I have a geoservice that get some text stored from a table in order to return a json string to a javascript client. However, the arcpy.SetParameter() seems to have problem to returns the escaped new lines character (\\n) my_dict = { "key1" : "test is a string with\nsome escaped characters\nsuch newlines" } my_json = json . dumps ( my_dict ) print ( my_json ) >>> '{"key1": "test is a string with\\nsome escaped characters\\nsuch newlines"}' arcpy . SetParameter ( 0 , my_json ) in the javascript console the response is the following which is not a valid json: { "key1" : "test is a string with some escaped characters such newlines" } Is there a solution?

Thank you, but the aim is to keep the the newlines. Removing it is not wanted.

I'm late to this, but if the goal is to simply remove the escaped chars, try: re.sub(r"\s", " ", my_dict['key1']) >> 'test is a string with some escaped characters such newlines' From the comment: string - Python - Why does str.strip() automatically removes all the escape characters? - Stack Overflow

FYI: this still produces the OP's result.

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arcpy.SetParameter() - Problem passing escaped string as geoprocessing service output

MaximeDemers

I have a geoservice that get some text stored from a table in order to return a json string to a javascript client. However, the arcpy.SetParameter() seems to have problem to returns the escaped new lines character (\\n)

<SPAN class="">my_dict </SPAN><SPAN class="">=</SPAN><SPAN class=""> </SPAN><SPAN class="">{</SPAN><SPAN class="">"key1"</SPAN><SPAN class=""> </SPAN><SPAN class="">:</SPAN><SPAN class=""> </SPAN><SPAN class="">"test is a string with\nsome escaped characters\nsuch newlines"</SPAN><SPAN class="">}</SPAN><SPAN class=""> 
my_json </SPAN><SPAN class="">=</SPAN><SPAN class=""> json</SPAN><SPAN class="">.</SPAN><SPAN class="">dumps</SPAN><SPAN class="">(</SPAN><SPAN class="">my_dict</SPAN><SPAN class="">)
</SPAN><SPAN class=""></SPAN><SPAN class="">print</SPAN><SPAN class="">(</SPAN><SPAN class="">my_json</SPAN><SPAN class="">)
</SPAN><SPAN class=""></SPAN><SPAN class="">>>></SPAN><SPAN class=""> </SPAN><SPAN class="">'{"key1": "test is a string with\\nsome escaped characters\\nsuch newlines"}'

</SPAN><SPAN class="">arcpy</SPAN><SPAN class="">.</SPAN><SPAN class="">SetParameter</SPAN><SPAN class="">(</SPAN><SPAN class="">0</SPAN><SPAN class="">,</SPAN><SPAN class=""> my_json</SPAN><SPAN class="">)</SPAN>

in the javascript console the response is the following which is not a valid json:

<SPAN class="">{</SPAN><SPAN class="">"key1"</SPAN><SPAN class=""> </SPAN><SPAN class="">:</SPAN><SPAN class=""> </SPAN><SPAN class="">"test is a string with
some escaped characters
such newlines"</SPAN><SPAN class="">}

</SPAN>

Is there a solution?

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DanPatterson_Retired

>>> import json
>>> dir(json)
['JSONDecodeError', 'JSONDecoder', 'JSONEncoder', '__all__', '__author__', 
'__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', 
'__package__', '__path__', '__spec__', '__version__', '_default_decoder', 
'_default_encoder', 'decoder', 'dump', 'dumps', 'encoder', 'load', 'loads',
 'scanner']

>>> # above in python 3.5
>>> 
>>> # now over to old-school
>>> import json
>>> dir(json)
['JSONDecoder', 'JSONEncoder', '__all__', '__author__', '__builtins__', 
'__doc__', '__file__', '__name__', '__package__', '__path__', '__version__', 
'_default_decoder', '_default_encoder', 'decoder', 'dump', 'dumps', 'encoder',
 'load', 'loads', 'scanner']
>>> # above in python 2.7
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

MaximeDemers

Using raw strings does not help.

<SPAN class="">{</SPAN><SPAN class="">"key1"</SPAN><SPAN class=""> </SPAN><SPAN class="">:</SPAN><SPAN class=""> </SPAN><SPAN class="">"test is a string with
some escaped characters
such newlines"</SPAN><SPAN class="">}</SPAN><CODE><SPAN class="">my_dict </SPAN><SPAN class="">=</SPAN><SPAN class=""> </SPAN><SPAN class="">{</SPAN><SPAN class="">"key1"</SPAN><SPAN class=""> </SPAN><SPAN class="">:</SPAN><SPAN class=""> r</SPAN><SPAN class="">"test is a string with\nsome escaped characters\nsuch newlines"</SPAN><SPAN class="">}</SPAN><SPAN class=""> 
my_json </SPAN><SPAN class="">=</SPAN><SPAN class=""> json</SPAN><SPAN class="">.</SPAN><SPAN class="">dumps</SPAN><SPAN class="">(</SPAN><SPAN class="">my_dict</SPAN><SPAN class="">)
</SPAN><SPAN class=""></SPAN><SPAN class="">print</SPAN><SPAN class="">(</SPAN><SPAN class="">my_json</SPAN><SPAN class="">)
</SPAN><SPAN class=""></SPAN><SPAN class="">>>></SPAN><SPAN class=""> </SPAN><SPAN class="">'{"key1": "test is a string with\\\\nsome escaped characters\\\\nsuch newlines"}'

</SPAN><SPAN class="">arcpy</SPAN><SPAN class="">.</SPAN><SPAN class="">SetParameter</SPAN><SPAN class="">(</SPAN><SPAN class="">0</SPAN><SPAN class="">,</SPAN><SPAN class=""> my_json</SPAN><SPAN class="">)


Same problem with the json in the javascript console:
</SPAN>

<SPAN class=""><BR /></SPAN>

JoshuaBixby

Did you try raw formatting the string like Dan suggested? If so, what were the results?

DanPatterson_Retired

Well I can't figure it out... so it either something we are missing or something wrong.

MaximeDemers

Hi Dan,

It seems its an issue with the SetParameter(). I can't find any solution for this case. Is this should be reported to Esri support?

DanPatterson_Retired

does the parameter that you are setting normally accept multiline input? perhaps setparameter removes what isn't needed or required

raw formatting doesn't work either I suspect either

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