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stringpython-2.7setrepresentation
Zi Xiang
Zi Xiang

Reputation: 31

Conversion of string representation of a set into a set

Given (in Python 2.7)..

myString='{hello,world}'

How do I go about converting the above into the set object {'hello', 'world'} ?

I tried eval(myString), but it throws NameError: name 'hello' is not defined

I tried ast.literal_eval(myString) but it throws ValueError: malformed string

thanks!

Upvotes: 1

Views: 1842

Answers (2)

Jeff
Jeff

Reputation: 29

Looks like you were close. If you put quotes around the individual elements, you can use Python's eval

>>> myString = "{'hello','world'}"
>>> eval(myString)
{'world', 'hello'}

Upvotes: 1

JLT
JLT

Reputation: 3172

In java you can do it this way:

  1. First, if myString always starts with "{" and ends with "}", you get rid of those first by substring.

    String myString = "{hello,world}"; String myStringFixed = myString.substring(1, myString.length() - 1);

The output of myStringFixed now would be "hello,world"

  1. Convert the string into an array throught splitting.

    String[] arrayOfStrings = myStringFixed.split(",");

The output of arrayOfStrings would be ["hello", "world"];

  1. Now you can create a set via that array by running a loop and add those elements to the set.

    Set stringSet = new HashSet();

    for(int i = 0; i < arrayOfStrings.length; i++) { stringSet.add(arrayOfStrings[i]); }

Upvotes: 0

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