Vicky Pryce, the ex-wife of Chris Huhne, told ITV News that prison had a "positive" effect on her and not "a lasting, negative impact."
Former politician Chris Huhne described prison as a "humbling and sobering experience", after he and ex-wife Vicky Pryce were released.
Former Cabinet minister Chris Huhne and his ex-wife Vicky Pryce have both been jailed for eight months over the speeding points scandal.
Economist Vicky Pryce, who spent two months in prison earlier this year, has said that women behind bars have "special needs".
She said it was not a case of making prison "softer" for female offenders, but of minimising the wider impact and costs on society.
Pryce was sentenced to eight months in prison in March for perverting the course of justice by taking speeding points for her former husband Chris Huhne in 2003.
Vicky Pryce, the former wife of disgraced cabinet minister Chris Huhne, has told ITV News she believes the UK prison system is not fit for purpose.
The economist was speaking following her own spell behind bars for taking her ex-husband's speeding points.
Ms Pryce spoke to ITV News political correspondent Romilly Weeks:
Deputy Prime Minister Nick Clegg has distanced himself from claims by former Cabinet minister Chris Huhne that he was targeted by Rupert Murdoch's newspapers because he called for an inquiry into phone hacking.
Former Energy Secretary Huhne claimed the News of the World hired a private investigator to gain information about an extra-marital affair which ultimately led to the break-up of his marriage after he spoke out about hacking.
Huhne, who left Parliament after being jailed for persuading his then wife to take his speeding points, then accused the Sunday Times of "grooming" his ex-wife Vicky Pryce so she would reveal all about the speeding points.
Speaking at his monthly Whitehall press conference, Mr Clegg - who emphasised the importance of newspapers holding public figures to account - said: "Chris has to speak for himself. All I can tell you is that is his opinion.
"Is it exactly my opinion? No it isn't because, guess what, we're different people. I'm not Chris's keeper."
Former Energy Secretary Chris Huhne has attacked "the Murdoch press" for its role in the speeding points swap scandal which led to the jailing of him and his ex-wife.
Writing in the Guardian newspaper, he admitted that "[his] own behaviour has not helped" but said he believes his calls for the Metropolitan Police to reopen their hacking investigation turned the editors of certain publications against him.
"The News of the World sparked the end of my marriage, but another Murdoch title, the Sunday Times, then groomed my ex-wife until she told them about the speeding points," he said.
Disgraced former MP Chris Huhne has been hired as the manager of an energy firm just months after being released from prison.
The Government's ex-energy and climate change cabinet secretary has been working as the European manager of Zilkha Biomass Energy since July, according to the company's website.
He was jailed in March for eight months along with his ex-wife Vicki Pryce for swapping speeding penalty points so he could avoid a driving ban, but the pair were released in May.
The sustainable energy company says on its website that Mr Huhne is tasked with "the remit of growing the business in the European Union".
His new role is reported to be earning him £100,000 a year, the Sun said.
Vicky Pryce, who was released from jail today, will publish a book based on the diaries she kept during her two months in prison.
The book, titled Prisonomics, will be published in early September but will not be a full memoir, Biteback Publishing said.
Pryce said: "I am pleased Biteback will again be publishing a book of mine. I kept a diary while in prison and I have some strong views on how the prison system works, especially with regard to how it treats women.
"I will use personal experience to back up my arguments but I must be clear that this book is more than a memoir - it will analyse how prison works, and should work, very much from an economic perspective."
Chris Huhne's former wife was released from jail after serving two months of an eight-month sentence for perverting the course of justice.
Chris Huhne had to tell reporters to "calm down" as he arrived back at his London home amid chaotic scenes. In a short statement, he said after the humbling experience of prison he just wanted to get on with life.
Former Cabinet Minister Chris Huhne has described prison as a "humbling and sobering experience". He thanked supporters for standing by him as he returned to his London home.