findHtmlTags.py

# ---------------
# User Instructions
#
# Write a function, findtags(text), that takes a string of text
# as input and returns a list of all the html start tags in the 
# text. It may be helpful to use regular expressions to solve
# this problem.

import re
from string import split

def findtags(text):
    tags = []
    for line in split(text, '\n'):
        matchResult = re.findall('<\s*[a-z]+\s*[\w\"=\.]*>', line)
        if matchResult: tags.append(*matchResult)
    print tags
    return tags

def returnTagFromLine(line):
    m = re.match('(<\s*[a-z]+\s*[\w\"=\.]+>)', line)
    print re.findall('<[a-z]+ [\w\"=\.]+>', line)
    if m: print m.group(1)
    #return Fail if (not m) else (m.group(1), text[m.end():])
    

testtext1 = """
My favorite website in the world is probably 
<a href="www.udacity.com">Udacity</a>. If you want 
that link to open in a <b>new tab</b> by default, you should
write <a href="www.udacity.com"target="_blank">Udacity</a>
instead!
"""

testtext2 = """
Okay, so you passed the first test case. <let's see> how you 
handle this one. Did you know that 2 < 3 should return True? 
So should 3 > 2. But 2 > 3 is always False.
"""

testtext3 = """
It's not common, but we can put a LOT of whitespace into 
our HTML tags. For example, we can make something bold by
doing <         b           > this <   /b    >, Though I 
don't know why you would ever want to.
"""

def test():
    assert findtags(testtext1) == ['<a href="www.udacity.com">', 
                                   '<b>', 
                                   '<a href="www.udacity.com"target="_blank">']
    assert findtags(testtext2) == []
    assert findtags(testtext3) == ['<         b           >']
    return 'tests pass'

print test()