グローバルに使用していますが、Python関数ではまだ認識されていません

Question

私は、モンスターと戦う必要があるゲームを作っていました。ここにコードとエラーがあります：

注：すべてを見ることができるように完全コードに変更しました。それはどれくらいの間、残念です。

import random 
import time 

player_level = 1 
player_HP = 4 
player_mana = 2 
player_action = "Placeholder" 

entity_list = ["Nymph", "Komodo", "Free Soul"] 
current_monster_level = player_level 
current_monster_HP = random.randrange(current_monster_level, (current_monster_level * 3) + 1) 
monster_name = entity_list[random.randrange(0, 3)] 

def spawn_monster(level): 
    import random 
    global current_monster_HP 
    global monster_name 
    current_monster_HP = random.randrange(level, level * 3) 
    monster_name = entity_list[random.randrange(0, 3)] 
    print("A ", monster_name, "attacks you!") 
    print("The ", monster_name, " has ", current_monster_HP, " HP!") 

def attack(level): 
    import random 
    global monster_name 
    global current_monster_HP 
    damage = random.randrange(level, level + 4) 
    current_monster_HP = current_monster_HP - damage 
    if damage == 0: 
     print("You missed! No damage done! ", monster_name, "'s HP is ", current_monster_HP, " !") 
    elif damage > current_monster_HP: 
     damage = current_monster_HP 
     print("You did ", damage, " damage! The ", monster_name, " was defeated!") 

    else: 
     print("You did ", damage, " damage. The enemy's HP is now ", current_monster_HP, "!") 

def spell(level): 
    global player_mana 
    global player_HP 
    player_mana = player_mana - 2 
    player_HP = player_HP + level 
    print("A spell is cast, and you gain ", level, "HP!") 

def monster_retaliate(level): 
    import random 
    global player_HP 
    global monster_name 
    global current_monster_HP 
    damage = random.randrange(level, level + 2) 
    player_HP = player_HP - damage 
    print("The ", monster_name, " attacked you, dealing ", damage, " damage!") 
    if damage == 0: 
     print("The enemy missed! No damage done! Your HP is ", player_HP, "!") 
    elif damage > current_monster_HP: 
     damage = current_monster_HP 
    else: 
     print("the ", monster_name, " did ", damage, " damage. Your HP is now ", player_HP, "!") 


print("xxxxxxxxxxxxx") 
print("xxxxxxxxxxxxx") 
print("x Blind RPG x") 
print("xxxxxxxxxxxxx") 
print("xxxxxxxxxxxxx") 
print("\n") 

begin = input("Start a new game?").lower() 

if begin == "yes": 
    print("Your tale starts when your memory does. You can't remember anything!") 
    time.sleep(1) 
    print("You wake up in an empty field, and you think you see a shadowy figure.") 
    time.sleep(1) 
    print("It slips away into the faraway trees lining the grassy field, or does it?") 
    time.sleep(1) 
    print("You stand up.") 
    time.sleep(1) 
    print("You decide to go over to where the shadow left the field.") 
    time.sleep(1) 
    print("On the ground, you see a small sword. You pick it up.") 
    time.sleep(1) 
    print("Suddenly, something jumps out at you from behind a tree.") 
    time.sleep(1) 

    spawn_monster(1) 
    while current_monster_HP > 0: 
     player_action = input("What do you do?").lower() 
     if player_action == "attack": 
      attack(player_level) 
      time.sleep(2) 
      if current_monster_HP > 0: 
       monster_retaliate(1) 
      else: 
       break 
     elif player_action == "cast spell": 
      spell(player_level) 
      time.sleep(2) 
      monster_retaliate(1) 
     else: 
      print("The enemy attacked you as you stood unmoving!") 
      monster_retaliate(1) 

     if current_monster_HP <= 0: 
      print("You win! Apparently you remember how to fight!") 
      break 

     if player_HP <= 0: 
      print("You died! If only you had remembered how to fight...") 
      break 
else: 
    print("Then why did you open the game?") 

attack()機能が働き、spell()機能の両方の仕事は、それが唯一の問題を引き起こしているmonster_retaliate()機能です。エラーコードは次のとおりです。

File "/Users/(Replacing my name for privacy)/Documents/Blind RPG.py", line 57, in monster_retaliate

player_HP = player_HP - damage NameError: name 'player_HP' is not defined

私はこれは私がglobalキーワード

Answer 1

globalが実際に変数を作成していない使用されるように見て、面白いと思いました。 という名前がとグローバルスコープで定義されていることを示し、それを割り当てるときに（ローカル変数ではなく）それを変更するだけです。アクセスしようとする前に値を与える必要があります。