comefrom: <qiyuangong>014_Longest_Common_Prefix_1.py
code: def longestCommonPrefix( strs):
      ls = len(strs)
      if ls == 1:
          return strs[0]
      prefix = ''
      pos = 0
      while True:
          try:
              current = strs[0][pos]
          except IndexError:
              break
          index = 1
          while index < ls:
              try:
                  if strs[index][pos] != current:
                      break
              except IndexError:
                  break
              index += 1
          if index == ls:
              prefix = prefix + current
          else:
              break
          pos += 1
      return prefix
masked: def sample_funcname ( var_0 ) :
      var_2 = len ( var_0 )
      if var_2 == 1 :
          return var_0 [ 0 ]
      var_6 = ''
      var_7 = 0
      while True :
          try :
              var_9 = var_0 [ 0 ] [ var_7 ]
          except IndexError :
              break
          var_11 = 1
          while var_11 < var_2 :
              try :
                  if var_0 [ var_11 ] [ var_7 ] != var_9 :
                      break
              except IndexError :
                  break
              var_11 += 1
          if var_11 == var_2 :
              var_6 = var_6 + var_9
          else :
              break
          var_7 += 1
      return var_6
  