function - Local variable referenced before assignment in Python -

truel="" count = 0 finle_touch=false #true after find first 3 upperletter  # check if there 1 lower letter after 3 upper letter def one_lower(i):     count=0     if == i.lower:         finle_touch=true         truel=i  # check 3 upper letter def three_upper(s):     in s:         if count == 3:             if finle_touch==true:                 break             else:                 one_lower(i)         elif == i.upper:             count +=1             print(count) #for debug         else:             count ==0             finle_touch=false  stuff="dsfsffsfsssfsfsffssfsssssssss......." three_upper(stuff) print(truel) 

so got alot of string on 'stuff' , find 1 lowercase letter sorrund 3 uppercase letter.

but when run code get:

traceback (most recent call last):   file "c:\python33\mypy\code.py", line 1294, in <module>     three_upper(stuff)   file "c:\python33\mypy\code.py", line 1280, in three_upper     if count == 3: unboundlocalerror: local variable 'count' referenced before assignment 

i don't understand why. in advance

due line count +=1 python thinks count local variable , not search global scope when used if count == 3:. that's why got error.

use global statement handle that:

def three_upper(s): #check 3 upper letter     global count     in s: 

from docs:

all variable assignments in function store value in local symbol table; whereas variable references first in local symbol table, in global symbol table, , in table of built-in names. thus, global variables cannot directly assigned value within function (unless named in global statement), although may referenced.