This is not plotting please help

import matplotlib.pyplot as plt

import time

# Insertion Sort

def insertion$\_$sort$($arr$)$:

comparisons $=0$

for i in range$(1,$ len$($arr$))$:

key $=$ arr$[$i$]$

j $=$ i$-1$

while j $>=0$ and key $<$ arr$[$j$]$ :

arr$[$j $+1]=$ arr$[$j$]$

j $-=1$

comparisons $+=1$

arr$[$j $+1]=$ key

return comparisons

# Merge Sort

comparisons $=0$

def merge$\_$sort$($arr$)$:

global comparisons

if len$($arr$)>1$:

mid $=$ len$($arr$)//2$

L $=$ arr$[$:mid$]$

R $=$ arr$[$mid:$]$

merge$\_$sort$($L$)$

merge$\_$sort$($R$)$

i $=$ j $=$ k $=0$

while i $<$ len$($L$)$ and j $<$ len$($R$)$:

comparisons $+=1$

if L$[$i$]<$ R$[$j$]$:

arr$[$k$]=$ L$[$i$]$

i $+=1$

else:

arr$[$k$]=$ R$[$j$]$

j $+=1$

k $+=1$

while i $<$ len$($L$)$:

arr$[$k$]=$ L$[$i$]$

i $+=1$

k $+=1$

while j $<$ len$($R$)$:

arr$[$k$]=$ R$[$j$]$

j $+=1$

k $+=1$

return comparisons

fileNames $=["$rand$1000.$txt$"]$

execution$\_$times$\_$insertion $=[]$

execution$\_$times$\_$merge $=[]$

n$\_$comparisons$\_$insertion $=[]$

n$\_$comparisons$\_$merge $=[]$

sizes $=[]$

for name in fileNames:

with open$($name$,\text{'}$r$\text{'})$ as f:

arr $=[$int$($num$)$ for line in f for num in line.split$()]$

sizes.append$($len$($arr$))$ # Store the size of the dataset

arr$\_$copy $=$ arr.copy$()$

# Measure execution time and number of comparisons for insertion sort

start$\_$time $=$ time.time$()$

comparisons $=$ insertion$\_$sort$($arr$)$

end$\_$time $=$ time.time$()$

execution$\_$times$\_$insertion.append$($end$\_$time $-$ start$\_$time$)$

n$\_$comparisons$\_$insertion.append$($comparisons$)$

# Measure execution time and number of comparisons for merge sort

start$\_$time $=$ time.time$()$

comparisons $=$ merge$\_$sort$($arr$\_$copy$)$

end$\_$time $=$ time.time$()$

execution$\_$times$\_$merge.append$($end$\_$time $-$ start$\_$time$)$

n$\_$comparisons$\_$merge.append$($comparisons$)$

# Plotting the results

plt$.$figure$($figsize$=(12,6))$

plt$.$plot$($sizes$,$ execution$\_$times$\_$insertion, label$=$'Insertion Sort Execution Time'$)$

plt$.$plot$($sizes$,$ execution$\_$times$\_$merge, label$=$'Merge Sort Execution Time'$)$

plt$.$xlabel$(\text{'}$Dataset Size'$)$

plt$.$ylabel$(\text{'}$Execution Time $($seconds$)\text{'})$

plt$.$title$(\text{'}$Execution Time vs Dataset Size'$)$

plt$.$legend$()$

plt$.$show$()$