err_187.py

# these should match

# using functions to ensure `l` doesn't change type
def a():
    l = []
    l = reversed(l)

def b():
    l = []
    l = list(reversed(l))

def c():
    l = []
    l = l[::-1]

def c2():
    class Wrapper():
        l: list[int]

    w = Wrapper()
    w.l = list(reversed(w.l))
    w.l = w.l[::-1]
    w.l = reversed(w.l)

# these should not

def d():
    l = []
    _ = reversed(l)

def e():
    l = []
    l = l[::-2]
    l = l[1:]
    l = l[1::-1]
    l = l[:1:-1]

def f():
    d = {}

    # dont warn since d is a dict and does not have a .reverse() method
    d = reversed(d)

def g():
    l = "abc"[::-1]

def h():
    l = reversed([1, 2, 3])

def i():
    l = list(reversed([1, 2, 3]))