How can I check if a string is a valid email address in Python using the email-validator library and regex with additional validation rules for specific email components?
Richard W

To check if a string is a valid email address in Python using theemail-validator library, regex, and additional validation rules for specific email components, you can follow these steps: 1. Install theemail-validator library:

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   pip install email-validator

2. Import the necessary modules and classes:

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   import re
   from email_validator import validate_email, EmailNotValidError

3. Define a function to check if the string is a valid email address with additional validation rules:

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   def is_valid_email(email):
  try:
 # Validate the email using the email-validator library
 v = validate_email(email)
 # Additional validation rules
 # Add any additional validation rules as per your requirements
 if not re.match(r'.+@example\.com', email):
return False
 # Add any other additional validation rules as needed
 return True
  except EmailNotValidError:
 return False

4. Call theis_valid_email function and pass the string to be checked:

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   email = "test@example.com"
   if is_valid_email(email):
  print("Valid email address")
   else:
  print("Invalid email address")

In theis_valid_email function, thevalidate_email() function from theemail_validator library is used to validate the email address format. If the email address format is valid, the function proceeds with additional validation rules specific to your requirements. In the example, a regular expression (r'.+@example\.com') is used to check if the email address belongs to theexample.com domain. This is just an example of an additional validation rule. You can modify the regex pattern to suit your specific requirements. If the email address passes both the format validation using theemail_validator library and any additional validation rules specific to your requirements, the function returnsTrue, indicating that the email address is valid. Otherwise, it returnsFalse. You can modify the code to include any additional checks or handle different types of email address inputs. This approach allows you to dynamically check if a string is a valid email address, considering both theemail_validator library, regex pattern matching, and any additional validation rules for specific email components, in your Python programs.

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