IndentationError unexpected unindent WHY

Question

IndentationError  unexpected unindent WHY        usr bin python import sys class Seq      def   init   self  id  adnseq  colen           self id       id         self dna      adnseq         self cdnlen   colen         self prot            def   str   self           return   gt  s n s n     self id  self prot      def translate self  transtable           self prot              for i in range 0 len self dna  self cdnlen               codon   self dna i i self cdnlen              aa      transtable codon              self prot    aa     def parseCommandOptions cmdargs           tfname   cmdargs 1          sfname   cmdargs 2          return  tfname  sfname      def readTTable fname           try              ttable                  cdnlen   -1             tfile   open fname   r               for line in tfile                  linearr   line split                   codon     linearr 0                  cdnlen    len codon                  aa        linearr 1                  ttable codon    aa             tfile close               return  ttable  cdnlen      def translateSData sfname  cdnlen  ttable           try               sequences                  seqf   open seq fname   r               line   seqf readline               while line                  if line 0       gt                        id   line 1 len line   strip                       seq                          line   seqf readline                       while line and line 0       gt                            seq    line strip                           line   seqf readline                         sequence   Seq id  seq  cdnlen                      sequence translate ttable                      sequences append sequence              seqf close               return sequences         if   name         main              trans table fname  seq fname    parseCommandOptions sys argv           transtable  colen    readTTable trans table fname          seqs   translateSData seq fname  colen  transtable          for s in seqs              print s   It says    def translateSeqData sfname  cdnlen  ttable        IndentationError  unexpected unindent   WHY  I have checked a thousands times and I can t find the problem  I have only used Tabs and no spaces  Plus  sometimes it asks to define the class  Is that Ok

User · Accepted Answer

It s because you have   def readTTable fname       try    without a matching except block after the try  block  Every try must have at least one matching except   See the Errors and Exceptions section of the Python tutorial

User · Answer

you didn t complete your try statement   You need and except in there too

User · Answer

This error could actually be in the code preceding where the error is reported  See the For example  if you have a syntax error as below  you ll get the indentation error  The syntax error is actually next to the  except  because it should contain a     right after it    try       do something except     print  error exception    def printError e       print e   If you change  except  above to  except    the error will go away    Good luck

User · Answer

MaxPython The answer above is missing  quot   quot  try      do something except      print  error exception   def printError e   print e

[python] IndentationError: unexpected unindent WHY?

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