* string.py: added rindex(), rfind(); changed index() to interpret

negative start indices starting from the right.
* ftplib.py: debug() -> set_debuglevel(); change demo to use __init__().
* os.py: added execl, execlp, and execvp.
* lambda.py: removed (now that we have built-in map, reduce, bagof, lambda)
* test_b{1,2}.py, testall.out: added tests for bagof, lambda, map, reduce
* commands.py: use os, not posix
* test_grammar.py: make it easy to disable non-portable int overflow tests
* dis.py: don't abuse range()

Lib/commands.py

@@ -23,8 +23,8 @@ def getoutput(cmd):
 # Returns a pair (sts, output)
 #
 def getstatusoutput(cmd):
-	import posix
+	import os
-	pipe = posix.popen('{ ' + cmd + '; } 2>&1', 'r')
+	pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
 	text = pipe.read()
 	sts = pipe.close()
 	if sts == None: sts = 0
@@ -35,8 +35,8 @@ def getstatusoutput(cmd):
 # Make command argument from directory and pathname (prefix space, add quotes).
 #
 def mk2arg(head, x):
-	import posixpath
+	import os
-	return mkarg(posixpath.join(head, x))
+	return mkarg(os.path.join(head, x))
 
 
 # Make a shell command argument from a string.

Lib/dis.py

@@ -68,8 +68,8 @@ hasname = []
 hasjrel = []
 hasjabs = []
 
-opname = range(256)
+opname = [''] * 256
-for op in opname: opname[op] = '<' + `op` + '>'
+for op in range(256): opname[op] = '<' + `op` + '>'
 
 def def_op(name, op):
 	opname[op] = name

Lib/ftplib.py

@@ -5,7 +5,7 @@
 # Example:
 #
 # >>> from ftplib import FTP
-# >>> ftp = FTP().init('ftp.cwi.nl') # connect to host, default port
+# >>> ftp = FTP('ftp.cwi.nl') # connect to host, default port
 # >>> ftp.login() # default, i.e.: user anonymous, passwd user@hostname
 # >>> def handle_one_line(line): # callback for ftp.retrlines
 # ...     print line
@@ -109,8 +109,9 @@ class FTP:
 	# 0: no debugging output (default)
 	# 1: print commands and responses but not body text etc.
 	# 2: also print raw lines read and sent before stripping CR/LF
-	def debug(self, level):
+	def set_debuglevel(self, level):
 		self.debugging = level
+	debug = set_debuglevel
 
 	# Internal: send one line to the server, appending CRLF
 	def putline(self, line):
@@ -405,8 +406,8 @@ def test():
 			debugging = debugging+1
 			del sys.argv[1]
 		host = sys.argv[1]
-		ftp = FTP().init(host)
+		ftp = FTP(host)
-		ftp.debug(debugging)
+		ftp.set_debuglevel(debugging)
 		ftp.login()
 		def writeln(line): print line
 		for file in sys.argv[2:]:

Lib/os.py

@@ -38,3 +38,33 @@ except ImportError:
 	import macpath
 	path = macpath
 	del macpath
+
+def execl(file, *args):
+	execv(file, args)
+
+def execle(file, *args):
+	env = args[-1]
+	execve(file, args[:-1], env)
+
+def execlp(file, *args):
+	execvp(file, args)
+
+def execvp(file, args):
+	if '/' in file:
+		execv(file, args)
+		return
+	ENOENT = 2
+	if environ.has_key('PATH'):
+		import string
+		PATH = string.splitfields(environ['PATH'], ':')
+	else:
+		PATH = ['', '/bin', '/usr/bin']
+	exc, arg = (ENOENT, 'No such file or directory')
+	for dir in PATH:
+		fullname = path.join(dir, file)
+		try:
+			execv(fullname, args)
+		except error, (errno, msg):
+			if errno != ENOENT:
+				exc, arg = error, (errno, msg)
+	raise exc, arg

Lib/string.py

@@ -100,6 +100,7 @@ def index(s, sub, *args):
 		if len(args) > 1:
 			raise TypeError, 'string.index(): too many args'
 		i = args[0]
+		if i < 0: i = i + len(s)
 	else:
 		i = 0
 	n = len(sub)
@@ -109,6 +110,25 @@ def index(s, sub, *args):
 		i = i+1
 	raise index_error, (s, sub) + args
 
