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bpo-45873: Restore Python 3.6 compatibility (GH-29730) #29730

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Merged
merged 4 commits into from
Nov 23, 2021
Merged

bpo-45873: Restore Python 3.6 compatibility (GH-29730) #29730

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f5818e6
bpo-45873: Restore Python 3.6 compatibility
tiran Nov 23, 2021
055b662
Make Python for regen check more verbose
tiran Nov 23, 2021
cb24cf5
Always use the slow path for isprintable
tiran Nov 23, 2021
35bd38f
Use trivial ASCII printable character test
tiran Nov 23, 2021
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21 changes: 20 additions & 1 deletion Tools/scripts/deepfreeze.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,18 +5,37 @@
import contextlib
import os
import re
import sys
import time
import types
import unicodedata
from typing import Dict, FrozenSet, Tuple, TextIO

import umarshal

verbose = False

# See Objects/unicodectype.c:_PyUnicode_IsPrintable
NON_PRINTABLE = {"Cc", "Cf", "Cs", "Co", "Cn", "Zl", "Zp", "Zs"}


def isprintable(b: bytes) -> bool:
if sys.version_info > (3, 7):
return b.isascii() and b.decode("ascii").isprintable()
else:
try:
s = b.decode("ascii")
except UnicodeDecodeError:
return False
for c in s:
if unicodedata.category(c) in NON_PRINTABLE:
return False
return True


def make_string_literal(b: bytes) -> str:
res = ['"']
if b.isascii() and b.decode("ascii").isprintable():
if isprintable(b):
res.append(b.decode("ascii").replace("\\", "\\\\").replace("\"", "\\\""))
else:
for i in b:
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