Exerceses_Error_Handlink

# Exerceses Error Handlink
# email_validator_HOMEWORK
from re import findall


class NameTooShortError(Exception):
    pass


class MustContainAtSymbolError(Exception):
    pass


class InvalidDomainError(Exception):
    pass


class MoreThanOneAtSymbolError(Exception):
    pass


class InvalidNameError(Exception):
    pass


MIN_LENGTH = 4

VALID_DOMAINS = (".com", ".bg", ".net", ".org")

pattern_name = r'\w+'
pattern_domain = r'\.[a-z]+'

email = input()

while email != "End":

    if email.count("@") > 1:
        raise MoreThanOneAtSymbolError("Email should contain only one @ symbol!")

    if len(email.split("@")[0]) < MIN_LENGTH:
        raise NameTooShortError("Name must be more than 4 characters!")

    if "@" not in email:
        raise MustContainAtSymbolError("Email must contain @!")

    if findall(pattern_name, email)[0] != email.split("@")[0]:
        raise InvalidNameError("Name can contain only letters, digits and underscores!")

    if findall(pattern_domain, email)[-1] not in VALID_DOMAINS:
        raise InvalidDomainError("Domain must be one of the following: .com, .bg, .org, .net")

    print("Email is valid")

    email = input()


# Numbers_dictionary_ Homework
numbers_dictionary = {}

line = input()
while line != "Search":
    numbers_as_string = line

    try:
        number = int(input())
        numbers_dictionary[numbers_as_string] = number
    except ValueError:
        print(f"The variable number must be an integer")
    line = input()


line = input()
while line != "Remove":
    searched = line
    try:
        print((numbers_dictionary[searched]))
    except KeyError:
        print(f"Number does not exist in dictionary")
    line = input()

line = input()
while line != "End":
    searched = line
    try:
        del numbers_dictionary[searched]
    except KeyError:
        print(f"Number does not exist in dictionary")
    line = input()

print(numbers_dictionary)