convert a string into a dictionary

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convert a string into a dictionary



What is one of the pythonic ways to convert a string which has a built-in dictionary formatting into a dictionary? I have tried regex but it isn't quite there to be the right formatting .


string_dictable ="""name"":""Andrew,Carnegie"",""short_name"":""And,Car"",
""YOB"":1835,""Citizen"":""Scottish"""



All the extra quotation paddings seem to be the problem and so far I haven't been able to work around them.



My expected output is:


dicted_string ="name":"Andrew, Carnegie","short_name":"And,Car","YOB":1835,"Citizen":"Scottish"



I have also tried


ast.literal_eval (string_dictable)



to no avail.



EDIT:
I haven't touched the original formatting and unfortunately, the original question cannot be clarified or modified. Thanks all for the contribution though.
As I have said the regex solution got me this


'name': 'Andrew,Carnegie,short_name:And,Car,YOB:1835,Citizen:Scottish'



and it isn't exactly what I needed to do some work on.





Where did you get that string in first place? Can't you make it better from the source?
– nosklo
Aug 10 at 14:34





you can try ast.literal_eval(yourstring.replace('""', '"'))
– nosklo
Aug 10 at 14:35


ast.literal_eval(yourstring.replace('""', '"'))





It looks like someone thinks that Python strings escape " characters by doubling up on them. That's not the case. String literals that are next to each other are automatically concatenated, so "abc""123" evaluates to "abc1123"
– Patrick Haugh
Aug 10 at 14:37



"


"abc""123"


"abc1123"





Are you getting this from some other file in this format, or are you writing these string literals into the python file? If you are getting them from a file, could we see a line or two of that file?
– Patrick Haugh
Aug 10 at 14:47




4 Answers
4



Your string_dictable has syntax errors (it has two quotation marks where there should be one). Try this:


string_dictable


string_dictable = '"name":"Andrew,Carnegie","short_name":"And,Car", "YOB":1835,"Citizen":"Scottish"'
dict = ast.literal_eval (string_dictable)





the quotations are part of the formatting. it isn't an error
– Benyam
Aug 10 at 14:39



Solution using


import json
dicted_string = json.loads(string_dictable.replace('""','"')



There is no elegant way that I know of which will handle the double double quotes in the original string, otherwise the string is basically good json format.



If you are able to change the source of your string to eliminate the double double quotes ("") then you can simply feed string_dictable to json.loads to get a dictionary out of the string.



Just replace "" with " and use eval() then.
It's pretty easy, just like this:


string_dictable ='""name"":""Andrew,Carnegie"",""short_name"":""And,Car"",""YOB"":1835,""Citizen"":""Scottish""'
string_dictable = string_dictable.replace('""','"')
d = eval(string_dictable)



d is a valid dictionary.





If the input is being given as string_dictable ="""name"":""Andrew,Carnegie"",""short_name"":""And,Car"", ""YOB"":1835,""Citizen"":""Scottish""" then this solution doesn't work. Since you already replaced the outer " with ' which apparently is wrong (see my answer being downvoted)
– J0hn
Aug 10 at 14:47


string_dictable ="""name"":""Andrew,Carnegie"",""short_name"":""And,Car"", ""YOB"":1835,""Citizen"":""Scottish"""





It's a bit weird that the answer is downvoted. The solution seems to be pretty easy and straightforward since the problem is just with the double quote character.
– Ildar Akhmetov
Aug 10 at 14:48





@J0hn but string_dictable ="""name"":""Andrew,Carnegie"",""short_name"":""And,Car"", ""YOB"":1835,""Citizen"":""Scottish""" is not a correct Python expression... It means that the questions makes no sence.
– Ildar Akhmetov
Aug 10 at 14:49





Exactly, this question requires some more information about where this input is coming from and why it's so incorrect. The question should likely be closed since it's impossible to solve with the current info given.
– J0hn
Aug 10 at 14:51





stackoverflow.com/questions/1832940/…
– DYZ
Aug 11 at 4:46



Okay replacing this answer almost entirely but leaving the original below.



So from what I've gathered, the current issue is that the OP has a text file with the following inside of it:
"""name"":""Andrew,Carnegie"",""short_name"":""And,Car"",""YOB"":1835,""Citizen"":""Scottish"""


"""name"":""Andrew,Carnegie"",""short_name"":""And,Car"",""YOB"":1835,""Citizen"":""Scottish"""



So, when reading the file into python, this is what needs to happen:


f = open('stack.txt','r+') #I've made a text file with the above inside of it named stack.txt
for i in f:
fixed = str(i).replace('"', "'")
fixed = fixed.replace("''", '"')
d = eval(fixed)



d will now be formatted as such: "name":"Andrew,Carnegie","short_name":"And,Car","YOB":1835,"Citizen":"Scottish"


"name":"Andrew,Carnegie","short_name":"And,Car","YOB":1835,"Citizen":"Scottish"



The first fix changes it to: '''name'':''Andrew,Carnegie'',''short_name'':''And,Car'',''YOB'':1835,''Citizen'':''Scottish'''


'''name'':''Andrew,Carnegie'',''short_name'':''And,Car'',''YOB'':1835,''Citizen'':''Scottish'''



Second run through fixes the '' issue:
'"name":"Andrew,Carnegie","short_name":"And,Car","YOB":1835,"Citizen":"Scottish"'


'"name":"Andrew,Carnegie","short_name":"And,Car","YOB":1835,"Citizen":"Scottish"'



Finally the eval turns it into a dictionary.



Very easily using eval(string)


eval(string)



Here's a quick mock-up I did. Make sure to use similar syntax, and you should be good to go.


>>> String = '"name":"Andrew,Carnegie","short_name":"And,Car", "YOB":1835,"Citizen":"Scottish"'
>>> dictionary = eval(String)
>>> dictionary['name']
'Andrew,Carnegie'
>>>



EDIT: Not sure why this is being downvoted so far, the eval() method is the easiest way to convert a string to dictionary, if the input can't be modified by OP then I can work on a solution but the issue is that the original string can't even be read by Python:


eval()


>>> string_dictable ="""name"":""Andrew,Carnegie"",""short_name"":""And,Car"",
""YOB"":1835,""Citizen"":""Scottish"""
SyntaxError: EOL while scanning string literal



So unless it's stored in a text file and the variable can be modified as it's input there's not much that can be done from a python standpoint.





Note that string_dictable in the above evaluates to 'name:Andrew,Carnegie,short_name:And,Car,YOB:1835,Citizen:Scottish'
– Patrick Haugh
Aug 10 at 14:36


string_dictable


'name:Andrew,Carnegie,short_name:And,Car,YOB:1835,Citizen:Scottish'





@PatrickHaugh Not sure what you're getting at, I edited his syntax so that it's not wrong. If he needs to modify the input for it to work then he should clarify that.
– J0hn
Aug 10 at 14:38





@timgeb the original syntax is literally impossible for python to handle, unless this is being pulled from a file (which OP hasn't stated how or why it's formatted as such) then there's nothing that can be done.
– J0hn
Aug 10 at 14:44





@J0hn the string is presented here in its original formatting. It is part of a file I can't share here.
– Benyam
Aug 10 at 15:02





Regardless, that helps to know you're taking this out of a file. Are you using a method like f = open("file.txt', "r"')? Furthermore, is it stored in the text file with the string_dictable = part, or just the messed up dictionary? I need EXACTLY how it's stored given to me so I can fix this for you.
– J0hn
Aug 10 at 15:06



f = open("file.txt', "r"')


string_dictable =






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