diff --git a/base/alien.py b/base/alien.py
new file mode 100644
index 0000000000000000000000000000000000000000..c118a68f957a1c000ebd914604a99b11cfeb2a8d
--- /dev/null
+++ b/base/alien.py
@@ -0,0 +1,26 @@
+alien_0 = {'color': 'green', 'points': 5}
+print(alien_0)
+print(alien_0['color'])
+print(alien_0['points'])
+
+alien_0 = {'color': 'green', 'points': 5}
+print(alien_0)
+alien_0['x_position'] = 0
+alien_0['y_position'] = 25
+print(alien_0)
+
+
+alien_0 = {}
+alien_0['color'] = 'grenn'
+alien_0['points'] = 5
+print(alien_0)
+
+alien_0 = {'color': 'green', 'points': 5}
+print(alien_0)
+alien_0['color'] = 'yellow'
+print(alien_0)
+
+alien_0 = {'color': 'green', 'points': 5}
+print(alien_0)
+del alien_0['color']
+print(alien_0)
\ No newline at end of file
diff --git a/base/aliens.py b/base/aliens.py
new file mode 100644
index 0000000000000000000000000000000000000000..8acd749266e1aafecf62294ad4aa359bedfa7698
--- /dev/null
+++ b/base/aliens.py
@@ -0,0 +1,8 @@
+alien_0 = {'color': 'green', 'points': 5}
+alien_1 = {'color': 'red', 'points': 10}
+alien_2 = {'color': 'yellow', 'points': 15}
+
+aliens = [alien_0, alien_1, alien_2]
+
+for alien in aliens:
+    print(alien)
diff --git a/base/apostrophe.py b/base/apostrophe.py
index fab7cf028de2eecd49c6a79550de8f9cf8ad29ea..cfc9578403aa34a0040781faa3c27d21cc8ce043 100644
--- a/base/apostrophe.py
+++ b/base/apostrophe.py
@@ -1,3 +1,3 @@
 message = "Python's"
 print(message)
-message = 'Python's'
\ No newline at end of file
+message = 'Python'
\ No newline at end of file
diff --git a/base/bicycles.py b/base/bicycles.py
index 3725579e0851e4a6250d5cb80ad9b9342407f8ee..b59d7e249d681f340c709a4d5118eb69e7106d38 100644
--- a/base/bicycles.py
+++ b/base/bicycles.py
@@ -7,54 +7,84 @@ print(bicycles[0].title())
 print(bicycles[-1])
 
 # 修改列表中的元素
+print("修改之前：")
+print(bicycles)
 bicycles[1] = 'jerry2'
+print("修改之后：")
 print(bicycles)
 
 # 添加元素
 # 末尾添加
+bicycles = ['tom', 'jerry', 'jerry5', 'xiaohong', 'jerry5', 'xiaoming']
+print("末尾添加之前：")
+print(bicycles)
 bicycles.append('xiaoqiang')
+print("末尾添加之后：")
 print(bicycles)
 # 插入元素
 bicycles.insert(0, 'tiger')
+print("插入添加之后：")
 print(bicycles)
 
 # 删除元素
 # del 语句
+bicycles = ['tom', 'jerry', 'jerry5', 'xiaohong', 'jerry5', 'xiaoming']
+print("末尾添加之前：")
+print(bicycles)
 del bicycles[0]
+print("删除元素之后：")
 print(bicycles)
 # pop() 弹出列表最后的元素
 pop_val = bicycles.pop()
+print("弹出元素之后：")
 print(bicycles)
-print(pop_val)
+print("pop的元素：" + pop_val)
 # pop(0) 弹出指导位置元素
 pop_val2 = bicycles.pop(0)
+print("弹出指定位置元素之后：")
 print(bicycles)
-print(pop_val2)
+print("pop的指位置的元素：" + pop_val2)
 # remove() 根据元素的值删除元素, 只会删除列表中的第一个
 bicycles.remove('jerry5')
 print(bicycles)
-
+print("-----------------")
 # 组织列表
 # 按照字典顺序
 # sort() 永久排序, 默认正序
 cars = ['bmw', 'audi', 'toyota', 'subaru']
+print('原始列表：')
 print(cars)
 cars.sort()
+print('顺序：')
 print(cars)
 # 逆序
 cars.sort(reverse=True)
+print('逆序：')
 print(cars)
+print('---------')
 # sorted() 临时排序, 也可以使用reverse=True
+cars = ['bmw', 'audi', 'toyota', 'subaru']
+print('原始列表：')
+print(cars)
 print('临时排序后列表: ')
 print(sorted(cars))
 print("再次查看列表: ")
 print(cars)
+print('---------')
 # 倒着打印
 cars = ['bmw', 'audi', 'toyota', 'subaru']
+print('原始列表：')
+print(cars)
 cars.reverse()
+print('倒着打印列表：')
 print(cars)
 
