Python: for key in gasCount: NameError: name 'gasCount' is not defined -

import string  def getfile():     filename = input('filename: ') #the file name should .csv     file = open(filename, 'r')     firstline = true      line = file.readline()     if line == none or line == '':         return none      if firstline: # not want read field names         line = file.readline() # there more read         firstline = false # skip them. code assuems       return file  #count number of (t's) in field [correct] def calct(correct):     global tcount     found = false     ch in correct:#look @ each character in turn         if ch in 'tt':             found = true      if found:         tcount +=1  #how many times least common string appear in field [gas]  def gas_count(gas):     global gascount     if gas in gascount:         gascount[gas] += 1     else:         gascount[gas] = 1  smallest = 100000 key in gascount:     if gascount[key] < smallest:         smallest = gascount[key]  answers = [] key in gascount:     if gascount[key] == smallest:         answers.append(key)   #find sum of values in field [quant] less (408) def sum_quant(quant):     global qsum     if quant < 408:         qsum += quant code="0"         #how many values in 'code' field not match format 9999(x9+)9? def checkstring(astring):     if len(code)  != 10:         return false     if not astring[0] in string.digits:         return false     if not astring[1] in string.digits:         return false     if not astring[2] in string.digits:         return false     if not astring[3] in string.digits:         return false     if not astring[4]=='(':         return false     if not astring[5] in string.ascii_lowercase:         return false     if not astring[6] in string.digits:         return false     if not astring[7]=='+':         return false     if not astring[8]==')':         return false     if not astring[9] in string.digits:         return false     return true  if checkstring(code):     global ccount     ccount += 1   #what average value of numbers in field [age] in range (30) , (107) inclusive  def average_age(age):     global tage     global agecount     if age >= 30 , age <=107:         tage += age     agecount += 1  #find sum of numbers in field [length] between (2.482) , (6.428) inclusive  def sum_length(leng):     global lensum     if leng >= 2.482 , leng <= 6.428:         lensum += leng  #count lines gas's have value (nitrogen) *or* quant less 318 def calcgas(gas, quant):     global clines     if gas == 'nitrogen' or quant < 318:         clines += 1  def processline(line):     line = line.strip()     fields = line.split(',')      correct = fields[0]     gas = fields[1]     quant = int(fields[2])     code = fields[3]     age = int(fields[4])     leng = float(fields[5])     calct(correct)     sum_length(leng)     calcgas(gas, quant)     average_age(age)     sum_quant(quant)     gas_count(gas)     checkstring(astring)  def processfile(data):      line in data:         processline(line)      data.close()  def displayresults():     #count number of (t's) in field [correct]     print('the number of (t) in field [correct]: %d'%(tcount))     print('-' *10)       print(gascount)     print('-' *10)     print(ccount)     #find sum of values in field [quant] less (408)     print('the sum of values in field [quant] less (408): %d'%(qsum))     print('-' *10)     #how many values in 'code' field not match format 9999(x9+)9?     #print('the values in code field not match format 9999(x9+)9: %d'%()     print('-' *10)     #what average value of numbers in field [age] in range (30) , (107) inclusive     print((tage/agecount))     print('-' *10)     #find sum of numbers in field [length] between (2.482) , (6.428) inclusive      print('the sum of numbers in field [length] between (2.482) , (6.428): %6.3f'%(lensum))     print('-' *10)     #count lines gas's have value (nitrogen) *or* quant less 318     print('the lines gas have value (nitrogen) *or* quant less 318: %d' %(clines))   tcount = 0 gascount = {} qsum = 0 ccount = 0 agecount = 0 tage = 0 lensum = 0 clines = 0 myfile = getfile() processfile(myfile) displayresults() 

getting error:

traceback (most recent call last):   file "c:\users\ultra\downloads\3215402\3215402\3215402 stage 1 function.py", line 63, in <module> 

editing tobias_k:

def gas_count(gas):     global gascount     if gas in gascount:         gascount[gas] += 1     else:         gascount[gas] = 1     smallest = 100000   key in gascount:       if gascount[key] < smallest:              smallest = gascount[key]   answers = []   key in gascount:       if gascount[key] == smallest:               answers.append(key)   

gives error

traceback (most recent call last):   file "c:\users\ultra\downloads\3215402\3215402\3215402 stage 1 function.py", line 57, in <module>     key in gascount: nameerror: name 'gascount' not defined