer, primary_key = true) name = column (string) absolute name = column (string) password = column (string) def __repr __ (self): return "& lt ; User (name = '% s', absolute name = '% s', password = '% s') & gt; "% (Self.name, self.fullname, self.password) After the problem I have typed the password = column (string) I hit twice and changed .... >> I then took everything back but then an error was thrown because the class already exists ... I am not completely sure how to fix it. How do I open that slip in the shell script and edit it (Add DF to DRR) The error thrown below: / user / giripeters / TFSQLLX / Lib / python2.7 / site-packages / sqlalchemy / ext / decla...
Read more

import - Python ImportError: No module named wmi -

-
I followed the instructions for downloading WMI for Python When I try to run the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = wmi.WMI (): if Raw_input ("restart% s?"% S.Caption) .upper () == "Y": s.StartService () I got the error traceback (most recent call end): file ". \", Line 1, edit: I am using Python 2.7.6 EDIT2: I am running 64-bit Windows 2008 R2, and I've downloaded WMI-1.4.9.zip (md5). I removed the content and put it in D: Python \ Tools \ Scripts I executed dragon setup.py.install I said D : \ Python \ tools \ scripts to% PATH% and when I execute the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = Wmi.WMI (): If raw_input ("Restart% s?"% S. Caption). () == "Y": s.StartService () error me Gets traceback (most recent call final): File ". See \", line 1, & lt; Modu...
Read more

uislider - In a MATLAB GUI, how does one implement a continuously varying slider from a GUIDE created .m file? -

-
I am trying to create a GUI with a plot and a slider. The slider should be described as continuously and output. I have a problem with this explanation that the uicontrol object is programmatically created, on the contrary, I want to know that in the last three instances, to complete the same thing done according to the program What can be added to a GUI file that is created. The code is down, and I have marked the (wrong) code that is provided by some of the above examples. Thanks a lot for any help! This slider function sets P1_slider_Callback (hObject, eventdata, handle) (handle, dragon, 'string', num2str (get (hObject, 'value'), 3)) PlottheData_Callback ( HOBject, EventData, Handle)% "PlotHeadata" is a button that creates the data slider based on the value of P1_slider%, and I think that here "p1_slider_CreateFcn" (hObject, eventdata, handle) needs to be assembled (HOBJECT, 'BackgroundRoller'), (0, 'Default UITTACKBACK MANDROLLE...
Read more