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Notebook in VSCode displays no output for some stored variables

Consider the following code:
import pandas as pd
import os
csv = """Country,Total Cases,New Cases,Total Deaths,New Deaths,Recovered,Serious
China,74187,1751,2006,138,14796,12017
Diamond Princess,621,79,,,17,20
Singapore,81,,,,29,4
Japan,80,6,1,,20,4
Hong Kong,63,1,2,1,5,6
S. Korea,51,20,,,16,
Thailand,35,,,,17,2
USA,29,,,,3,
Taiwan,23,1,1,,2,
Malaysia,22,,,,15,
Vietnam,16,,,,14,
Germany,16,,,,9,
Australia,15,,,,10,
France,12,,1,,7,
Macao,10,,,,5,
U.A.E.,9,,,,3,1
U.K.,9,,,,8,
Canada,8,,,,1,
Philippines,3,,1,,2,
Italy,3,,,,,2
India,3,,,,3,
Russia,2,,,,2,
Spain,2,,,,2,
Nepal,1,,,,1,
Belgium,1,,,,1,
Sri Lanka,1,,,,1,
Finland,1,,,,1,
Egypt,1,,,,,
Cambodia,1,,,,1,
Sweden,1,,,,,"""
with open("data/covid.csv", "w") as file:
file.write(csv)
df = pd.read_csv("data/covid.csv").fillna(0).astype(dtype = int, errors='ignore')\
.sort_values(by='Total Cases', ascending=False)
latest = df.to_dict('list')
some_var = latest.keys()
print(latest.keys()) # It's a notebook. Printing or calling a variable does not matter.
latest.keys()
Please see the attached image to see the issue
It works in a jupyter notebook on conda and if I run it via a normal python file. Which highlights that the issue lies with how VSCode displays notebook outputs
As you can see, VSCode does not display some outputs after running a cell, but does display others after running a cell.
If I try this in a conda environment, it works just fine:
Any suggestions for why this issue only happens in VSCode & How I might go about fixing it? Is it a kernel thing?

This issue was caused by an extension within vscode called Leaflet Map.
It changed the default renderer for notebook cells in vscode.
If anyone else has issues with VSCode outputs in future, you can click the elipsis on the output cell -> Click Change Presentation & ensure you're using an up to date renderer:

has anyone tried to add polylines on a folium map displayed on streamlit?

I tried to display bus lines on a map (on streamlit) using folium.Polylines,
but I keep getting the same error message :
ValueError: could not convert string to float
here's my code:
trajet_bus_fields = data
mapish= folium.Map(location = [48.083328, -1.68333])
for index, row in trajet_bus_fields.iterrows():
popup = row['idligne']
my_PolyLine=folium.PolyLine(locations=row["coordinates_reversed"],weight=3, popup = popup, color= "red")
mapish.add_child(my_PolyLine)
folium_static(mapish)
there is a step before this code that i used to invert the coordinates :
trajet_bus_fields["coordinates_reversed"]=np.empty((len(trajet_bus_fields), 0)).tolist()
here is a link to the .JSON File I used, that, of course I converted to .csv beforehand on google colab. (then i Dowloaded it to visual code where i'm launching streamlit)
[1]:https://github.com/HOUDZZZ/project3/blob/7c2336a1537cbfe4d1d96852871b79ee388feba9/parcours-des-lignes-de-bus-du-reseau-star.json
As I said i Keep getting the same message Error although it works on Google colab.
Here is also a link to my Colab if it helps:
[2]: https://colab.research.google.com/drive/1EWgKH-2S5HobWB-_Cex8aRjOC2PLR6dM?usp=sharing
Your Help will be very much appreciated, I looked for hours before posting my question

Using rpy2 in jupyter notebook but there is no output. Error in withVisible({ : object 'returns' not found

the screenshot for jupyternotebook
I've successfully installed ryp2 using wheel. I'm using Python 3.7.6 and rpy2 2.9.5.
I can get the output from jupter notebook when running python code but it doesn't work when using R magic. I tried to see if I can really use R by installing 'ggplot2' and it worked with installation bar poped out.
However, I cannot get any output when I use R magic.
Errors will come out like this. The error is so weird Error in withVisible({ : object 'returns' not found. returns is a python dataframe and was not converted to r object.
Error in withVisible({
Other error like below. Error in eval(predvars, data, env) : object 'p' not found. Neither p nor q is initialized.
Error in eval(predvars, data, env)
Anyone encountered the same problem?
Thank you very much in advance!
FYI:
packages version

This is only a partial answer; I do not know why you cannot see output of 1 for:
%%R
a = 1
a
but I know that the "errors" you see are there because the variables are indeed not defined - you still need to tell rpy2 to import (-i for input) or export (-o for output) variables between R and Python namespaces, this does not happen automatically (if it did you would end up with each object taking up twice as much space!). This is done using:
%R -i variable_to_import_from_python
And
%R -o variable_to_export_to_python
(or equivalently using %%R). It means that in your examples in order to Python print(a) you first need to:
%%R -o a
a = 1
a
And to have Python variable b, say b = 1 in R you would need to:
%%R -i b
cat(b)
Please read the documentation for using rpy2 in notebooks (magics are covered near the end) and the documentation of RMagic, as it is already explained in there.
I hope you will get an answer on the non-functioning R output soon. If you do not get one in the next few days please consider opening a bug report on rpy2 GitHub.

