referenced before assignment error in python

Question

In Python I m getting the following error   UnboundLocalError  local variable  total  referenced before assignment   At the start of the file  before the function where the error comes from   I declare  total  using the global keyword  Then  in the body of the program  before the function that uses  total  is called  I assign it to 0  I ve tried setting it to 0 in various places  including the top of the file  just after it is declared   but I can t get it to work  Does anyone see what I m doing wrong

User · Answer

def inside       global var    var    info  inside   print var    gt  gt  gt  info   problem ended

User · Answer

My Scenario  def example        cl    0  1      def inner             cl    1  2    access this way will throw  reference before assignment          cl 0    1          cl 1    2     these won t      inner

User · Answer

I found this post through the fact that I had this error myself in my own code and I know that it has been a while since this was posted and you already got some answers and fixed issue for that situation but just wanted to explain how I fixed it just in case it could help someone else   Basically what I thought at first was that the code editor as was using REPL it as was making something for a friend and knew that she wouldn t want to have to download like a code editor anyways the point is I thought that it couldn t handle the code because the complexity was at 139 at that point got even higher afterwards  but then I began experimenting and realized that within my set of functions just outside of a true loop within my a loop function for that letter to register it needed to define it  So basically I wasn t defining the Value in this case a counting feature actually within the code  I would share my code here but it s kind of personal as in the print statements and also it s 2349 lines long and yeah anyway hope this helps  Also recommend using if you can in my case for some of the code I could  putting it into way more scripts if you can to make it easier on your brain  Once again hope this helps  if you have any questions  please feel free to ask and I will answer to the best of my ability  I hope this helps    -Sam

User · Answer

I think you are using  global  incorrectly  See Python reference  You should declare variable without global and then inside the function when you want to access global variable you declare it global yourvar      usr bin python  total  def checkTotal        global total     total   0   See this example      usr bin env python  total   0  def doA          not accessing global total     total   10  def doB        global total     total   total   1  def checkTotal          global total - not required as global is required       only for assignment - thanks for comment Greg     print total  def main        doA       doB       checkTotal    if   name         main         main     Because doA   does not modify the global total the output is 1 not 11

[python] referenced before assignment error in python

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