(s, t)
return True
:type s: str
    :type t: str
    :rtype: bool
:type s: str
    :type t: str
    :rtype: bool
: type s : str : type t : str : rtype : bool
def is_one_edit(s, t):
    """
    :type s: str
    :type t: str
    :rtype: bool
    """
    if len(s) > len(t):
        return is_one_edit(t, s)
    if len(t) - len(s) > 1 or t == s:
        return False
    for i in range(len(s)):
        if s[i] != t[i]:
            return s[i+1:] == t[i+1:] or s[i:] == t[i+1:]
    return True
def is_one_edit ( s , t ) : if len ( s ) > len ( t ) : return is_one_edit ( t , s ) if len ( t ) - len ( s ) > 1 or t == s : return False for i in range ( len ( s ) ) : if s [ i ] != t [ i ] : return s [ i + 1 : ] == t [ i + 1 : ] or s [ i : ] == t [ i + 1 : ] return True