Tensorboard can not find the timestamp of the event

I can open the website which tensorboard shows me, but there is no data in it, and the cmd says that it can not find the first timestamp of the event.
I type something like this
./tensorboard --logdir=G:/final/log_1
I try many times on win7 and win10 and I am sure that the path is right, but there are no data in that website.
Part of my code
with tf.name_scope('input_layer'):
xs = tf.placeholder(tf.float32, [1, 9],name="x_input")
ys = tf.placeholder(tf.float32, [1, 1],name="y_input")
My code for creating the event file, it will create a file named log_1, and the event files will be in that file
writer = tf.summary.FileWriter(r'log_1/',sess.graph)
writer.close()
I expect the website can show me the graph, however, it showed nothing

1) Firstly, if you are running it on an editor like Jupyter try restarting the kernel.
2) Secondly, I don't know your whole code but one thing you have to do is
merged = tf.summary.merge_all()
summary = sess.run(merged)
writer.add_summary(summary, index)
One problem with your code can be that you are creating all the summary variables but you are not actually adding it to the writer. So before you close it use the above add_summary function. I had the same problem recently and all of the above solved it.

Print Variable In Jupyter Notebook Markdown Cell Python

Can I print the value of a variable in Markdown Cell Jupyter Notebook?
Tried Code:
value = 5.3
Markdown cell --> Value is {{ value }}
I want that the Markdown cell should display the value of variable
SCREENSHOT

#nilansh bansal's answer works great for Jupyter Notebooks. Unfortunately, it doesn't work for JupyterLab because the plugin is no longer supported (as is the case for all nbextension plugins). Since JupyterLab gains popularity, I wanted to complement the answers so far because it took me quite some time to find a solution. This is because until now there is no plugin compatible with JupyterLab. I have found the following solution for myself by combining this and this SO answers:
from IPython.display import Markdown as md
# Instead of setting the cell to Markdown, create Markdown from withnin a code cell!
# We can just use python variable replacement syntax to make the text dynamic
n = 10
md("The data consists of {} observations. Bla, Bla, ....".format(n))
Alternatively, the last line can be simplified as suggested by #Igor Fobia for Python >3.6:
md(f"The data consists of {n} observations. Bla, Bla, ....")
This leads to the desired output. However, it has the huge disadvantage that the code cell will still be visible when exporting the NB. This can be solved though:
Add a tag to the code cell, i.e. name it "hide"
Configure nbconvert to ignore the tagged cells, e.g. by adding this c.TagRemovePreprocessor.remove_input_tags = {"hide"} to your ~/.jupyter/jupyter_notebook_config.py config file
I have written a detailed blog-post about how I implemented this solution for publishing Notebooks on my blog. If you use JupyterLab < 2.0, you could install the jupyterlab-celltags plugin for JupyterLab to simplify the cell tagging.

So After going through all the links I was able to resolve the problem by referring to nbextension jupyter notebook docs : https://github.com/ipython-contrib/jupyter_contrib_nbextensions
Steps Taken:
pip install jupyter_contrib_nbextensions
jupyter contrib nbextension install --user
jupyter nbextension enable python-markdown/main
After the above commands started a jupyter notebook and to print the value of a variable in the markdown cells works like charm!
You just have to use {{ ac_score }} within a markdown cell.
Screenshot
Thanks!

You can overwrite %%markdown IPython magic to substitute variables from the global environment:
from IPython.display import Markdown
from IPython.core.magic import register_cell_magic
#register_cell_magic
def markdown(line, cell):
return Markdown(cell.format(**globals()))
This has the advantage of allowing for Markdown linting when used with JupyterLab-LSP.
If developing a documentation with nbsphinx you can hide the input (source of the cell) by setting {"hide_input": true} in cell metadata:
(note the Jupyter[Lab] and LSP underlined as those are not in the English dictionary - linting works!)
which results in smooth docs like this:
For a better experience when in JupyterLab you can always collapse the input cell by clicking on the blue bar to the left of it (visible when you hover over the cell).