re.match() this function tries to match pattern with all of string. re.match() function returns the match object into success without failure.

re.match(pattern, string, flag=0)

# A Python program to demonstrate working of re.match().
import re

# Let's use a regular expression to match a date string
# in the form of Month name followed by day number
regex = r"([a-zA-Z]+) (\\d+)"

match = re.search(regex, "I was born on June 24 ")

if match != None:
    # We reach here when the expression "([a-zA-Z]+) (\\d+)"
    # matches the date string

    # This will print [14, 21], since it matches at index 14
    # and ends at 21
    print("Match at index %s, %s" % (match.start(), match.end()))

    # We use group() method to get all the matches and
    # captured groups. The groups contain the matched values
    # In particular:
    # match.group(0) always returns the fully matched string
    # match.group(1), match.group(2), ... return the capture
    # groups in order from left to right in the input string
    # match.group() is equivalent to match.group(0)

    # So this will print "June 24"
    print("Full match: %s" % (match.group(0)))

    # So this will print "June"
    print("Month: %s" % (match.group(1)))

    # So this will print "24"
    print("Day: %s" % (match.group(2)))

else:
    print("The regex pattern does not match.")

Match at index 14, 21
Full match: June 24
Month: June
Day: 24

# A Python program to demonstrate working
# of re.match().
import re

# a sample function that uses regular expressions
# to find month and day of a date
def findMonthAndDate(string):

  regex = r"([a-zA-Z]+) (\\d+)"

  match = re.match(regex, string)

  if match == None:
    print ("Not a valid date")
    return
  
  print ("Given Data: %s" % (match.group()))
  print ("Month: %s" % (match.group(1)))
  print ("Dat: %s" % (match.group(2)))

# Driver Code
findMonthAndDate("Jun 24")
print("")
findMonthAndDate("I was born on June 24")

Given Data: Jun 24
Month: Jun
Dat: 24

Not a valid date

• Pattern: Regular Expression to match
• String: String where the pattern is looked for
• Flags: To determine flag that is different using bitwise OR ( | ).

Comparison between Search and Match

Search

# A Python program to demonstrate working of re.match().
import re

# Let's use a regular expression to match a date string
# in the form of Month name followed by day number
regex = r"([a-zA-Z]+) (\\d+)"

match = re.search(regex, "I was born on June 24 ")

if match != None:
    # We reach here when the expression "([a-zA-Z]+) (\\d+)"
    # matches the date string
    
    print("Match at index %s, %s" % (match.start(), match.end()))
    print("Full match: %s" % (match.group(0)))
    print("Month: %s" % (match.group(1)))
    print("Day: %s" % (match.group(2)))

else:
    print("The regex pattern does not match.")

Match

# A Python program to demonstrate working
# of re.match().
import re

# a sample function that uses regular expressions
# to find month and day of a date
def findMonthAndDate(string):

  regex = r"([a-zA-Z]+) (\\d+)"

  match = re.match(regex, string)

  if match == None:
    print ("Not a valid date")
    return
  
  print ("Given Data: %s" % (match.group()))
  print ("Month: %s" % (match.group(1)))
  print ("Dat: %s" % (match.group(2)))

# Driver Code
findMonthAndDate("Jun 24")
print("")
findMonthAndDate("I was born on June 24")