 # len() 长度
+cars = ['bmw', 'audi', 'toyota', 'subaru']
+print('原始列表：')
+print(cars)
 print(len(cars))
 
+cars = ['bmw', 'audi', 'toyota', 'subaru']
+print(cars[4])
 
diff --git a/base/continue.py b/base/continue.py
index 36a6b45ffa4b1ef3edaffe3cc6828b62a9caeb9f..290c84361670e8fff287bad420934cd2ee6e3bb9 100644
--- a/base/continue.py
+++ b/base/continue.py
@@ -1,9 +1,8 @@
 # continue
 current_number = 0
 while current_number < 10:
-	current_number += 1
-	if current_number % 2 == 0:
-		continue
+    current_number += 1
+    if current_number % 2 == 0:
+        continue
 
-	print(current_number)
-	
\ No newline at end of file
+    print(current_number)
diff --git a/base/even_numbers.py b/base/even_numbers.py
new file mode 100644
index 0000000000000000000000000000000000000000..9737c2868f3760753246af794c11ce209fd3432d
--- /dev/null
+++ b/base/even_numbers.py
@@ -0,0 +1,2 @@
+even_numbers = list(range(2, 11, 2))
+print(even_numbers)
diff --git a/base/favorite_languages.py b/base/favorite_languages.py
index 53e0bb87ca33a4c4e3ff933bfde5971bad76066e..5995cd9930744b345b51e0e1afea12fcc78b77df 100644
--- a/base/favorite_languages.py
+++ b/base/favorite_languages.py
@@ -8,4 +8,5 @@ favorite_languages['edward'] = 'ruby'
 favorite_languages['phil'] = 'python'
 
 for name, languages in favorite_languages.items():
-	print(name.title() + "'s favorite languages is " + languages.title() + '.')
\ No newline at end of file
+	print(name.title() + "'s favorite languages is " + languages.title() + '.')
+
diff --git a/base/favorite_languages0.py b/base/favorite_languages0.py
new file mode 100644
index 0000000000000000000000000000000000000000..ae30b2901c4ca0a4f264bb176a3a8141046edeb9
--- /dev/null
+++ b/base/favorite_languages0.py
@@ -0,0 +1,49 @@
+favorite_languages = {'jen': 'python',
+                      'sarah': 'c',
+                      'edward': 'ruby',
+                      'phil': 'python'
+                      }
+
+for name, languages in favorite_languages.items():
+    print(name.title() + "'s favorite languages is " + languages.title() + '.')
+
+favorite_languages = {'jen': 'python',
+                      'sarah': 'c',
+                      'edward': 'ruby',
+                      'phil': 'python'
+                      }
+
+for name in favorite_languages.keys():
+    print(name.title())
+
+print('------')
+
+favorite_languages = {'jen': 'python',
+                      'sarah': 'c',
+                      'edward': 'ruby',
+                      'phil': 'python'
+                      }
+
+for name in sorted(favorite_languages.keys()):
+    print(name.title() + ', thank you for taking the poll.')
+
+favorite_languages = {'jen': 'python',
+                      'sarah': 'c',
+                      'edward': 'ruby',
+                      'phil': 'python'
+                      }
+
+for languages in favorite_languages.values():
+    print(languages.title())
+
+favorite_languages = {'jen': ['python', 'java'],
+                      'sarah': 'c',
+                      'edward': ['ruby', 'go'],
+                      'phil': ['python', 'c++']
+                      }
+
+for name, languages in favorite_languages.items():
+    print('\n' + name.title() + "'s favorite languages are: ")
+    for language in languages:
+        print('\t' + language.title())
+
diff --git a/base/for.py b/base/for.py
index 8c768901f71bbd1e0faabcc07befcfea5fd436e7..45a726b30eb9a9c00342999c6499d8fa1bd66c2e 100644
--- a/base/for.py
+++ b/base/for.py
@@ -3,43 +3,41 @@ names = ['name1', 'name3', 'name2']
 for name in names:
 	print(name)
 
