擅长:python、mysql、java
<p>非正则表达式解决方案:</p>
<pre><code>from string import punctuation as punc
def solve(strs):
words = [[]]
for i,x in enumerate(strs.split()):
x = x.strip(punc)
if x[0].isupper() and len(x)>2:
if words[-1] and words[-1][-1][0] == i-1:
words[-1].append((i,x))
else:
words.append([(i,x)])
names = [" ".join(y[1] for y in x) for x in words if 2 <= len(x) <= 4]
return ", ".join(names) if names else None
data = [
'Her name is Emily.',
'I work for Surya Soft.',
'I sent an email for Ery Wulandari.',
'Welcome to the Link Building Partner abc Fooo Foo program!'
]
for x in data:
print solve(x)
</code></pre>
<p><strong>输出:</strong></p>
<pre><code>None
Surya Soft
Ery Wulandari
Link Building Partner, Fooo Foo
</code></pre>