Extract data using symbols:
- We can create expressions using symbols.
- To extract the data, we use symbols and operators in regular expressions.
Split the string into characters: Using dot(.) as a raw string, we can split into characters including spaces.
import re
line = "Python and Java"
arr = re.findall(r'.' , line)
print(arr)
print("Number of characters :", len(arr))
print("Count of 'a' :", arr.count('a'))
Excluding spaces: ‘\w’ represents a word in the input string
import re
line = "Python and Java"
arr = re.findall(r'\w' , line)
print(arr)
print("Number of characters :", len(arr))
Word split including spaces:
import re
line = "Python and Java"
arr = re.findall(r'\w*' , line)
print(arr)
print("Length is :", len(arr))
Word split excluding spaces:
import re
line = "Python and Java"
arr = re.findall(r'\w+' , line)
print(arr)
print("Number of words :", len(arr))
Extract the first word in input string.
import re
line = "Python and Java"
word = re.findall(r'^\w+' , line)
print("First word :", word)
Extract the first word in input string.
import re
line = "Python and Java"
word = re.findall(r'\w+$' , line)
print("Last word :", word)
Meta characters: A special meaning of Meta characters is called characters
Character Description Example
[] A set of characters “[a-m]”
\ Signals a special sequence “\d”
. Any character (except newline character) “he..o”
^ Starts with “^hello”
$ Ends with “world$”
* Zero or more occurrences “aix*”
+ One or more occurrences “aix+”
