Python program help, indentation issues

i have an input.txt and output.txt file and i think my indentations are screwed up for the program below. thank you for the help

input.txt

4 1 8 3 9

5 7 2 4 9 4

code:

# Function to do insertion sort

def insertionSort(arr):

# Traverse through 1 to len(arr)

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

key = arr[i]

# Move elements of arr[0..i-1], that are

# greater than key, to one position ahead

# of their current position

j = i-1

while j >=0 and key

arr[j+1] = arr[j]

j -= 1

arr[j+1] = key

# Driver code to test above

def main():

arr = list() #Creating array list to store the number read from file

f=open("data.txt","r");

o=open("insert.txt","w");

list1=f.readline().split();

list2=f.readline().split();

l1=[]

l2=[]

for val in list1:

l1.append(int(val))

del l1[0]

print("Insert Sort");

l1=insertionSort(l1)

#print(insertionSort(l1))

insertionSort(l1)

#insertionSort(l1)

print(l1)

o.write(str(l1) + ' ')

for val in list2:

l2.append(int(val))

del l2[0]

l2=insertertionSort(l2)

print (l2)

o.write(str(l2) + ' ')

f.close()

o.close()

main()

main.pyE saved # Function to do insertion sort 2 def insertionsort (arr): through 1 to len(arr) # Traverse for i in range(1, len(arr)): # Move elements of arr[e.. i-1], that are # greater than key, to one position ahead # of their current position 1e 12 13 14 15 16 17 18 # Driver code to test above 19 2e def main): 21 while j e and key