tools: make nodedownload.py Python 3 compatible

PR-URL: #29104
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: cclauss

tools/configure.d/nodedownload.py

@@ -2,27 +2,29 @@
 # Moved some utilities here from ../../configure
 
 from __future__ import print_function
-import urllib
 import hashlib
 import sys
 import zipfile
 import tarfile
-import fpformat
 import contextlib
+try:
+    from urllib.request import FancyURLopener, URLopener
+except ImportError:
+    from urllib import FancyURLopener, URLopener
 
 def formatSize(amt):
     """Format a size as a string in MB"""
-    return fpformat.fix(amt / 1024000., 1)
+    return "%.1f" % (amt / 1024000.)
 
 def spin(c):
     """print out an ASCII 'spinner' based on the value of counter 'c'"""
     spin = ".:|'"
     return (spin[c % len(spin)])
 
-class ConfigOpener(urllib.FancyURLopener):
+class ConfigOpener(FancyURLopener):
     """fancy opener used by retrievefile. Set a UA"""
     # append to existing version (UA)
-    version = '%s node.js/configure' % urllib.URLopener.version
+    version = '%s node.js/configure' % URLopener.version
 
 def reporthook(count, size, total):
     """internal hook used by retrievefile"""