AOC day 1

#!/usr/bin/env python3
#PART1
########################################
calories=[]
temp=0

with open("file.txt") as file:
    for line in file:
        if line.strip():
            temp+=int(line)
        else:
            calories.append(temp)
            temp=0
    calories.append(temp)             print(max(calories))
########################################

#PART1
########################################
maximum=None
temp=0

with open("file.txt") as file:
    for line in file:
        if line.strip():
            temp+=int(line)
        else:
            if not maximum or maximum<temp:
                maximum=temp
            temp=0
    if maximum<temp:
        maximum=temp
print(maximum)
########################################

#PART2
########################################
maximum=[0,0,0]
temp=0

with open("input.txt") as file:
    for line in file:
        if line.strip():
            temp+=int(line)
        else:
            if maximum[0]<temp:
                maximum[2]=maximum[1]
                maximum[1]=maximum[0]
                maximum[0]=temp
            elif maximum[1]<temp:
                maximum[2]=maximum[1]
                maximum[1]=temp
            elif maximum[2]<temp:
                maximum[2]=temp
            temp=0
    if maximum[0]<temp:
        maximum[2]=maximum[1]
        maximum[1]=maximum[0]
        maximum[0]=temp
print("Maximum is", (maximum[0]+maximum[1]+maximum[2]))