Errata for "Perl to Python Migration" by Martin C. Brown

Although Perl to Python Migration, by Martin C. Brown, Addison Wesley (2002) is out of print, I think this is a very good and practical book to learn Python, especially for those who are thinking of moving from Perl to Python. Here are the errata that I noticed while going through the book.

p.41

	print 'This is a' + 'concatenated', string
==>
	print 'This is a' + ' concatenated', 'string'

Note a blank before "concatenated", and the quotes around "string".

p.72, "Type conversion", 2nd paragraph, 2nd line
" (back ticks)
==>
` (back ticks) .
p.79, 1st paragraph, 3rd line
when the loop exists
==>
when the loop exits

p.178, examples:

	os.execv('/bin/ls', ('-la'))   (2 places)
	os.execve('/usr/local/bin/cvs', ('commit'), {'CVSROOT':'/export/cvs'})
	os.execvp('/bin/ls', ('-la'))
	os.execvpe('/cvs', ('commit'), {'CVSROOT':'/export/cvs'})	
==>
	os.execv('/bin/ls', ('-la',))
	os.execve('/usr/local/bin/cvs', ('commit',), {'CVSROOT':'/export/cvs'})
	os.ececvp('/bin/ls', (-la',))
	os.execvpe('/cvs', ('commit',), {'CVSROOT':'/export/cvs'})

The second argument must be a tuple, and single element tuple needs a comma at the end (p.57).

p.180, 2nd example

	while(1):
	    ....
	    else:
	    break
==>
	while(1):
	    ....
	    else:
	        break

p.196

	string.translate(text,
	maketrans('abcdefg....
==>
	string.translate(text,
	string.maketrans('abcdefg....

p.203, 3rd line

	date = re.sub(r'(\d{4})(\d{2})(\d{2})', '\3.\2.\1', date)
==>
	date = re.sub(r'(\d{4})(\d{2})(\d{2})', r'\3.\2.\1', date)

p.216, "Getting all the lines"

	lines = myfile.lines()
==>
	lines - myfile.readlines()

p.240, end of "Working with HTTP"
httmllib module
==>
htmllib module

Updated 2006-02-05, Taku Yamanaka [taku[AT]hep.sci.osaka-u.ac.jp