python - How do you use the replace method properly?

Question

phone_numbers = {"John Smith": "+37682929928", "Marry Simpsons": "+423998200919"}

Loop over the phone_numbers values and in each loop print out the phone number, but with 00 instead of the +. In other words, your code should output: 0037682929928 00423998200919

new_phonenu=[]
for num in phone_numbers:
    new_phonenu = str.replace("+","00")
    new_phonenu.append(str)

question from:https://stackoverflow.com/questions/65837083/how-do-you-use-the-replace-method-properly

Answer 1

Use a one-line for loop to iterate through and perform an operation on each element in a list really quickly.

phone_numbers = {"John Smith": "+37682929928", "Marry Simpsons": "+423998200919"}

new_phonenu = [num.replace('+','00') for num in phone_numbers.values()]

print(*new_phonenu)

Output:

0037682929928 00423998200919

Edit: If you want to include the keys, use

phone_numbers = {"John Smith": "+37682929928", "Marry Simpsons": "+423998200919"}
new_phonenu = {k:num.replace('+','00') for k,num in phone_numbers.items()}
print(new_phonenu)