circuitpython/tests/extmod/ure_sub_unmatched.py
David Lechner 3dc324d3f1 tests: Format all Python code with black, except tests in basics subdir.
This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.
2020-03-30 13:21:58 +11:00

20 lines
419 B
Python

# test re.sub with unmatched groups, behaviour changed in CPython 3.5
try:
import ure as re
except ImportError:
try:
import re
except ImportError:
print("SKIP")
raise SystemExit
try:
re.sub
except AttributeError:
print("SKIP")
raise SystemExit
# first group matches, second optional group doesn't so is replaced with a blank
print(re.sub(r"(a)(b)?", r"\2-\1", "1a2"))