Source code for IMMA.write

# Read in IMMA records from files.

import re     #  Regular Expressions
from structure import attachment
from structure import parameters
from structure import definitions

# Write out a record to a file
[docs]def write(record,fh): # fh is a filehandle """Write the given record to a file. File should be result of :func:`open` (or anything with a ``write`` method). Args: record (:obj:`dict`): One IMMA record. fh (:obj:`file`): File to write to (from :func:`open` function). """ Result = "" for attachment_n in record['attachments']: Result += _encode(record,attachment_n)
fh.write( Result+"\n" ) # Make a string representation of an attachment def _encode (attachment, attachment_n): # Attachment number params=parameters["%02d" % attachment_n] defns=definitions["%02d" % attachment_n] Result = "" for param in params: if ( attachment[param] != None): Tmp = attachment[param] # Scale to integer units for output if ( defns[param][5] != None ): Tmp = float(Tmp)/defns[param][5]; Tmp = int(round(Tmp)) # nint # Encode as base36 if required if ( defns[param][6] == 2 ): Tmp = _encode_base36(Tmp); # Print as an string of the correct length if ( defns[param][6] == 1 ): # Integer if ( defns[param][0] != None ): Lstring = "%%%dd" % (defns[param][0]) Tmp = Lstring % (Tmp) else: # Undefined length - don't try to constrain it Tmp = "%d" % (Tmp) else: # String if ( defns[param][0] != None ): Lstring = "%%-%ds" % (defns[param][0]) Tmp = Lstring % (Tmp) else: Tmp = "%-s" % (Tmp) Result += Tmp else: # Undefined data - make a blank string of the corect length if ( defns[param][0] != None ): Lstring = "%%%ds" % (defns[param][0]) Result += Lstring % (" ") else: # Undefined data with unknown length - should never happen Result += " "; # Done all the parameters, add the ID and length to the start # (except for core) if ( attachment_n != 0 ): if ( attachment_n == 99 ): Result = "%2d 0%s" % (attachment_n, Result) elif attachment_n == 8: Result = "%2d2U%s" % (attachment_n, Result) else: Result = "%2d%2d%s" % (attachment_n, len(Result) + 4, Result) return Result # Convert a base 10 value in the range 0-35 to base36 def _encode_base36(t): return '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'[t:t+1]