-
 # 数值列表
 # 函数 range() 范围左闭右开
-for value in range(1,10):
+for value in range(1, 10):
 	print(value)
 
-
 # 使用range() 创建数字列表
-numbers = list(range(1,6))
+numbers = list(range(1, 6))
 print(numbers)
 
 # 创建一个数值列表, 包含1-10 的平方
 squares = []
-for value in range(1,11):
-	square = value**2
+for value in range(1, 11):
+	square = value ** 2
 	squares.append(square)
 
 print(squares)
 
 # 统计计算
-digits = [1,2,3,4,5,6,7,8,9,0]
+digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
 print(min(digits))
 print(max(digits))
 print(sum(digits))
 
 # 列表解析
 # 前面 生成列表squares需要好几行代码, 这里用下列表解析
-squares = [value**2 for value in range(1,11)]
+squares = [value ** 2 for value in range(1, 11)]
 print(squares)
 
 # 使用列表的一部分- 切片
-players = ['a','b','c','d','e','f','g']
+players = ['a', 'b', 'c', 'd', 'e', 'f', 'g']
 print(players[0:3])
 print(players[1:4])
-print(players[:4]) # 不指定, 从列头开始
-print(players[2:]) # 不指定, 到列尾
-print(players[-3:]) # 返回最后3个
+print(players[:4])  # 不指定, 从列头开始
+print(players[2:])  # 不指定, 到列尾
+print(players[-3:])  # 返回最后3个
 
 # 遍历切片
 for player in players[:3]:
@@ -61,7 +59,7 @@ dimensions = (200, 500)
 print(dimensions)
 print(dimensions[0])
 print(dimensions[1])
-# dimensions[0] = 300 不能修改, 会报错
+# dimensions[0] = 300 # 不能修改, 会报错
 # 遍历元祖
 for dimension in dimensions:
 	print(dimension)
@@ -74,4 +72,4 @@ for dimension in dimensions:
 print('modified: ')
 dimensions = (100, 200)
 for dimension in dimensions:
-	print(dimension)
\ No newline at end of file
+	print(dimension)
diff --git a/base/hello.py b/base/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..75d9766db981cf4e8c59be50ff01e574581d43fc
--- /dev/null
+++ b/base/hello.py
@@ -0,0 +1 @@
+print('hello world')
diff --git a/base/hello_world.py b/base/hello_world.py
index 16c3c89821909707e264ca18c088b07ad246aa94..0781187bfdf7bdc7be32901369f0dab1e06147ae 100644
--- a/base/hello_world.py
+++ b/base/hello_world.py
@@ -2,4 +2,4 @@ message = "hello python world!"
 print(message)
 
 message = "python 改变世界"
-print(message)
\ No newline at end of file
+print(message)
diff --git a/base/if.py b/base/if.py
index 8e7388afc533eabcc06388e52d9dc6d468552e8d..de948c1a17e9c27a76c673da819dc01d53a7387d 100644
--- a/base/if.py
+++ b/base/if.py
@@ -1,9 +1,9 @@
 cars = ['bmw', 'audi', 'toyota', 'subaru']
 for car in cars:
-	if car == 'bmw':
-		print(car.upper())
-	else:
-		print(car.title())
+    if car == 'bmw':
+        print(car.upper())
+    else:
+        print(car.title())
 
 print('--------------')
 # 检查是否相等 (区分大小写)
@@ -27,7 +27,7 @@ print('--------------')
 # and 同时成立; or 至少一个满足 
 print(age > 10 and age < 19)
 print(age > 10 or age < 19)
-print('--------------')
+print('--------------达到')
 
