converting textobject to name of other object.

[Lars Tengnagel]

I'm trying to use the matrix variable to collect a matrix in the file
MatrixInfo which contains a lot of different matrices. Yhe commented line is
the problem.
HOW ???????

import re
import MatrixInfo

class Diff:
def __init__(self,f ilobj,matrix='p am250',begin=0, end='none'):
self.fil = filobj
self.begin = begin
self.end = end
if matrix in MatrixInfo.avai lable_matrices:
######self.matr ix =MatrixInfo.mat rix
self.matrix= MatrixInfo.pam2 50
else print "matrix don't exist %s" %matrix
self.seqnr=0
self.basenr=0
self.dict = {}

Thanks Lars

[Peter Otten]

Lars Tengnagel wrote:

I'm trying to use the matrix variable to collect a matrix in the file
MatrixInfo which contains a lot of different matrices. Yhe commented line
is the problem.
HOW ???????
import re
import MatrixInfo

class Diff:
def __init__(self,f ilobj,matrix='p am250',begin=0, end='none'):
self.fil = filobj
self.begin = begin
self.end = end if matrix in MatrixInfo.avai lable_matrices:
######self.matr ix =MatrixInfo.mat rix
self.matrix= MatrixInfo.pam2 50
else print "matrix don't exist %s" %matrix
Assuming available_matri ces_dict is a dictionary with the matrices' name as
keys:

if matrix in MatrixInfo.avai lable_matrices_ dict:
self.matrix = MatrixInfo.avai lable_matrices_ dict[matrix]
else:
print "matrix don't exist %s" %matrix

or a bit more pythonic, since a Diff instance with an unknown matrix
probably doesn't make much sense:

# you have to handle the exception outside of
# Diff.__init__()
self.matrix = MatrixInfo.avai lable_matrices_ dict[matrix]
self.seqnr=0
self.basenr=0
self.dict = {}

Now how will the available_matri ces_dict dictionary come to be?

At the end of MatrixInfo do

available_matri ces_dict = dict([(name, globals()[name]) for name in
available_matri ces])

Or you drop the available_matri ces list (I suppose) altogether and use a
dict literal instead

available_matri ces_dict = {"pam250": pam250, ...}

Peter