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.py修改数据.py

+# 修改小强的数据为11本，以及小兰的数据'小兰：12本'修改为14本，最后读取修改后的数据
+# 修改小强的数据为11本，以及小兰的数据'小兰：12本'修改为14本，最后读取修改后的数据
+new_data=''
+with open(r'C:\Users\CM\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本'in data:
+            data=data.replace('小强：10本','小强：11本')
+        new_data +=data
+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r'C:\Users\CM\Desktop\book.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)

修改角色属性.py

+class Hero:
+class Hero:
+    def __init__(self, name, hp, attack):
+        self.level = 1 
+        self.name = name      # name:名字
+        self.hp= hp     
+        self.attack= attack     # attack：攻击
+
+def upgrade():
+    yase.level=yase.level+1
+    yase.hp=yase.hp+50
+    yase.attack=yase.attack+4
+
+yase = Hero("垭瑟",300,20)
+print("垭瑟的初始血量值为：",yase.hp)
+upgrade()
+upgrade()
+print("升级2次后，垭瑟的血量值为：",yase.hp)
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写入捐赠明细.py

+
+
+file1= open(r'C:\\Users\Administrator\Desktop\text.txt','w',encoding='utf-8')
+# 写入数据
+file1.write('小兰：12本\n')
+file1.write('小丽：11本\n')
+file1.write('李文：9本\n')
+file1.write('张伟：16本\n')
+# 关闭文件
+file1.close()
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创建英雄类.py

+class Hero:
+class Hero:
+    def __init__(self):
+        self.level = 1 
+        self.hp= 300     
+        self.attack= 20     # attack：攻击
+
+yase = Hero()
+print("yase的血量值为：",yase.hp)
+print("yase的攻击力为：",yase.attack)
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自定义角色.py

+class Hero:
+class Hero:
+    def __init__(self, name, hp, attack):
+        self.level = 1 
+        self.name = name      # name:名字
+        self.hp= hp     
+        self.attack= attack     # attack：攻击
+
+yase = Hero("垭瑟",300,20)
+houyi = Hero("后羿",240,23)
+print("垭瑟的血量为：",yase.hp)
+print("后羿的血量为：",houyi.hp)
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英雄升级.py

+class Hero:
+class Hero:
+    def __init__(self, name, hp, attack):
+        self.level = 1
+        self.name = name      # name:名字
+        self.hp= hp
+        self.attack= attack     # attack：攻击
+        
+    def upgrade(self):
+        self.level=self.level+1
+        self.hp = self.hp + 50
+        self.attack = self.attack + 4
+
+houyi = Hero("后羿",240,23)
+houyi.upgrade()
+print("等级为：",houyi.level)
+print("血量为：",houyi.hp)
+print("攻击力为：",houyi.attack)
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追加数据.py

+# 补充捐赠明细，两种写法：
+# 补充捐赠明细，两种写法：
+
+# 补充数据的第一种写法：
+file= open(r'C:\Users\CM\Desktop\book.txt','a',encoding='utf-8')
+file.write('小强：10本\n') 
+file.write('李明：15本\n')
+file.close()
+
+# 补充数据的第二种写法：
+with open(r'C:\Users\CM\Desktop\book.txt','a',encoding='utf-8') as file:
+    file.write('小强：10本\n') 
+    file.write('李明：15本\n')
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遍历查找数据.py

+# 完成修改数据前的遍历和条件判断，找下'小强：10本'在不在数据中，以及小兰的数据'小兰：12本'在不在
+# 完成修改数据前的遍历和条件判断，找下'小强：10本'在不在数据中，以及小兰的数据'小兰：12本'在不在
+with open(r'C:\Users\Administrator\Desktop\text.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            print('小强数据在文件中')
+        if '小兰：12本'in data:
+            print('小兰数据在文件中')
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