Hi does anyone know why this code returns a “No” and the other one returns a “Yes”?
import re b="@gmail.com" x=re.findall(r"Bgmail",b) if x: print("Yes") else: print("No") # <<< import re b="agmail.com" x=re.findall(r"Bgmail",b) if x: print("Yes") # <<< else: print("No")
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Answer
As b
is word boundary, B
is the opposite
Your regex "Bgmail"
ask for :
gmail
word- with NO word boundary before it
@gmail.com ^^ there is a word boundary between these 2 chars, so regex don't match agmail.com ^^ there is NO word boundary between these 2 chars, so regex match