CODEWITHSUNDEEP
pythonpython-3.x
August Williams
August Williams

Reputation: 929

How to print a list as a set, but without removing duplicates?

I have a list such as:

myList = [1, 0, 0, 0, 1, 2]

I would like to print this as set listing notation:

{1, 0, 0, 0, 1, 2}

However, when I try to print this as a set, the duplicates are removed:

>>> set(mylist)
{0, 1, 2}

I do not want the duplicates to be removed. How can I print with set syntax, but without removing any duplicates?

Upvotes: 0

Views: 57

Answers (1)

mgilson
mgilson

Reputation: 309929

Seems like simple string manipulation would work:

list_str = str(mylist).replace('[', '{').replace(']', '}')

Or, perhaps even better, we can just slice off the first and last characters of the list formatted string and replace them with the new braces that you want:

list_str = '{%s}' % (str(mylist)[1:-1])

This is better for the obvious reason that it doesn't have a chance to mess with the contents of the list (imagine using the previous code if your list contained strings that may or may not have '[' characters embedded in them).

If that still doesn't sit well with you, you can format the whole string yourself in a number of ways (usually involving getting a string representation of each item and joining them with a comma and space).

list_str = '{%s}' % (', '.join(repr(item) for item in mylist))
list_str = '{%s}' % (', '.join(map(repr, mylist)))

Upvotes: 7

Related Questions