Issue #17177: Stop using imp in a bunch of tests

Lib/test/script_helper.py

@@ -12,7 +12,7 @@
 import shutil
 import zipfile
 
-from imp import source_from_cache
+from importlib.util import source_from_cache
 from test.support import make_legacy_pyc, strip_python_stderr
 
 # Executing the interpreter in a subprocess

Lib/test/support.py

@@ -15,10 +15,10 @@
 import warnings
 import unittest
 import importlib
+import importlib.util
 import collections.abc
 import re
 import subprocess
-import imp
 import time
 import sysconfig
 import fnmatch
@@ -316,7 +316,7 @@ def make_legacy_pyc(source):
         does not need to exist, however the PEP 3147 pyc file must exist.
     :return: The file system path to the legacy pyc file.
     """
-    pyc_file = imp.cache_from_source(source)
+    pyc_file = importlib.util.cache_from_source(source)
     up_one = os.path.dirname(os.path.abspath(source))
     legacy_pyc = os.path.join(up_one, source + ('c' if __debug__ else 'o'))
     os.rename(pyc_file, legacy_pyc)
@@ -335,8 +335,8 @@ def forget(modname):
         # combinations of PEP 3147 and legacy pyc and pyo files.
         unlink(source + 'c')
         unlink(source + 'o')
-        unlink(imp.cache_from_source(source, debug_override=True))
-        unlink(imp.cache_from_source(source, debug_override=False))
+        unlink(importlib.util.cache_from_source(source, debug_override=True))
+        unlink(importlib.util.cache_from_source(source, debug_override=False))
 
 # On some platforms, should not run gui test even if it is allowed
 # in `use_resources'.

Lib/test/test_pdb.py

@@ -1,9 +1,9 @@
 # A test suite for pdb; not very comprehensive at the moment.
 
 import doctest
-import imp
 import pdb
 import sys
+import types
 import unittest
 import subprocess
 import textwrap
@@ -464,7 +464,7 @@ def test_pdb_skip_modules():
 
 
 # Module for testing skipping of module that makes a callback
-mod = imp.new_module('module_to_skip')
+mod = types.ModuleType('module_to_skip')
 exec('def foo_pony(callback): x = 1; callback(); return None', mod.__dict__)
 
 

Lib/test/test_pkgimport.py

@@ -6,7 +6,7 @@
 import tempfile
 import unittest
 
-from imp import cache_from_source
+from importlib.util import cache_from_source
 from test.support import run_unittest, create_empty_file
 
 class TestImport(unittest.TestCase):

Lib/test/test_pkgutil.py

@@ -1,12 +1,12 @@
 from test.support import run_unittest, unload, check_warnings
 import unittest
 import sys
-import imp
 import importlib
 import pkgutil
 import os
 import os.path
 import tempfile
+import types
 import shutil
 import zipfile
 
@@ -105,7 +105,7 @@ class PkgutilPEP302Tests(unittest.TestCase):
     class MyTestLoader(object):
         def load_module(self, fullname):
             # Create an empty module
-            mod = sys.modules.setdefault(fullname, imp.new_module(fullname))
+            mod = sys.modules.setdefault(fullname, types.ModuleType(fullname))
             mod.__file__ = "<%s>" % self.__class__.__name__
             mod.__loader__ = self
             # Make it a package

Lib/test/test_reprlib.py

@@ -3,11 +3,11 @@
   Nick Mathewson
 """
 
-import imp
 import sys
 import os
 import shutil
 import importlib
+import importlib.util
 import unittest
 
 from test.support import run_unittest, create_empty_file, verbose
@@ -241,7 +241,8 @@ def _check_path_limitations(self, module_name):
         source_path_len += 2 * (len(self.longname) + 1)
         # a path separator + `module_name` + ".py"
         source_path_len += len(module_name) + 1 + len(".py")
-        cached_path_len = source_path_len + len(imp.cache_from_source("x.py")) - len("x.py")
+        cached_path_len = (source_path_len +
+            len(importlib.util.cache_from_source("x.py")) - len("x.py"))
         if os.name == 'nt' and cached_path_len >= 258:
             # Under Windows, the max path len is 260 including C's terminating
             # NUL character.

Lib/test/test_zipimport.py

@@ -1,7 +1,7 @@
 import sys
 import os
 import marshal
-import imp
+import importlib.util
 import struct
 import time
 import unittest
@@ -34,7 +34,8 @@ def make_pyc(co, mtime, size):
             mtime = int(mtime)
         else:
             mtime = int(-0x100000000 + int(mtime))
-    pyc = imp.get_magic() + struct.pack("<ii", int(mtime), size & 0xFFFFFFFF) + data
+    pyc = (importlib.util.MAGIC_NUMBER +
+        struct.pack("<ii", int(mtime), size & 0xFFFFFFFF) + data)
     return pyc
 
 def module_path_to_dotted_name(path):
@@ -49,7 +50,7 @@ def module_path_to_dotted_name(path):
 TESTPACK2 = "ziptestpackage2"
 TEMP_ZIP = os.path.abspath("junk95142.zip")
 
-pyc_file = imp.cache_from_source(TESTMOD + '.py')
+pyc_file = importlib.util.cache_from_source(TESTMOD + '.py')
 pyc_ext = ('.pyc' if __debug__ else '.pyo')