python - For Loop with Bool -

i have simple loop gets stuck on division 0 error. running bool filter out zero-value denominators, reason bool used isn't working. can please help? using python 2.6.5

here sample code:

for in range(0,len(lines)):     line = lines[i]     line = line.split(";")     leansz = line[9]     fw = line[34]     fs = line[35]       print "fs: %s  %s"%(fs,type(fs))  #troubleshooting denominator , type     if fs == "0":  #i have tried fs == 0 , fs == "0" no avail         print 'fs == "0"' #checking if bool working         continue  #return top of loop if denominator 0     lnszra = float(leansz)/(float(fs)/2)  #division 0 error    

here sample of returned , error:

fs: 184   <type 'str'> fs: 1241   <type 'str'> fs: 2763   <type 'str'> fs: 1073   <type 'str'> fs: 971   <type 'str'> fs: 0   <type 'str'> traceback (most recent call last):   file "mpreader.py", line 50, in <module>     lnszra = float(leansz)/(float(fs)/2) zerodivisionerror: float division 

your fs value string includes newline character file still, test string value:

if fs == '0\n': 

or strip newline:

    if fs.strip() == '0':

or turn fs float first:

if float(fs) == 0: 

or strip line while splitting:

line = line.strip().split(';') 

further tips:

• just loop on lines directly; don't use range():

  for line in lines:     line = line.strip()     # `line` 

  even if still need index as well, use enumerate() generate index:

  for i, line in enumerate(lines):     line = line.strip()     # `line` , `i`. 

• you can use csv module handle splitting data files rows:

  import csv  open(somefile, 'rb') inputfile:     reader = csv.reader(inputfile, delimiter=';')     row in reader:         leansz, fw, fs = map(float, (row[9], row[34], row[35]))         if not fs: continue         lnszra = leansz / (fs / 2)