circuitpython/tests/extmod/ure_sub_unmatched.py

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'))