Variable not being assigned and called correctly

Question

I am trying to get a picture from my files to print after the user input a number for PokeID in the interactive manual. But when the number is entered it does not run into file_type. I do not know if I am calling it correctly. StackOverflow is telling me to add more details but I do not know what else to say. Why is the user input not running into the file?

from IPython.display import display, HTML, Image, clear_output
from IPython.display import Image, Audio
from ipywidgets import interact_manual
import glob
import requests
import lxml.html as lh
import pandas as pd
import matplotlib.pyplot as plt
%matplotlib inline

display(HTML("<h1> Ud's <font color= 'red'>PokeDex</font> </h1>"))
pokedexpic = "https://img.icons8.com/color/480/pokedex.png"
display(Image(url=pokedexpic, width=200))
display(Audio(filename="pokesong.mp3"))

url='http://pokemondb.net/pokedex/all'

website = requests.get(url)
doc = lh.fromstring(website.content)

tr_elements = doc.xpath('//tr')

col=[]
i=0

for t in tr_elements[0]:
    i+=1
    name=t.text_content()
    col.append((name,[]))

for j in range(1,len(tr_elements)):
    T=tr_elements[j]
    
    if len(T)!=10:
        break
    
    i=0
    
    for t in T.iterchildren():
        data=t.text_content() 
        if i>0:
            try:
                data=int(data)
            except:
                pass
        col[i][1].append(data)
        i+=1
        
Dict={title:column for (title,column) in col}
df=pd.DataFrame(Dict)

src_path = "/home/jovyan/library/ist256/spring2022/lessons/Project/PokeImages/"
no_of_image_to_show = 1 

@interact_manual(Pokemon = df['Name'])
def main(Pokemon):
    print(df[  df['Name'] == Pokemon ])

    @interact_manual(PokeID = "") #PokeID wont run into file_type to print png
    def main(PokeID):
        file_type = f"{PokeID}.png"  
        
def display_n_images(src_path, file_type, no_of_image_to_show):
    image_folder = glob.glob(src_path + file_type)
    image_folder = image_folder[0:no_of_image_to_show]

    for a_image in image_folder:
        display(Image(filename=a_image))
        print(a_image)
        
display_n_images(src_path, file_type, no_of_image_to_show)

Answer 1

That's right, you are interacting with file_type incorrectly. You refer to it outside of the inner function main, where this variable is defined as local. The minimum change required for your code to work is to declare file_type as a global variable.

...

@interact_manual(Pokemon = df['Name'])
def main(Pokemon):
    display(df[  df['Name'] == Pokemon ])

    @interact_manual(PokeID = "") 
    def main(PokeID):
        global file_type     # make file_type available globally
        file_type = f"{PokeID}.png" 
        print(file_type)
...