html = """
...
<tt class="descname">all</tt>
<big>(</big>
<em>iterable</em>
<big>)</big>
<a class="headerlink" href="#all" title="Permalink to this definition">¶</a>
...
"""
I want to get all text between starting tag big upto before the first occurrence of a tag. This means if I take this example, then i must get (iterable) as a string.