调用函数两次或更多次并获取TypeError'int'是不可调用的

Question

我需要一些函数的帮助，第一次调用它时，它运行得很好，但是在后续运行if / else语句时它会给出TypeError'int'不可调用。为了看到这个，当给出选项使用Hunt时，然后在第二次运行时再次使用Hunt。我使用的是Python 2.7，代码是： -

from sys import exit
import random

equipment = ['Bolter', 'Bolt Pistol', 'Combat Knife']

print "Your ship has crash landed on an unknown planetoid, what do you do? 
Explore, Overwatch, Hunt or Nothing"

def enemy_attack():
enemy_attack = random.randrange(0, 7)
if enemy_attack <= 5:
    print "Enemy Misses"
    print "Your Turn"
    you_attack()
elif enemy_attack == 6:
    print "Enemy kills you"
else:
    print "Enemy ran away"

def you_attack():
you_attack = random.randrange(0, 7)
if you_attack <= 2:
    print "You missed"
    print "Thier Turn"
    enemy_attack()
else:
    print "You killed the enemy"
    print "What do you do? Explore, Overwatch, Hunt, or Nothing"

    do = raw_input("> ")

    if "Explore" in do:
        print "You find a sealed container"
        print "Your Equipment is", equipment
        print "Do you want to open the container? Yes or No"
        container = raw_input("> ")
        if "Yes" in container:
            open_container()
        else:
            print "You left it alone"
    elif "Overwatch" in do: 
        print "Orks Attack!!!" 
        enemy_attack()
    elif "Hunt" in do:
        print "You attack the Orks!"
        you_attack()
    else:
        print "The planetoid swallows you whole, and adds your mass to it!!"
        exit(0)

def open_container():
open_container = random.randrange(0,5)
if open_container == 0:
    print "You have found a Plasma Gun!"
    equipment.append('Plasma Gun')
    print "Your equipment is now", equipment
elif open_container == 1:
    print "You have found a Chainsword!"
    equipment.append('Chainsword')
    print "Your equipment is now", equipment
elif open_container == 2:
    print "You have found a Power Sword"
    equipment.append('Power Sword')
    print "Your equipment is now", equipment
else:
    print "There is nothing here for you!!"


do = raw_input("> ")

if "Explore" in do:
print "You find a sealed container"
print "Your Equipment is", equipment
print "Do you want to open the container? Yes or No"
container = raw_input("> ")
    if "Yes" in container:
        open_container()
    else:
        print "You left it alone"  
elif "Overwatch" in do: 
    print "Orks Attack!!!" 
    enemy_attack()
elif "Hunt" in do:
    print "You attack the Orks"
    you_attack()
else:
    print "The planetoid swallows you whole, and adds your mass to it!!"
exit(0)