Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its case from lower to upper or vise versa,
    otherwise keep it as it is.
    If the string contains no letters, reverse the string.
    The function should return the resulted string.
    Examples
    solve("1234") = "4321"
    solve("ab") = "AB"
    solve("#a@C") = "#A@c"
    """
    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""

        s += i
    if flg == 0:
        return s[len(s)::-1]
    return s

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its case from lower to upper or vise versa,
    otherwise keep it as it is.
    If the string contains no letters, reverse the string.
    The function should return the resulted string.
    Examples
    solve("1234") = "4321"
    solve("ab") = "AB"
    solve("#a@C") = "#A@c"
    """
    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""
    for i in new_str:

    if flg == 0:
        return s[len(s)::-1]
    return s

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its case from lower to upper or vise versa,
    otherwise keep it as it is.
    If the string contains no letters, reverse the string.
    The function should return the resulted string.
    Examples
    solve("1234") = "4321"
    solve("ab") = "AB"
    solve("#a@C") = "#A@c"
    """
    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""
    for i in new_str:
        s += i

        return s[len(s)::-1]
    return s

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its case from lower to upper or vise versa,
    otherwise keep it as it is.
    If the string contains no letters, reverse the string.
    The function should return the resulted string.
    Examples
    solve("1234") = "4321"
    solve("ab") = "AB"
    solve("#a@C") = "#A@c"
    """
    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""
    for i in new_str:
        s += i
    if flg == 0:

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its case from lower to upper or vise versa,
    otherwise keep it as it is.
    If the string contains no letters, reverse the string.
    The function should return the resulted string.
    Examples
    solve("1234") = "4321"
    solve("ab") = "AB"
    solve("#a@C") = "#A@c"
    """
    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""
    for i in new_str:
        s += i
    if flg == 0:
        return s[len(s)::-1]

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def string_to_md5(text):
    """
    Given a string 'text', return its md5 hash equivalent string.
    If 'text' is an empty string, return None.

    >>> string_to_md5('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    """

return hashlib.md5(text.encode('ascii')).hexdigest() if text else None

def check(candidate):

    # Check some simple cases
    assert candidate('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    assert candidate('') == None
    assert candidate('A B C') == '0ef78513b0cb8cef12743f5aeb35f888'
    assert candidate('password') == '5f4dcc3b5aa765d61d8327deb882cf99'

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def string_to_md5(text):
    """
    Given a string 'text', return its md5 hash equivalent string.
    If 'text' is an empty string, return None.

    >>> string_to_md5('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    """
    import hashlib

return hashlib.md5(text.encode('ascii')).hexdigest() if text else None

def check(candidate):

    # Check some simple cases
    assert candidate('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    assert candidate('') == None
    assert candidate('A B C') == '0ef78513b0cb8cef12743f5aeb35f888'
    assert candidate('password') == '5f4dcc3b5aa765d61d8327deb882cf99'

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def generate_integers(a, b):
    """
    Given two positive integers a and b, return the even digits between a
    and b, in ascending order.

    For example:
    generate_integers(2, 8) => [2, 4, 6, 8]
    generate_integers(8, 2) => [2, 4, 6, 8]
    generate_integers(10, 14) => []
    """

    upper = min(8, max(a, b))

    return [i for i in range(lower, upper+1) if i % 2 == 0]

def check(candidate):

    # Check some simple cases
    assert candidate(2, 10) == [2, 4, 6, 8], "Test 1"
    assert candidate(10, 2) == [2, 4, 6, 8], "Test 2"
    assert candidate(132, 2) == [2, 4, 6, 8], "Test 3"
    assert candidate(17,89) == [], "Test 4"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def generate_integers(a, b):
    """
    Given two positive integers a and b, return the even digits between a
    and b, in ascending order.

    For example:
    generate_integers(2, 8) => [2, 4, 6, 8]
    generate_integers(8, 2) => [2, 4, 6, 8]
    generate_integers(10, 14) => []
    """
    lower = max(2, min(a, b))

return [i for i in range(lower, upper+1) if i % 2 == 0]

def check(candidate):

    # Check some simple cases
    assert candidate(2, 10) == [2, 4, 6, 8], "Test 1"
    assert candidate(10, 2) == [2, 4, 6, 8], "Test 2"
    assert candidate(132, 2) == [2, 4, 6, 8], "Test 3"
    assert candidate(17,89) == [], "Test 4"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def generate_integers(a, b):
    """
    Given two positive integers a and b, return the even digits between a
    and b, in ascending order.

    For example:
    generate_integers(2, 8) => [2, 4, 6, 8]
    generate_integers(8, 2) => [2, 4, 6, 8]
    generate_integers(10, 14) => []
    """
    lower = max(2, min(a, b))
    upper = min(8, max(a, b))

return [i for i in range(lower, upper+1) if i % 2 == 0]

def check(candidate):

    # Check some simple cases
    assert candidate(2, 10) == [2, 4, 6, 8], "Test 1"
    assert candidate(10, 2) == [2, 4, 6, 8], "Test 2"
    assert candidate(132, 2) == [2, 4, 6, 8], "Test 3"
    assert candidate(17,89) == [], "Test 4"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"