爲什麼我的變量沒有被定義？

Question

# players stats and elements 
player_health = 100 
player_attack.earth = 20 
player_attack.air =10 
player_attack.fire = 15 
player_attack.water = 12 
ogre_health = 75 
ogre_attack = 15 

# main code 
player_name = input('What is your name, Guardian? ') 

print('Hello ' + player_name + ' the Guardian') 

player_element = input('Would you like to be the Guardian of Air, Earth, Fire or Water? ') 

if player_element == 'Air': 
    print('You have been granted the powers of the Air, Guardian.\ 
You now have the powers of the Wind and Sky.') 

if player_element == 'Earth': 
    print('You have been granted the powers of the Earth, Guardian.\ 
You now have the powers of the Earth.') 

if player_element == 'Fire': 
    print('You have been granted the powers of Fire, Guardian.\ 
You now have the powers of Fire. Do not destroy as you wish.') 

if player_element == 'Water': 
    print('You have been granted the powers of Water, Guardian.\ 
You now have the powers to control the oceans and water.') 

print('There is an enemy in the distance! What do you do?') 

player_action = input('What do you do ' + player_name + '? ' + 'Type A to attack ') 
if player_action == 'A': 
    enemy_health = enemy_health - power 

print('The enemy\'s health is at ' + str(enemy_health) + ' Keep attacking!') 

player_action = input('What do you do ' + player_name + '? ' + 'Type A to attack ') 
if player_action == 'A': 

    if player_element == 'Water': 
     ogre_health = ogre_health - player_attack.water 

print('The enemy\'s health is at ' + str(ogre_health) + ' Keep attacking!') 

這是我的代碼。 它給我的錯誤cannot define player_attack.earth 爲什麼？我定義了它。這裏有什麼問題？ 我正在使用python 3.4.3

Answer 1

答案很簡單，因爲變量名不能有'。'在裏面。這將指向一個類中的屬性。

您在此處找到有關允許的字符和命名規則的詳情：https://docs.python.org/2/reference/lexical_analysis.html#identifiers