 # 是否包含
 # in 包含; not in 不包含
@@ -42,7 +42,7 @@ status2 = False
 # 确定列表不是空的
 cars = []
 if cars:
-	print("cars is not null")
+    print("cars is not null")
 else:
-	print("cars is null")
+    print("cars is null")
 
diff --git a/base/list_delete.py b/base/list_delete.py
new file mode 100644
index 0000000000000000000000000000000000000000..9a8adfad7de7d2364e73321f3d77a961e74220b7
--- /dev/null
+++ b/base/list_delete.py
@@ -0,0 +1,33 @@
+# del 语句
+names = ['tom', 'jerry', 'tiger', 'Davis']
+print("删除元素之前：")
+print(names)
+del names[0]
+print("删除元素之后：")
+print(names)
+
+# pop() 弹出列表最后的元素
+names = ['tom', 'jerry', 'tiger', 'Davis']
+print("弹出元素之前：")
+print(names)
+name1 = names.pop()
+print("弹出元素之后：")
+print(names)
+print("pop的元素：" + name1)
+
+# pop(0) 弹出指定位置元素
+names = ['tom', 'jerry', 'tiger', 'Davis']
+print("弹出指定位置元素之前：")
+print(names)
+name2 = names.pop(0)
+print("弹出指定位置元素之后：")
+print(names)
+print("pop的指位置的元素：" + name2)
+
+# remove(指定的元素) 根据元素的值删除元素, 只会删除列表中的第一个
+names = ['tom', 'jerry', 'tiger', 'Davis']
+print("删除指定元素之前：")
+print(names)
+names.remove('tiger')
+print("删除指定元素之后：")
+print(names)
\ No newline at end of file
diff --git a/base/magicians.py b/base/magicians.py
new file mode 100644
index 0000000000000000000000000000000000000000..d2bf92a5c35543cf78719472002d8a9d5cb5fd1c
--- /dev/null
+++ b/base/magicians.py
@@ -0,0 +1,3 @@
+magicians = ['alice', 'david', 'carolina']
+for magician in magicians:
+	print(magician)
diff --git a/base/many_users.py b/base/many_users.py
new file mode 100644
index 0000000000000000000000000000000000000000..05e368fdca9d6e38b75e6f364e9d2132fb406d8c
--- /dev/null
+++ b/base/many_users.py
@@ -0,0 +1,20 @@
+users = {
+    'user1': {
+        'first': 'xiao',
+        'last': 'ming',
+        'location': 'shanghai'
+    },
+    'user2': {
+        'first': 'hong',
+        'last': 'hong',
+        'location': 'beijing'
+    },
+}
+
+for username, user_info in users.items():
+    print('\nUsername: ' + username)
+    full_name = user_info['first'] + ' ' + user_info['last']
+    location = user_info['location']
+
+    print('\t Full name: ' + full_name.title())
+    print('\tLocation: ' + location.title())
diff --git a/base/name.py b/base/name.py
new file mode 100644
index 0000000000000000000000000000000000000000..63935abcbbe75550275c068dde77aac7b063effe
--- /dev/null
+++ b/base/name.py
@@ -0,0 +1,15 @@
+name = "ada lovelace"
+print(name.title())
+print(name.upper())
+print(name.lower())
+
+first_name = "ada"
+last_name = "lovelace"
+full_name = first_name + " " + last_name
+print(full_name)
+
+favorite_language = ' python java '
+print(favorite_language.rstrip())
+
+age = 27
+print("年龄：" + str(age))
\ No newline at end of file
diff --git a/base/numbers.py b/base/numbers.py
new file mode 100644
index 0000000000000000000000000000000000000000..4188aa06946063cda567fb163b6afb535f08ded7
--- /dev/null
+++ b/base/numbers.py
@@ -0,0 +1,5 @@
+for value in range(1, 5):
+	print(value)
+
+numbers = list(range(1, 6))
+print(numbers)
diff --git a/base/squares.py b/base/squares.py
new file mode 100644
index 0000000000000000000000000000000000000000..477b3431ffbbff77f1804819b6f770baa1901f5d
--- /dev/null
+++ b/base/squares.py
@@ -0,0 +1,13 @@
+squares = []
+for value in range(1, 11):
+	square = value ** 2
+	squares.append(square)
+
+print(squares)
+
+squares = [value**2 for value in range(1, 11)]
+print(squares)
+digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
+print(min(digits))
+print(max(digits))
+print(sum(digits))
diff --git a/base/user.py b/base/user.py
new file mode 100644
index 0000000000000000000000000000000000000000..6338096a2d6213fbbff8316f89ec8fe35b88fcee
--- /dev/null
+++ b/base/user.py
@@ -0,0 +1,10 @@
+user_0 = {
+    'username': 'wsh',
+    'first': 'wh',
+    'last': 'shanghui'
+}
+
+for key, value in user_0.items():
+    print('\nkey: ' + key)
+    print('value: ' + value)
+
diff --git a/base/while.py b/base/while.py
index 63c3ed60656fa6e761779e0d6755d5c059063436..91d7406cfa90c379e13c761e157c9d08b6240bd9 100644
--- a/base/while.py
+++ b/base/while.py
@@ -1,16 +1,15 @@
-current_number = 1
-while current_number <=5:
-	print(current_number)
-	current_number += 1
+# current_number = 1
+# while current_number <= 5:
+#     print(current_number)
+#     current_number += 1
 
