Question 58313 in Telegram API Question posted in
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How to split a string in equal chunks at certain character in Python? – Telegram API

So there is a string of values separated by n.
for example:
"link1nlink2nlink3nlink4n"
I’m trying to send a message in telegram API but it has a length limit of 4050 characters. How can split the string into chunks of 4050 chars or less at n characters so it doesn’t mess up any links?
so I want the end result to be a list of strings containing 4050 characters or less, and the original list splitting points should be at "n" character.

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2

Answers


  1. 0

    You can use .split() and list comprehension:

    a = "link1nlink2nlink3nlink4n"
b = a.split('n')
[i for i in b if len(i)<4050 and i]

    Output:

    ['link1', 'link2', 'link3', 'link4']
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  2. 0

    You can use textwrap.wrap:

    import textwrap
textwrap.wrap(s, width=4050)

    example:

    s = "link1nlink2nlink3nlink4n"*1000

# get chunks
chunks = textwrap.wrap(s, width=4050)

# get size
list(map(len, chunks))
#[4049, 4049, 4049, 4049, 4049, 3749]

    Alternative to break on n exactly:

    def split(s, max_len=4050):
    out = []
    start = 0
    last_n = None
    for i, c in enumerate(s):
        if c == 'n':
            last_n = i
        if i-start>max_len or i+1 == len(s):
            out.append(s[start:last_n+1])
            start = last_n+1
    return out
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