IPython.notebook.kernel.execute() won't let me assign js UTF-8 strings

[Harris Joseph]

To avoid collisions on the server's filesystem, I am trying to upload csv files as strings directly into the python kernel using javascript and kernel.execute() after converting it to UTF-8 with FileReader.readAsText().result. I have tested the javascript function and it consistently prints the entire file to the console if I put a console.log() inside the callback function where I call kernel.execute() and send it the same variable outputString that gets built into  var command = "dataString ='"+outputString+"'"; before being passed to kernel.execute. I was doing this all inside a magic %%HTML cell with <script> tags , but moved everything except the input div out and put the script in its own %%javascript cell. At first I thought I just needed to set a timeout to make sure the file got completely converted, (I know it has a built in ready check i will get to that soon) but even 20s made no difference plus it still got printed in the console every time anyway. I'm not sure, but I thought Jupyter and Python 3 used UTF-8 by default, and (supposedly) that is the default, no parameter encoding that FileReader.readAsText() returns. This could also just be me being a javascript newb and missing something about the scope between the IPython.notebook.kernel and the callback function in my script inside the notebook. I have an old version with the same code here with the <script> tags, it's the same otherwise (i think). I'll post again in the morning.

Thanks and goodnight!


Harris

[Thomas Kluyver]

Hi Harris,

Can you show the code that you're running? I'm having trouble following the description.

Thomas

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[Harris Joseph]

Hi Thomas and thanks for getting back!

I actually went with a workaround where I converted the csv to a 2d javascript, shifting off the top row for keys, transposing the rest and then made a method called pythonify which converted the rows to the properly formatted strings to send and built a list of lists using notebook.kernel.execute("cols.append("+pythonify(column)+")"); in a loop. I documented it here:


https://stackoverflow.com/questions/47898609/trying-to-capture-a-csv-upload-as-string-jupyter

On Wednesday, December 20, 2017 at 5:35:43 AM UTC-5, takowl wrote:

Hi Harris,

Can you show the code that you're running? I'm having trouble following the description.

Thomas

On 20 December 2017 at 06:23, Harris Joseph <harris.j...@gmail.com> wrote:

To avoid collisions on the server's filesystem, I am trying to upload csv files as strings directly into the python kernel using javascript and kernel.execute() after converting it to UTF-8 with FileReader.readAsText().result. I have tested the javascript function and it consistently prints the entire file to the console if I put a console.log() inside the callback function where I call kernel.execute() and send it the same variable outputString that gets built into  var command = "dataString ='"+outputString+"'"; before being passed to kernel.execute. I was doing this all inside a magic %%HTML cell with <script> tags , but moved everything except the input div out and put the script in its own %%javascript cell. At first I thought I just needed to set a timeout to make sure the file got completely converted, (I know it has a built in ready check i will get to that soon) but even 20s made no difference plus it still got printed in the console every time anyway. I'm not sure, but I thought Jupyter and Python 3 used UTF-8 by default, and (supposedly) that is the default, no parameter encoding that FileReader.readAsText() returns. This could also just be me being a javascript newb and missing something about the scope between the IPython.notebook.kernel and the callback function in my script inside the notebook. I have an old version with the same code here with the <script> tags, it's the same otherwise (i think). I'll post again in the morning.

Thanks and goodnight!


Harris

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