s = '100 NORTH MAIN ROAD'
s1 = s.replace('ROAD', 'RD.')
print s1
100 NORTH MAIN RD.

s = s + " "
s = s + s + s
print s
100 NORTH MAIN ROAD 100 NORTH MAIN ROAD 100 NORTH MAIN ROAD 

s1 = s.replace('ROAD', 'RD.')
print s1
100 NORTH MAIN RD. 100 NORTH MAIN RD. 100 NORTH MAIN RD. 

print s
100 NORTH MAIN ROAD 100 NORTH MAIN ROAD 100 NORTH MAIN ROAD 

s1 = s.replace('ROAD', 'RD.',2)
print s1
100 NORTH MAIN RD. 100 NORTH MAIN RD. 100 NORTH MAIN ROAD 


import re
s = "100 NORTH BROAD ROAD"
s2 = re.sub('ROAD', 'RD.', s)
print s2
100 NORTH BRD. RD.

s2 = re.sub('ROAD$', 'RD.', s)
print s
100 NORTH BROAD ROAD

print s2
100 NORTH BROAD RD.


str = 'Wow Thaaaaaaaaaaaaaat issssssssssssss greeeeeaaaaat'
str = re.sub('a+', 'a', str)
print str
Wow That issssssssssssss greeeeeat

str = re.sub('s+', 's', str)
str = re.sub('e+', 'e', str)
print str
Wow That is great


str = "987 56 abc ab65 123 0 045 8 5.68"
p = re.compile("[0]|[1-9][0-9]*")
print p
<_sre.SRE_Pattern object at 0x00000000040041F0>
nums = p.findall(str)
print nums
['987', '56', '65', '123', '0', '0', '45', '8', '5', '68']

p = re.compile(r"\b[0]\b|\b[1-9][0-9]*\b")
nums = p.findall(str)
print nums
['987', '56', '123', '0', '8', '5', '68']


words = "alley bird birdy early yellow orange orangey"
p = re.compile("[aeiou][a-z]*[y]")
matches = p.findall(str)
matches = p.findall(words)
print matches
['alley', 'irdy', 'early', 'orangey']

p = re.compile("\b[aeiou][a-z]*[y]\b")
matches = p.findall(words)
print matches
[]
# NOTE: Must use r before string with using backslashes
p = re.compile(r"\b[aeiou][a-z]*[y]\b")
matches = p.findall(words)
print matches
['alley', 'early', 'orangey']


words = 'fast long ' + words
print words
fast long alley bird birdy early yellow orange orangey

words = 'past paste ' + words
print words
past paste fast long alley bird birdy early yellow orange orangey

p = re.compile(r"\b[a-z][a-z][a-z][a-z]\b")
matches = p.findall(words)
print matches
['past', 'fast', 'long', 'bird']

p = re.compile(r"\b[a-z]*4\b")
matches = p.findall(words)
print matches
[]

p = re.compile(r"\b[^f][a-z]*[a][s][a-z]*\b")
matches = p.findall(words)
print matches
['past', ' paste', ' fast']

p = re.compile(r"\b[^f\s][a-z]*[a][s][a-z]*\b")
matches = p.findall(words)
print matches
['past', 'paste']


p = re.compile(r"\b[a-eg-z][a-z]*[a][s][a-z]*\b")
matches = p.findall(words)
print matches
['past', 'paste']