Find different elements individual or series in a list of non duplicate random numbers-CodePudding

I have a list of numbers, for example: [4,5,6,8,229,230,250,170,118,119,120].

I'm trying to make a function that would give:

results = [4 to 6, 8, 118 to 120, 170, 229 to 230, 250]

Thank you for the help.

CodePudding user response：

The question of how the sequences should be represented is unclear. One way would be to have the sequences as tuples within the list - i.e., just storing the first and last numbers in the sequence.

For example:

lst = [4,5,6,8,229,230,250,170,118,119,120]

lst.sort()

result = [lst[0]]

for x in lst[1:]:
    istuple = isinstance(result[-1], tuple)
    y = result[-1][-1] if istuple else result[-1]
    if x - y > 1:
        result.append(x)
    else:
        result[-1] = (result[-1][0], x) if istuple else (result[-1], x)

print(result)

Output:

[(4, 6), 8, (118, 120), 170, (229, 230), 250]