Challenge¶

Consider "the quick brown fox jumps over the lazy dog" as text, a) Search for o and show adjacent characters: b) Search for three-letter words enclosed by whitespace: c) Substitute any of dflj by a w:

import re
text = "the quick brown fox jumps over the lazy dog"
print(re.findall(".o.", text))
print(re.findall("\s(\wo\w)\s*", text))
print(re.sub("[dflj]", "w", text))
print(re.search('jumps|swims', text))

Recognize phone numbers in Germany

import re
pattern = re.compile("(00|0 0|\+)\s*4\s*9[0-9 ]+")
text = [
"0049 190 34 57 90",
"+49 190 34 57 90",
"00 00 00 49 190 34 57 90 33",
"00 49 190 34 57 90",
"0049190345790",
"+48 60 60 606 9",
"+41 55 55 55 55"
]
for e in text:
    if pattern.match(e):
        print(e, "is a German phone number")
    else:
        print(e, "is some other number")

checking if a string starts with '>'

import re;
p = re.compile( '^>' )
m = p.match( '>hello' )
if m:
    print 'Match found: ', m.group()
else:
    print 'No match'

matchin more than one pattern on the same string

m=re.search("^>|^#",line)
if m:
    print 'Match found: ', m.group()

Consider a text "All digits are 0 12 245 6789" a) pattern to find three consecutive digits b) compile string pattern to re.Pattern object c) print the type of compiled pattern

import re str = "All digits are 0 12 245 6789" string_pattern = r"\d{3}" regex_pattern = re.compile(string_pattern) print(type(regex_pattern)) result = regex_pattern.findall(str) print(result)