PYTHON

python re search print

>>> import re
>>> reg = re.compile("[a-z]+8?")
>>> str = "ccc8"
>>> print(reg.match(str).group()) #use group() to print the matches
ccc8

python re.search()

  ## Search for pattern 'bb' in string 'aabbcc'.
  ## All of the pattern must match, but it may appear anywhere.
  ## On success, match.group() is matched text.
  match = re.search(r'bb', 'aabbcc') # found, match.group() == "bb"
  match = re.search(r'cd', 'aabbcc') # not found, match == None

  ## . = any char but 

  match = re.search(r'...c', 'aabbcc') # found, match.group() == "abbc"

  ## d = digit char, w = word char
  match = re.search(r'ddd', 'p123g') # found, match.group() == "123"
  match = re.search(r'www', '@@abcd!!') # found, match.group() == "abc"

re.search() Python

import re

string = "Python is fun"

# check if 'Python' is at the beginning
match = re.search('APython', string)

if match:
  print("pattern found inside the string")
else:
  print("pattern not found")  

# Output: pattern found inside the string

Python re.search()

match = re.search(pattern, str)

re.search with regex python

re.search(pattern, string, flags=0)
# pattern: The first argument is the regular expression pattern we want to search inside the target string.
# string: The second argument is the variable pointing to the target string (In which we want to look for occurrences of the pattern).
# flags: Finally, the third argument is optional and it refers to regex flags by default no flags are applied.

re.search

exp = "(d{1,3}.){3}d{1,3}"
ip = "blah blah 192.168.0.185 blah blah"
match = re.search(exp, ip)
print match.group()

find and re.search in python

# This is how we use find
# Open a file
hand = open('path and the name of the file')
count1 = 0
for line in hand:
    # remove new line (/n) at the end of the line
    line = line.rstrip()
    # If there is no 'From' it will give a -1
    if line.find('Enter the sub string here')>= 0:
        count1 += 1
        print(count1, line)
# Close the file
hand.close()

# This is how we use re.search()
import re
count2 = 0
hand2 = open('path and the name of the file')
for line2 in hand2:
    line2 = line2.rstrip()
    if re.search('Enter the sub string here', line2):
        count2 += 1
        print(count2, line2)
# Close the file
hand2.close()