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path.cat --> join

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Added splitext
This commit is contained in:
Guido van Rossum 1991-08-16 13:27:58 +00:00
parent fbe0a8e090
commit 4d0fdc34d1
1 changed files with 27 additions and 5 deletions
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32
Lib/posixpath.py
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@ -4,19 +4,24 @@
import stat
# Intelligent pathname concatenation.
# Inserts a '/' unless the first part is empty or already ends in '/'.
# Ignores the first part altogether if the second part is absolute
# Join two pathnames.
# Insert a '/' unless the first part is empty or already ends in '/'.
# Ignore the first part altogether if the second part is absolute
# (begins with '/').
#
def cat(a, b):
def join(a, b):
if b[:1] = '/': return b
if a = '' or a[-1:] = '/': return a + b
# Note: join('x', '') returns 'x/'; is this what we want?
return a + '/' + b
cat = join # For compatibility
# Split a path in head (empty or ending in '/') and tail (no '/').
# The tail will be empty if the path ends in '/'.
# It is always true that head+tail = p.
#
def split(p):
head, tail = '', ''
@ -27,6 +32,23 @@ def split(p):
return head, tail
# Split a path in root and extension.
# The extension is everything starting at the first dot in the last
# pathname component; the root is everything before that.
# It is always true that root+ext = p.
#
def splitext(p):
root, ext = '', ''
for c in p:
if c = '/':
root, ext = root + ext + c, ''
elif c = '.' or ext:
ext = ext + c
else:
root = root + c
return root, ext
# Return the tail (basename) part of a path.
#
def basename(p):
@ -120,6 +142,6 @@ def walk(top, func, arg):
exceptions = ('.', '..')
for name in names:
if name not in exceptions:
name = cat(top, name)
name = join(top, name)
if isdir(name):
walk(name, func, arg)