CODEWITHSUNDEEP
pythonpython-3.xprintingformat
Bryan Hildreth
Bryan Hildreth

Reputation: 29

Python print format of integers and string mix

line = [1,2,3,4,5,6,7,9,10,11,12,14,15,16,17,18,19,300]


GroupCount = 0
FormatDesignators =line[0]

for i in range(1 ,len(line)):
    if line[i] != line[i - 1] + 1:
        if GroupCount >= 1:
            FormatDesignators = FormatDesignators,'-', line[i - 1]
            FormatDesignators = FormatDesignators,',',line[i]
            GroupCount = 0
    else:
        GroupCount = GroupCount + 1
print(FormatDesignators)


if GroupCount >= 1:
    FormatDesignators = FormatDesignators,"-",line[i]
    print (FormatDesignators)

Right now it is outputting:

((((((1, '-', 7), ',', 9), '-', 12), ',', 14), '-', 19), ',', 300) and I want it to be 1-7,9-12,14-19,300

Upvotes: 0

Views: 301

Answers (3)

Tom
Tom

Reputation: 8790

The following approach seems to be working. I was trying to make something that only iterated through the data once:

c = 0
result = ''
current = None
run = False

while c < len(line):

    if current == None:
        result += f'{line[c]}'
    elif line[c] - current == 1:
        run = True
        if c == len(line) - 1:
            result += f'-{line[c]}'
    elif run:
        result += f'-{current},{line[c]}'
        run = False
    else:
        result += f',{line[c]}'

    current = line[c]
    c += 1

print(result)
# 1-7,9-12,14-19,300

The first if checks if no numbers have been seen, i.e. only for the first number. The second if notes that the current integer is one greater than the previous, also handling the when the end of the line is reached and is continuing a sequence. The third notes that a sequence has been broken, and adds the output as such. The last else block adds the current value following a non-sequence.

Upvotes: 1

Daniel Hao
Daniel Hao

Reputation: 4980

Would this helps you: (lastly, you could modify the final concatenation as you like in terms of format...)


    >>> line = [1,2,3,4,5,6,7,9,10,11,12,14,15,16,17,18,19,300]
    >>> starts = [x for x in line if x-1 not in line]
    >>> ends = [y for y in line if y+1 not in line]
    >>> ranges = list((a,b) for a, b in zip(starts, ends))
    >>> ranges
    [(1, 7), (9, 12), (14, 19), (300, 300)]
    >>> results = [str(a)+'-'+str(b)  for a, b in ranges]

Upvotes: 1

Delton
Delton

Reputation: 222

try this

line = [1,2,3,4,5,6,7,9,10,11,12,14,15,16,17,18,19,300]


GroupCount = 0
FormatDesignators =line[0]

for i in range(1 ,len(line)):
    if line[i] != line[i - 1] + 1:
        if GroupCount >= 1:
            FormatDesignators = f'{FormatDesignators} - {line[i - 1]},'
            FormatDesignators = f'{FormatDesignators} {line[i]}'
            GroupCount = 0
    else:
        GroupCount = GroupCount + 1
print(FormatDesignators)


if GroupCount >= 1:
    FormatDesignators = f'{FormatDesignators} - {line[i]},'
    print (FormatDesignators)

Upvotes: 1

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