python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Tools/scripts/pathfix.py

@@ -0,0 +1,177 @@
+#!/usr/bin/env python3
+
+# Change the #! line occurring in Python scripts.  The new interpreter
+# pathname must be given with a -i option.
+#
+# Command line arguments are files or directories to be processed.
+# Directories are searched recursively for files whose name looks
+# like a python module.
+# Symbolic links are always ignored (except as explicit directory
+# arguments).
+# The original file is kept as a back-up (with a "~" attached to its name),
+# -n flag can be used to disable this.
+#
+# Undoubtedly you can do this using find and sed or perl, but this is
+# a nice example of Python code that recurses down a directory tree
+# and uses regular expressions.  Also note several subtleties like
+# preserving the file's mode and avoiding to even write a temp file
+# when no changes are needed for a file.
+#
+# NB: by changing only the function fixfile() you can turn this
+# into a program for a different change to Python programs...
+
+import sys
+import re
+import os
+from stat import *
+import getopt
+
+err = sys.stderr.write
+dbg = err
+rep = sys.stdout.write
+
+new_interpreter = None
+preserve_timestamps = False
+create_backup = True
+
+
+def main():
+    global new_interpreter
+    global preserve_timestamps
+    global create_backup
+    usage = ('usage: %s -i /interpreter -p -n file-or-directory ...\n' %
+             sys.argv[0])
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], 'i:pn')
+    except getopt.error as msg:
+        err(str(msg) + '\n')
+        err(usage)
+        sys.exit(2)
+    for o, a in opts:
+        if o == '-i':
+            new_interpreter = a.encode()
+        if o == '-p':
+            preserve_timestamps = True
+        if o == '-n':
+            create_backup = False
+    if not new_interpreter or not new_interpreter.startswith(b'/') or \
+           not args:
+        err('-i option or file-or-directory missing\n')
+        err(usage)
+        sys.exit(2)
+    bad = 0
+    for arg in args:
+        if os.path.isdir(arg):
+            if recursedown(arg): bad = 1
+        elif os.path.islink(arg):
+            err(arg + ': will not process symbolic links\n')
+            bad = 1
+        else:
+            if fix(arg): bad = 1
+    sys.exit(bad)
+
+ispythonprog = re.compile(r'^[a-zA-Z0-9_]+\.py$')
+def ispython(name):
+    return bool(ispythonprog.match(name))
+
+def recursedown(dirname):
+    dbg('recursedown(%r)\n' % (dirname,))
+    bad = 0
+    try:
+        names = os.listdir(dirname)
+    except OSError as msg:
+        err('%s: cannot list directory: %r\n' % (dirname, msg))
+        return 1
+    names.sort()
+    subdirs = []
+    for name in names:
+        if name in (os.curdir, os.pardir): continue
+        fullname = os.path.join(dirname, name)
+        if os.path.islink(fullname): pass
+        elif os.path.isdir(fullname):
+            subdirs.append(fullname)
+        elif ispython(name):
+            if fix(fullname): bad = 1
+    for fullname in subdirs:
+        if recursedown(fullname): bad = 1
+    return bad
+
+def fix(filename):
+##  dbg('fix(%r)\n' % (filename,))
+    try:
+        f = open(filename, 'rb')
+    except IOError as msg:
+        err('%s: cannot open: %r\n' % (filename, msg))
+        return 1
+    line = f.readline()
+    fixed = fixline(line)
+    if line == fixed:
+        rep(filename+': no change\n')
+        f.close()
+        return
+    head, tail = os.path.split(filename)
+    tempname = os.path.join(head, '@' + tail)
+    try:
+        g = open(tempname, 'wb')
+    except IOError as msg:
+        f.close()
+        err('%s: cannot create: %r\n' % (tempname, msg))
+        return 1
+    rep(filename + ': updating\n')
+    g.write(fixed)
+    BUFSIZE = 8*1024
+    while 1:
+        buf = f.read(BUFSIZE)
+        if not buf: break
+        g.write(buf)
+    g.close()
+    f.close()
+
+    # Finishing touch -- move files
+
+    mtime = None
+    atime = None
+    # First copy the file's mode to the temp file
+    try:
+        statbuf = os.stat(filename)
+        mtime = statbuf.st_mtime
+        atime = statbuf.st_atime
+        os.chmod(tempname, statbuf[ST_MODE] & 0o7777)
+    except OSError as msg:
+        err('%s: warning: chmod failed (%r)\n' % (tempname, msg))
+    # Then make a backup of the original file as filename~
+    if create_backup:
+        try:
+            os.rename(filename, filename + '~')
+        except OSError as msg:
+            err('%s: warning: backup failed (%r)\n' % (filename, msg))
+    else:
+        try:
+            os.remove(filename)
+        except OSError as msg:
+            err('%s: warning: removing failed (%r)\n' % (filename, msg))
+    # Now move the temp file to the original file
+    try:
+        os.rename(tempname, filename)
+    except OSError as msg:
+        err('%s: rename failed (%r)\n' % (filename, msg))
+        return 1
+    if preserve_timestamps:
+        if atime and mtime:
+            try:
+                os.utime(filename, (atime, mtime))
+            except OSError as msg:
+                err('%s: reset of timestamp failed (%r)\n' % (filename, msg))
+                return 1
+    # Return success
+    return 0
+
+def fixline(line):
+    if not line.startswith(b'#!'):
+        return line
+    if b"python" not in line:
+        return line
+    return b'#! ' + new_interpreter + b'\n'
+
+if __name__ == '__main__':
+    main()