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to write a python dict to a text file:

f = open(‘text.file’,'w’)

f.write(my_dict)

to read a python dict from a text file:

f = open(‘text.file’,'r’)

my_dict = eval(f.read())


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7 Responses to “read or write a python dict to/from a text file.”

  1. on 01 Oct 2007 at 2:00 pm Eric Brunson

    Trusted input is a huge factor in using eval(). I’d suggest using the shelve module for persisting data like that, it’s more robust and not subject to code injection attacks for what you’ve done, but is actually more fully featured.

    Details can be found here: http://docs.python.org/lib/node329.html

  2. on 21 Jun 2010 at 2:13 am Jonathan

    I had to change your code to the following to get it to work:

    f = open(’text.file’,’w’)
    f.write(str(my_dict))
    f.close()

    The close function isn’t necessary, but it is good if you are not exiting immediately.

    Thanks for the post.

  3. on 29 Mar 2012 at 11:45 am Mathieu

    def eval1(x):
    try: return eval(x)
    except: return x
    A = { eval1(y[0]) : eval1(y[1]) for y in [x.split() for x in open(filename).readlines()] }

  4. on 30 Aug 2012 at 12:39 pm Graham Jeffries

    a two line solution:

    with open(‘text.file’,'w’) as f:
    f.write(str(my_dict))

  5. on 10 Nov 2012 at 5:19 am Sanjeev Kumar

    proper way of doing

    try:
    output_fav_file=open(self.favFile,”w”)
    output_fav_file.write(str(self.favItems))
    except Exception as er:
    print er
    finally:
    output_fav_file.close()

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