+# Find last substring, raise exception if not found
+def rindex(s, sub, *args):
+	if args:
+		if len(args) > 1:
+			raise TypeError, 'string.rindex(): too many args'
+		i = args[0]
+		if i < 0: i = i + len(s)
+	else:
+		i = 0
+	n = len(sub)
+	m = len(s) + 1 - n
+	r = None
+	while i < m:
+		if sub == s[i:i+n]: r = i
+		i = i+1
+	if r is None:
+		raise index_error, (s, sub) + args
+	return r
+
 # Find substring, return -1 if not found
 def find(*args):
 	try:
@@ -116,6 +136,13 @@ def find(*args):
 	except index_error:
 		return -1
 
+# Find last substring, return -1 if not found
+def rfind(*args):
+	try:
+		return apply(rindex, args)
+	except index_error:
+		return -1
+
 # Convert string to float
 atof_error = 'non-float argument to string.atof'
 def atof(str):

Lib/stringold.py

@@ -100,6 +100,7 @@ def index(s, sub, *args):
 		if len(args) > 1:
 			raise TypeError, 'string.index(): too many args'
 		i = args[0]
+		if i < 0: i = i + len(s)
 	else:
 		i = 0
 	n = len(sub)
@@ -109,6 +110,25 @@ def index(s, sub, *args):
 		i = i+1
 	raise index_error, (s, sub) + args
 
+# Find last substring, raise exception if not found
+def rindex(s, sub, *args):
+	if args:
+		if len(args) > 1:
+			raise TypeError, 'string.rindex(): too many args'
+		i = args[0]
+		if i < 0: i = i + len(s)
+	else:
+		i = 0
+	n = len(sub)
+	m = len(s) + 1 - n
+	r = None
+	while i < m:
+		if sub == s[i:i+n]: r = i
+		i = i+1
+	if r is None:
+		raise index_error, (s, sub) + args
+	return r
+
 # Find substring, return -1 if not found
 def find(*args):
 	try:
@@ -116,6 +136,13 @@ def find(*args):
 	except index_error:
 		return -1
 
+# Find last substring, return -1 if not found
+def rfind(*args):
+	try:
+		return apply(rindex, args)
+	except index_error:
+		return -1
+
 # Convert string to float
 atof_error = 'non-float argument to string.atof'
 def atof(str):

Lib/test/test_b1.py

@@ -90,6 +90,14 @@ f.close()
 execfile(TESTFN)
 unlink(TESTFN)
 
+print 'filter'
+if filter("c: 'a' <= c <= 'z'", 'Hello World') <> 'elloorld':
+	raise TestFailed, 'filter (filter a string)'
+if filter(None, [1, 'hello', [], [3], '', None, 9, 0]) <> [1, 'hello', [3], 9]:
+	raise TestFailed, 'filter (remove false values)'
+if filter('x: x > 0', [1, -3, 9, 0, 2]) <> [1, 9, 2]:
+	raise TestFailed, 'filter (keep positives)'
+
 print 'float'
 if float(3.14) <> 3.14: raise TestFailed, 'float(3.14)'
 if float(314) <> 314.0: raise TestFailed, 'float(314)'
@@ -112,6 +120,11 @@ if int(314) <> 314: raise TestFailed, 'int(314)'
 if int(3.14) <> 3: raise TestFailed, 'int(3.14)'
 if int(314L) <> 314: raise TestFailed, 'int(314L)'
 
+print 'lambda'
+binary_plus = lambda('x, y: x+y')
+if binary_plus(2, 10) <> 12:
+	raise TestFailed, 'binary_plus(2, 10)'
+
 print 'len'
 if len('123') <> 3: raise TestFailed, 'len(\'123\')'
 if len(()) <> 0: raise TestFailed, 'len(())'
@@ -125,6 +138,32 @@ if long(314) <> 314L: raise TestFailed, 'long(314)'
 if long(3.14) <> 3L: raise TestFailed, 'long(3.14)'
 if long(314L) <> 314L: raise TestFailed, 'long(314L)'
 
