source: nappy/trunk/naFile1001.py @ 343

"""
naFile1001.py
=============

Container module for NAFile1001 class.

"""

# Imports from python standard library

# Imports from local package
from textParser import *
import naFile

class NAFile1001(naFile.NAFile):
    """
    Class to read, write and interact with NASA Ames files conforming to the
    File Format Index (FFI) 1001.
    """

    def readHeader(self):
        """
        Reads FFI-specifc header section.
        """
        self._readCommonHeader()
        self.DX=readItemsFromLine(self.file.readline(), self.NIV, float)
        self.XNAME=readItemsFromLines(self._readLines(self.NIV), self.NIV, str)
        self._readVariablesHeaderSection()
        self._readComments()

    def writeHeader(self):
        """
        Writes FFI-specifc header section.
        """        
        self._writeCommonHeader()
        self.file.write(("%s "*self.NIV+"\n") % tuple(self.DX))
        self.file.write("%s\n"*self.NIV % tuple(self.XNAME))
        self._writeVariablesHeaderSection()
        self._writeComments()

    def _setupArrays(self):
        """
        Sets up FFI-specific arrays to fill with data (lists of lists).
        """
        self.X=[]
        self.V=[]
        # Set up the variables list
        for n in range(self.NV):
            self.V.append([])

    def _readData1(self, datalines, ivar_count):
        """
        Reads first line/section of current block of data.
        """
        (x_and_v, rtlines)=readItemsFromUnknownLines(datalines, 1+self.NV, float)
        (x, v)=(x_and_v[0], x_and_v[1:])
        self.X.append(x)
        count=0
        # Set up mth list in self.V
        for n in range(self.NV):
            self.V[n].append(v[count])
            count=count+1
        return rtlines    

    def _readData2(self, datalines, ivar_count):
        """
        Reads second line/section (if used) of current block of data.
        """
        return datalines  

    def writeData(self):
        """
        Writes the data section of the file.
        This method can be called directly by the user.
        """
        for i in range(len(self.X)):
            var_string=""
            for n in range(self.NV):
                var_string=var_string+("%s    " % self.V[n][i])
            self.file.write("%s    %s\n" % (self.X[i], var_string))