update so many files

Author: jackfrued

Day07/avgscore.py

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+"""
+
+输入学生考试成绩计算平均分
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	number = int(input('请输入学生人数: '))
+	names = [None] * number
+	scores = [None] * number
+	for index in range(len(names)):
+		names[index] = input('请输入第%d个学生的名字: ' % (index + 1))
+		scores[index] = float(input('请输入第%d个学生的成绩: ' % (index + 1)))
+	total = 0
+	for index in range(len(names)):
+		print('%s: %.1f分' % (names[index], scores[index]))
+		total += scores[index]
+	print('平均成绩是: %.1f分' % (total / number))
+
+
+if __name__ == '__main__':
+	main()

Day07/dict1.py

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+"""
+
+定义和使用字典
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	scores = {'骆昊': 95, '白元芳': 78, '狄仁杰': 82}
+	print(scores['骆昊'])
+	print(scores['狄仁杰'])
+	for elem in scores:
+		print('%s\t--->\t%d' % (elem, scores[elem]))
+	scores['白元芳'] = 65
+	scores['诸葛王朗'] = 71
+	scores.update(冷面=67, 方启鹤=85)
+	print(scores)
+	if '武则天' in scores:
+		print(scores['武则天'])
+	print(scores.get('武则天'))
+	print(scores.get('武则天', 60))
+	print(scores.popitem())
+	print(scores.popitem())
+	print(scores.pop('骆昊', 100))
+	scores.clear()
+	print(scores)
+
+
+if __name__ == '__main__':
+	main()

Day07/dict2.py

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+"""
+
+字典的常用操作
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	stu = {'name': '骆昊', 'age': 38, 'gender': True}
+	print(stu)
+	print(stu.keys())
+	print(stu.values())
+	print(stu.items())
+	for elem in stu.items():
+		print(elem)
+		print(elem[0], elem[1])
+	if 'age' in stu:
+		stu['age'] = 20
+	print(stu)
+	stu.setdefault('score', 60)
+	print(stu)
+	stu.setdefault('score', 100)
+	print(stu)
+	stu['score'] = 100
+	print(stu)
+
+
+if __name__ == '__main__':
+	main()

Day07/fibonacci.py

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+"""
+
+生成斐波拉切数列
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	f = [1 , 1]
+	for i in range(2, 20):
+		f += [f[i - 1] + f[i - 2]]
+		# f.append(f[i - 1] + f[i - 2])
+	for val in f:
+		print(val, end=' ')
+
+
+if __name__ == '__main__':
+	main()

Day07/findmax.py

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+"""
+
+找出列表中最大或最小的元素
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	fruits = ['grape', 'apple', 'strawberry', 'waxberry', 'pitaya']
+	# 直接使用内置的max和min函数找出列表中最大和最小元素
+	# print(max(fruits))
+	# print(min(fruits))
+	max_value = min_value = fruits[0]
+	for index in range(1, len(fruits)):
+		if fruits[index] > max_value:
+			max_value = fruits[index]
+		elif fruits[index] < min_value:
+			min_value = fruits[index]
+	print('Max:', max_value)
+	print('Min:', min_value)
+
+
+if __name__ == '__main__':
+	main()
+# 想一想如果最大的元素有两个要找出第二大的又该怎么做 

Day07/list1.py

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+"""
+
+定义和使用列表
+	- 用下标访问元素
+	- 添加元素
+	- 删除元素
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	fruits = ['grape', '@pple', 'strawberry', 'waxberry']
+	print(fruits)
+	# 通过下标访问元素
+	print(fruits[0])
+	print(fruits[1])
+	print(fruits[-1])
+	print(fruits[-2])
+	# print(fruits[-5]) # IndexError
+	# print(fruits[4])	# IndexError
+	fruits[1] = 'apple'
+	print(fruits)
+	# 添加元素
+	fruits.append('pitaya')
+	fruits.insert(0, 'banana')
+	print(fruits)
+	# 删除元素
+	del fruits[1]
+	fruits.pop()
+	fruits.pop(0)
+	fruits.remove('apple')
+	print(fruits)
+
+
+if __name__ == '__main__':
+	main()

