Escaping quotes in string
Question:
I have a python dictionary e.g.:
[{"pk":"1","name":"John","size":"1/4" "},{},{},etc]
That size is 1/4 inch,how would I “escape” that quote? So it still would display it as 1/4″,
Its a list of things, so I cant just manually code it like 1/4",
I tried replace('"','"')
EDIT:
The orginal list is a textfield in my Django models:
[{'pk': '91', 'size': '', 'name': 'Thread Flat For BF', 'quantity': '2'}, {'pk': '90', 'size': '', 'name': 'Blade Holders Straight ', 'quantity': '26'},{'size':'3"','name':'2m 1/4" Round bar', 'quantity':'43'},{'size':'5','name':'2m 1/8" Round bar', 'quantity':'4'}]
Next step I have to prepare the list for jQuery, so I replace like this so its in the correct syntax for json.
mat_list = manufactured_part.material_list.replace(“‘”,'”‘)
Then I have this list:
[{"pk": "91", "size": "", "name": "Thread Flat For BF", "quantity": "2"}, {"pk": "90", "size": "", "name": "Blade Holders Straight ", "quantity": "26"},{"size':"3"","name':"2m 1/4" Round bar", "quantity":"43"},{"size":"5","name":"2m 1/8" Round bar", "quantity":"4"}]
So now the list is sent to the template and I loop through it with jquery, but the list is broken because of the ” in the strings.
SO…I need to escape those ” for the list to work, otherwise it has an obvious syntax error.
Hope this makes sense now.
Thanks
Answers:
You need to escape your backslash in the replace in order to get it printed. Try
replace('"','\"')
There’s no need to do it the hard way. Let Django serialize the query set for you.
I had same problem, I used a python inbuilt escaping method.
something like this helped me
[{"pk":"1","name":"John","size":"1/4" "},{},{},etc]
Ref:-
http://docs.python.org/2/reference/lexical_analysis.html#string-literals
You say:
I have to prepare the list for jQuery
So I assume you are trying to output Python objects in string form into a template file, transformed so that the output string is valid Javascript code.
This is equivalent to serializing them as JSON.
This is a solved problem, instead of replacing single quotes with double quotes etc yourself just do this:
import json
my_python_data = [{'pk': '91', 'size': '', 'name': 'Thread Flat For BF', 'quantity': '2'}, {'pk': '90', 'size': '', 'name': 'Blade Holders Straight ', 'quantity': '26'},{'size':'3"','name':'2m 1/4" Round bar', 'quantity':'43'},{'size':'5','name':'2m 1/8" Round bar', 'quantity':'4'}]
str_to_output_in_js_template = json.dumps(my_python_data)
This will handle all the escaping for you and ensure that the result is a valid Javascript object.
Using
shlex.quote("string")
or
pipes.quote("string")
Depending on the python version worked for me.
You can check here more details
https://github.com/python/cpython/blob/master/Lib/shlex.py#L281
I have a python dictionary e.g.:
[{"pk":"1","name":"John","size":"1/4" "},{},{},etc]
That size is 1/4 inch,how would I “escape” that quote? So it still would display it as 1/4″,
Its a list of things, so I cant just manually code it like 1/4",
I tried replace('"','"')
EDIT:
The orginal list is a textfield in my Django models:
[{'pk': '91', 'size': '', 'name': 'Thread Flat For BF', 'quantity': '2'}, {'pk': '90', 'size': '', 'name': 'Blade Holders Straight ', 'quantity': '26'},{'size':'3"','name':'2m 1/4" Round bar', 'quantity':'43'},{'size':'5','name':'2m 1/8" Round bar', 'quantity':'4'}]
Next step I have to prepare the list for jQuery, so I replace like this so its in the correct syntax for json.
mat_list = manufactured_part.material_list.replace(“‘”,'”‘)
Then I have this list:
[{"pk": "91", "size": "", "name": "Thread Flat For BF", "quantity": "2"}, {"pk": "90", "size": "", "name": "Blade Holders Straight ", "quantity": "26"},{"size':"3"","name':"2m 1/4" Round bar", "quantity":"43"},{"size":"5","name":"2m 1/8" Round bar", "quantity":"4"}]
So now the list is sent to the template and I loop through it with jquery, but the list is broken because of the ” in the strings.
SO…I need to escape those ” for the list to work, otherwise it has an obvious syntax error.
Hope this makes sense now.
Thanks
You need to escape your backslash in the replace in order to get it printed. Try
replace('"','\"')
There’s no need to do it the hard way. Let Django serialize the query set for you.
I had same problem, I used a python inbuilt escaping method.
something like this helped me
[{"pk":"1","name":"John","size":"1/4" "},{},{},etc]
Ref:-
http://docs.python.org/2/reference/lexical_analysis.html#string-literals
You say:
I have to prepare the list for jQuery
So I assume you are trying to output Python objects in string form into a template file, transformed so that the output string is valid Javascript code.
This is equivalent to serializing them as JSON.
This is a solved problem, instead of replacing single quotes with double quotes etc yourself just do this:
import json
my_python_data = [{'pk': '91', 'size': '', 'name': 'Thread Flat For BF', 'quantity': '2'}, {'pk': '90', 'size': '', 'name': 'Blade Holders Straight ', 'quantity': '26'},{'size':'3"','name':'2m 1/4" Round bar', 'quantity':'43'},{'size':'5','name':'2m 1/8" Round bar', 'quantity':'4'}]
str_to_output_in_js_template = json.dumps(my_python_data)
This will handle all the escaping for you and ensure that the result is a valid Javascript object.
Using
shlex.quote("string")
or
pipes.quote("string")
Depending on the python version worked for me.
You can check here more details
https://github.com/python/cpython/blob/master/Lib/shlex.py#L281