+print 'map'
+if map(None, 'hello world') <> ['h','e','l','l','o',' ','w','o','r','l','d']:
+	raise TestFailed, 'map(None, \'hello world\')'
+if map(None, 'abcd', 'efg') <> \
+	  [('a', 'e'), ('b', 'f'), ('c', 'g'), ('d', None)]:
+	raise TestFailed, 'map(None, \'abcd\', \'efg\')'
+if map(None, range(10)) <> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]:
+	raise TestFailed, 'map(None, range(10))'
+if map('x: x*x', range(1,4)) <> [1, 4, 9]:
+	raise TestFailed, 'map(\'x: x*x\', range(1,4))'
+from math import sqrt
+if map('x: map(sqrt,x)', [[16, 4], [81, 9]]) <> [[4.0, 2.0], [9.0, 3.0]]:
+	raise TestFailed, map('x: map(sqrt,x)', [[16, 4], [81, 9]])
+if map('x,y: x+y', [1,3,2], [9,1,4]) <> [10, 4, 6]:
+	raise TestFailed, 'map(\'x,y: x+y\', [1,3,2], [9,1,4])'
+def plus(*v):
+	accu = 0
+	for i in v: accu = accu + i
+	return accu
+if map(plus, [1, 3, 7]) <> [1, 3, 7]:
+	raise TestFailed, 'map(plus, [1, 3, 7])'
+if map(plus, [1, 3, 7], [4, 9, 2]) <> [1+4, 3+9, 7+2]:
+	raise TestFailed, 'map(plus, [1, 3, 7], [4, 9, 2])'
+if map(plus, [1, 3, 7], [4, 9, 2], [1, 1, 0]) <> [1+4+1, 3+9+1, 7+2+0]:
+	raise TestFailed, 'map(plus, [1, 3, 7], [4, 9, 2], [1, 1, 0])'
+
 print 'max'
 if max('123123') <> '3': raise TestFailed, 'max(\'123123\')'
 if max(1, 2, 3) <> 3: raise TestFailed, 'max(1, 2, 3)'

Lib/test/test_b2.py

@@ -111,6 +111,16 @@ finally:
 	sys.stdin = savestdin
 	fp.close()
 
+print 'reduce'
+if reduce('x,y:x+y', ['a', 'b', 'c'], '') <> 'abc':
+	raise TestFailed, 'reduce(): implode a string'
+if reduce('x,y:x+y', [['a', 'c'], [], ['d', 'w']], []) <> ['a','c','d','w']:
+	raise TestFailed, 'reduce(): append'
+if reduce('x,y: x*y', range(2,8), 1) <> 5040:
+	raise TestFailed, 'reduce(): compute 7!'
+if reduce('x,y:x*y', range(2,21), 1L) <> 2432902008176640000L:
+	raise TestFailed, 'reduce(): compute 20!, use long'
+
 print 'reload'
 import string
 reload(string)

Lib/test/test_grammar.py

@@ -24,16 +24,19 @@ print '1.1.2.1 Plain integers'
 if 0xff <> 255: raise TestFailed, 'hex int'
 if 0377 <> 255: raise TestFailed, 'octal int'
 if  2147483647   != 017777777777: raise TestFailed, 'max positive int'
-if -2147483647-1 != 020000000000: raise TestFailed, 'max negative int'
+# Change the following line to "if 0:" if you have 64-bit integers
-# XXX -2147483648
+if 1:
-if 037777777777 != -1: raise TestFailed, 'oct -1'
+	if -2147483647-1 != 020000000000: raise TestFailed, 'max negative int'
-if 0xffffffff != -1: raise TestFailed, 'hex -1'
+	# XXX -2147483648
-for s in '2147483648', '040000000000', '0x100000000':
+	if 037777777777 != -1: raise TestFailed, 'oct -1'
-	try:
+	if 0xffffffff != -1: raise TestFailed, 'hex -1'
-		x = eval(s)
+	for s in '2147483648', '040000000000', '0x100000000':
-	except OverflowError:
+		try:
-		continue
+			x = eval(s)
-	raise TestFailed, 'No OverflowError on huge integer literal ' + `s`
+		except OverflowError:
+			continue
+		raise TestFailed, \
+			  'No OverflowError on huge integer literal ' + `s`
 
 print '1.1.2.2 Long integers'
 x = 0L

Lib/test/testall.out

@@ -73,12 +73,15 @@ dir
 divmod
 eval
 execfile
+filter
 float
 getattr
 hex
 int
+lambda
 len
 long
+map
 max
 min
 test_b2
@@ -90,6 +93,7 @@ range
 input and raw_input
 testing
 testing
+reduce
 reload
 repr
 round