Title here
Summary here
Python is a high-level, interpreted programming language known for its simplicity and readability.
os.path.join("uploads/", "flag.txt") # uploads/flag.txt
os.path.join("uploads/", "/flag.txt") # /flag.txt
os.path.join("uploads/", "flag.txt") # uploads/../flag.txt
>>> re.match("\.", "../")
<re.Match object; span=(0, 1), match='.'>
>>> re.match("\.", "/../") # no match!