circuitpython/tests/extmod/re_sub_unmatched.py

17 lines
353 B
Python

# test re.sub with unmatched groups, behaviour changed in CPython 3.5
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"))