These are the implementations I added to my library:
```python
def findalliter(pattern, string, flags=0):
'''
like finditer(), but with return values like findall()
implementation taken from cpython/Modules/_sre.c/findall()
'''
for m in re.finditer(pattern, string, flags=flags):
g = m.groups()
if len(g) == 1:
yield g[0]
elif g:
yield g
else:
yield m.group()
def findfirst(pattern, string, flags=0, default=_undefined):
"""
Avoids using the inefficient findall(...)[0], or first(findall(...))
"""
return first(findalliter(pattern, string, flags=flags), default=default)
```
Fon *first()*, maybe calling it *take_one()* will clear up
misunderstandings about it's semantics.
--
Juancarlo *Añez*
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