import re
files = ["gfrt_32_20.csv", "wertf_18.csv", "12_01.csv", "ith_Raw.csv"]
result = [f for f in files if re.search(r'_\d{2}\.csv$', f)]
print(result)
aW1wb3J0IHJlCmZpbGVzID0gWyJnZnJ0XzMyXzIwLmNzdiIsICJ3ZXJ0Zl8xOC5jc3YiLCAiMTJfMDEuY3N2IiwgIml0aF9SYXcuY3N2Il0KcmVzdWx0ID0gW2YgZm9yIGYgaW4gZmlsZXMgaWYgcmUuc2VhcmNoKHInX1xkezJ9XC5jc3YkJywgZildIApwcmludChyZXN1bHQp