 # break
-prompt = '\n请输入你喜欢的城市名称:'
-prompt += '\n输入 "quit" 退出 '
-while True:
-	city = input(prompt)
-
-	if city == 'quit':
-		break
-	else:
-		print('我喜欢去 ' + city + '!')
+prompt = '\n请输入你喜欢的城市名称（输入 "quit" 退出）: '
+active = True
+while active:
+    city = input(prompt)
 
+    if city == 'quit':
+        active = False
+    else:
+        print('我喜欢去 ' + city + '!')
diff --git "a/base/\347\254\2547\347\253\240 \347\224\250\346\210\267\350\276\223\345\205\245\345\222\214while\345\276\252\347\216\257.py" "b/base/\347\254\2547\347\253\240 \347\224\250\346\210\267\350\276\223\345\205\245\345\222\214while\345\276\252\347\216\257.py"
index 8f50859f6f6efa6a36b1d889418818aa772dae4b..3dfa2fc487d4e3a89991682262b4fcb67ecdb6b5 100644
--- "a/base/\347\254\2547\347\253\240 \347\224\250\346\210\267\350\276\223\345\205\245\345\222\214while\345\276\252\347\216\257.py"	
+++ "b/base/\347\254\2547\347\253\240 \347\224\250\346\210\267\350\276\223\345\205\245\345\222\214while\345\276\252\347\216\257.py"	
@@ -3,4 +3,4 @@ message = input("请输入你的名称: ")
 print('hello ' + message)
 age = input("请输入你的年龄: ")
 age = int(age)
-print(age)
\ No newline at end of file
+print(age)
diff --git "a/base/\347\254\2548\347\253\240 \345\207\275\346\225\260.py" "b/base/\347\254\2548\347\253\240 \345\207\275\346\225\260.py"
index 34a7f6549ec3d1b69416368b8fc81af228f81ea4..1f00cd828e55f890b986ad38fee8fc53d62f16b9 100644
--- "a/base/\347\254\2548\347\253\240 \345\207\275\346\225\260.py"	
+++ "b/base/\347\254\2548\347\253\240 \345\207\275\346\225\260.py"	
@@ -1,22 +1,22 @@
 # 定义函数
 def greet_user():
-	"""文档注释, 描述此函数的功能"""
-	print("hello")
+    """文档注释, 描述此函数的功能"""
+    print("hello")
 
 greet_user()
 
 # 向函数传递信息
 def greet_user(username):
-	"""显示简单的问候语"""
-	print("Hello, " + username.title() + "!")
+    """显示简单的问候语"""
+    print("Hello, " + username.title() + "!")
 
 greet_user('tom')
 
 
 # 位置实参
 def describe_pet(animal_type, pet_name):
-	"""显示宠物的信息"""
-	print("我的 " + animal_type + ' 的名字是 ' + pet_name)
+    """显示宠物的信息"""
+    print("我的 " + animal_type + ' 的名字是 ' + pet_name)
 
 describe_pet('狗', '小黄')
 describe_pet('猫', '小黑')
@@ -26,8 +26,8 @@ describe_pet(pet_name='小红', animal_type='鸡')
 