Day07/list2.py

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+"""
+
+列表常用操作
+	- 列表连接
+	- 获取长度
+	- 遍历列表
+	- 列表切片
+	- 列表排序
+	- 列表反转
+	- 查找元素
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	fruits = ['grape', 'apple', 'strawberry', 'waxberry']
+	fruits += ['pitaya', 'pear', 'mango']
+	# 循环遍历列表元素
+	for fruit in fruits:
+		print(fruit.title(), end=' ')
+	print()
+	# 列表切片
+	fruits2 = fruits[1:4]
+	print(fruits2)
+	# fruit3 = fruits  # 没有复制列表只创建了新的引用
+	fruits3 = fruits[:]
+	print(fruits3)
+	fruits4 = fruits[-3:-1]
+	print(fruits4)
+	fruits5 = fruits[::-1]
+	print(fruits5)
+
+
+if __name__ == '__main__':
+	main()

Day07/list3.py

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+"""
+
+生成列表
+	- 用range创建数字列表
+	- 生成表达式
+	- 生成器
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+# 生成Fibonacci序列的生成器
+def fib(n):
+	a, b = 0, 1
+	for _ in range(n):
+		a, b = b, a + b
+		yield a
+
+
+def main():
+	# 用range创建数值列表
+	list1 = list(range(1, 11))
+	print(list1)
+	# 生成表达式
+	list2 = [x * x for x in range(1, 11)]
+	print(list2)
+	list3 = [m + n for m in 'ABCDEFG' for n in '12345']
+	print(list3)
+	print(len(list3))
+	# 生成器(节省空间但生成下一个元素时需要花费时间)
+	gen = (m + n for m in 'ABCDEFG' for n in '12345')
+	print(gen)
+	for elem in gen:
+		print(elem, end=' ')
+	print()
+	gen = fib(20)
+	print(gen)
+	for elem in gen:
+		print(elem, end=' ')
+	print()
+
+
+if __name__ == '__main__':
+	main()

Day07/lottery.py

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+"""
+
+双色球随机选号程序
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+from random import randrange, randint, sample
+
+
+def display(balls):
+	"""
+	输出列表中的双色球号码
+	"""
+	for index, ball in enumerate(balls):
+		if index == len(balls) - 1:
+			print('|', end=' ')
+		print('%02d' % ball, end=' ')
+	print()
+
+
+def random_select():
+	"""
+	随机选择一组号码
+	"""
+	red_balls = [x for x in range(1, 34)]
+	selected_balls = []
+	for _ in range(6):
+		index = randrange(len(red_balls))
+		selected_balls.append(red_balls[index])
+		del red_balls[index]
+	# 上面的for循环也可以写成下面这行代码
+	# sample函数是random模块下的函数
+	# selected_balls = sample(red_balls, 6)
+	selected_balls.sort()
+	selected_balls.append(randint(1, 16))
+	return selected_balls
+
+
+def main():
+	n = int(input('机选几注: '))
+	for _ in range(n):
+		display(random_select())
+
+
+if __name__ == '__main__':
+	main()

Day07/marquee.py

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+"""
+
+输入学生考试成绩计算平均分
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+import os
+import time
+
+
+def main():
+	str = 'Welcome to 1000 Phone Chengdu Campus      '
+	while True:
+		print(str)
+		time.sleep(0.2)
+		str = str[1:] + str[0:1]
+		# for Windows use os.system('cls') instead
+		os.system('clear')
+
+
+if __name__ == '__main__':
+	main()

Day07/res/fibonacci-blocks.png

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+"""
+
+学生考试成绩表
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+	names = ['关羽', '张飞', '赵云', '马超', '黄忠']
+	subjs = ['语文', '数学', '英语']
+	scores = [[0] * 3] * 5
+	for row, name in enumerate(names):
+		print('请输入%s的成绩' % name)
+		for col, subj in enumerate(subjs):
+			scores[row][col] = float(input(subj + ': '))
+	print(scores)
+#	for row, name in enumerate(names):
+#		print('请输入%s的成绩' % name)
+#		scores[row] = [None] * len(subjs)
+#		for col, subj in enumerate(subjs):
+#			score = float(input(subj + ': '))
+#			scores[row][col] = score
+#	print(scores)
+
+if __name__ == '__main__':
+	main()