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- from __future__ import unicode_literals
- def truncate_sentence(text, max_chars, break_words=False, padding=0):
- """Truncates a sentence.
- :param max_chars: The maximum characters of truncated sentence.
- :param break_words: If you wish to truncate given sentence strictly even
- if it breaks a word, set it to ``True``. It defaults
- to ``False`` which means truncating given sentence
- shorter but never breaking words.
- :param padding: The padding size for truncating. It is usually used to
- keep spaces for some ending characters such as ``"..."``.
- :return: The truncated sentence.
- """
- if break_words:
- return text[:-abs(max_chars - len(text)) - padding]
- words = []
- for word in text.split():
- predicted_len = (
- sum(map(len, words)) + # length of words
- len(word) + # length of next word
- len(words) - 1 + # length of spaces
- padding)
- if predicted_len >= max_chars:
- break
- words.append(word)
- return ' '.join(words)
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