 # 默认值 默认值放在后面
 def describe_pet2(pet_name, animal_type='dog'):
-	"""显示宠物的信息"""
-	print("我的 " + animal_type + ' 的名字是 ' + pet_name)
+    """显示宠物的信息"""
+    print("我的 " + animal_type + ' 的名字是 ' + pet_name)
 
 describe_pet2(pet_name='小黄')
 describe_pet2('大黄')
@@ -35,14 +35,14 @@ describe_pet2('大黄2', '狗')
 
 # 默认值 默认值放在前面 SyntaxError: non-default argument follows default argument 会报错
 # def describe_pet3(animal_type='dog', pet_name):
-# 	"""显示宠物的信息"""
-# 	print("我的 " + animal_type + ' 的名字是 ' + pet_name)
+#     """显示宠物的信息"""
+#     print("我的 " + animal_type + ' 的名字是 ' + pet_name)
 
 # 返回值
 def get_formatted_name(frist_name, last_name):
-	"""返回整洁的姓名"""
-	full_name = frist_name + ' ' + last_name
-	return full_name.title()
+    """返回整洁的姓名"""
+    full_name = frist_name + ' ' + last_name
+    return full_name.title()
 
 # 函数调用
 musician = get_formatted_name('jimi', 'hendrix')
@@ -50,32 +50,32 @@ print(musician)
 
 # 返回字典
 def build_person(frist_name, last_name):
-	"""返回一个字典, 其中包含一个人的信息"""
-	person = {'first': frist_name, 'last': last_name}
-	return person
+    """返回一个字典, 其中包含一个人的信息"""
+    person = {'first': frist_name, 'last': last_name}
+    return person
 
 musician = build_person('jimi', 'hendrix')
 print(musician)
 
 # 在函数中修改列表
 def print_models(unprinted_designs, completed_models):
-	"""
-	模拟打印每个设计, 直到没有末打印的设计为止
-	打印每个设计后, 都将其移到列表completed_models中
-	"""
+    """
+    模拟打印每个设计, 直到没有末打印的设计为止
+    打印每个设计后, 都将其移到列表completed_models中
+    """
 
-	while unprinted_designs:
-		current_design = unprinted_designs.pop()
+    while unprinted_designs:
+        current_design = unprinted_designs.pop()
 
-		# 模拟根据设计制作3D打印模型的过程
-		print('打印 模型: ' + current_design)
-		completed_models.append(current_design)
+        # 模拟根据设计制作3D打印模型的过程
+        print('打印 模型: ' + current_design)
+        completed_models.append(current_design)
 
 def show_completed_models(completed_models):
-	"""显示打印好的所有模型"""
-	print('\n')
-	for completed_model in completed_models:
-		print(completed_model)
+    """显示打印好的所有模型"""
+    print('\n')
+    for completed_model in completed_models:
+        print(completed_model)
 
 unprinted_designs = ['iphone case', 'robot pendant', 'dodecahedron']
 completed_models = []
@@ -91,7 +91,7 @@ print(unprinted_designs)
 
 # 传递任意参数的实参 *toppings
 def make_pizza(*toppings):
-	print(toppings)
+    print(toppings)
 
 # 看到打印结果 看打印的结果实际上是 使用元祖来存储 任意数量的实参的
 make_pizza('peperoni')
@@ -99,21 +99,21 @@ make_pizza('mushrooms', 'green peppers', 5)
 
 # 使用位置实参和任意数量实参
 def make_pizza(size, *toppings):
-	print(size)
-	print(toppings)
+    print(size)
+    print(toppings)
 
 make_pizza(16, 'green peppers', 'mushrooms')
 
 # 使用任意数量的关键字实参
 def build_profile(first, last, **user_info):
-	"""创建一个字典,包含我们知道的有关用户的一切"""
-	profile = {}
-	profile['frist_name'] = first
-	profile['last_name'] = last
-	for key, value in user_info.items():
-		profile[key] = value
-	return profile
+    """创建一个字典,包含我们知道的有关用户的一切"""
+    profile = {}
+    profile['frist_name'] = first
+    profile['last_name'] = last
+    for key, value in user_info.items():
+        profile[key] = value
+    return profile
 
 user_profile = build_profile('albert', 'einstein', location='princeton', field='physics')
 print(user_profile)
-	
\ No newline at end of file
+    
\ No newline at end of file