如何忽略空行，而在使用Python中.next
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def bs_preprocess(html):
"""remove distracting whitespaces and newline characters"""
pat = re.compile('(^[\s]+)|([\s]+$)', re.MULTILINE)
html = re.sub(pat, '', html) # remove leading and trailing whitespaces
html = re.sub('\n', ' ', html) # convert newlines to spaces
# this preserves newline delimiters
html = re.sub('[\s]+<', '<', html) # remove whitespaces before opening tags
html = re.sub('>[\s]+', '>', html) # remove whitespaces after closing tags
return html
"""remove distracting whitespaces and newline characters"""
pat = re.compile('(^[\s]+)|([\s]+$)', re.MULTILINE)
html = re.sub(pat, '', html) # remove leading and trailing whitespaces
html = re.sub('\n', ' ', html) # convert newlines to spaces
# this preserves newline delimiters
html = re.sub('[\s]+<', '<', html) # remove whitespaces before opening tags
html = re.sub('>[\s]+', '>', html) # remove whitespaces after closing tags
return html
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