Create four band members from the class BandMember. Pickle these objects and store them in a file. Unpickle, then output the objects.

Question

What will be an ideal response?

Answer 1

```
# Pickles and stores four BandMember objects.

import sys, cPickle, BandMember

try:
file = open( "band.dat", "w" ) # open file for writing
except IOError:
print >> sys.stderr, "File could not be opened."
sys.exit( 1 )

# create list of BandMember objects
musicians = [ BandMember.BandMember( "Bob", "guitar" ),
BandMember.BandMember( "Mary", "bass guitar" ),
BandMember.BandMember( "Casey", "guitar" ),
BandMember.BandMember( "Mike", "drums" ) ]

# pickle and store list of BandMember objects
cPickle.dump( musicians, file )

file.close()
```
```
# Unpickles and prints four band members.

import sys, cPickle, BandMember

try:
file = open( "band.dat", "r" ) # opens file for reading
except IOError:
print >> sys.stderr, "File could not be opened."
sys.exit( 1 )

# retrieve objects from file
members = cPickle.load( file )
file.close()

for member in members:
print member
```
Bob plays the guitar
Mary plays the bass guitar
Casey plays the guitar
Mike plays the drums