import re
from lxml import etree
doc = \
"""
<body>
<img alt='fdsfsd' src='CONST text1 text2'/>
adasd
<img alt='sadsdd' src='CONST text3 text4'/>
adasdas
</body>
"""
tree = etree.fromstring(doc, parser=etree.HTMLParser())
for img in tree.xpath('//img[@src]'):
img.attrib['src'] = re.sub(r'\s+', '_', img.attrib['src'])
zip(a, b, c)
[list(l) for l in zip(a, b, c)] #если нужны именно листы внутри
x = [[a[i], b[i], c[i]] for i in range(min(len(a), len(b), len(c)))]x = list(map(list, zip(a, b, c))) 