# Is your regex perfectly correct yet still not working?

# You may be using re.match() instead of re.search()

# Difference between match() and search():

# -> Match: Only checks if the RE matches at the beginning of the string

# -> Search: Scan forward through the string for a match

​

# | Wrong |

print(re.match('super', 'superstition').span())

# -> (0, 5)

print(re.match('super', 'insuperable'))

# -> None

​

# | Right |

print(re.search('super', 'superstition').span())

# -> (0, 5)

print(re.search('super', 'insuperable').span())

# -> (2, 7)