update Day06

Author: jackfrued

Day06/function1.py

@@ -0,0 +1,20 @@
+"""
+
+函数的定义和使用 - 计算组合数C(7,3)
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+
+# 将求阶乘的功能封装成一个函数
+def factorial(n):
+	result = 1
+	for num in range(1, n + 1):
+		result *= num
+	return result
+
+
+print(factorial(7) // factorial(3) // factorial(4))

Day06/function2.py

@@ -0,0 +1,26 @@
+"""
+
+函数的定义和使用 - 求最大公约数和最小公倍数
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+
+def gcd(x, y):
+	if x > y:
+		(x, y) = (y, x)
+	for factor in range(x, 1, -1):
+		if x % factor == 0 and y % factor == 0:
+			return factor
+	return 1
+
+
+def lcm(x, y):
+	return x * y // gcd(x, y)
+
+
+print(gcd(15, 27))
+print(lcm(15, 27))

Day06/function3.py

@@ -0,0 +1,31 @@
+"""
+
+Python的内置函数
+	- 数学相关: abs / divmod / pow / round / min / max / sum
+	- 序列相关: len / range / next / filter / map / sorted / slice / reversed
+	- 类型转换: chr / ord / str / bool / int / float / complex / bin / oct / hex
+	- 数据结构: dict / list / set / tuple
+	- 其他函数: all / any / id / input / open / print / type
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+
+def myfilter(mystr):
+	return len(mystr) == 6
+
+
+# help()
+print(chr(0x9a86))
+print(hex(ord('骆')))
+print(abs(-1.2345))
+print(round(-1.2345))
+print(pow(1.2345, 5))
+fruits = ['orange', 'peach', 'durian', 'watermelon']
+print(fruits[slice(1, 3)])
+fruits2 = list(filter(myfilter, fruits))
+print(fruits)
+print(fruits2)

Day06/function4.py

@@ -0,0 +1,42 @@
+"""
+
+Python常用模块
+	- 运行时服务相关模块: copy / pickle / sys / ...
+	- 数学相关模块: decimal / math / random / ...
+	- 字符串处理模块: codecs / re / ...
+	- 文件处理相关模块: shutil / gzip / ...
+	- 操作系统服务相关模块: datetime / os / time / logging / io / ...
+	- 进程和线程相关模块: multiprocessing / threading / queue
+	- 网络应用相关模块: ftplib / http / smtplib / urllib / ...
+	- Web编程相关模块: cgi / webbrowser
+	- 数据处理和编码模块: base64 / csv / html.parser / json / xml / ...
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+import time
+import shutil
+import os
+
+seconds = time.time()
+print(seconds)
+localtime = time.localtime(seconds)
+print(localtime)
+print(localtime.tm_year)
+print(localtime.tm_mon)
+print(localtime.tm_mday)
+asctime = time.asctime(localtime)
+print(asctime)
+strtime = time.strftime('%Y-%m-%d %H:%M:%S', localtime)
+print(strtime)
+mydate = time.strptime('2018-1-1', '%Y-%m-%d')
+print(mydate)
+
+shutil.copy('/Users/Hao/hello.py', '/Users/Hao/Desktop/first.py')
+os.system('ls -l')
+os.chdir('/Users/Hao')
+os.system('ls -l')
+os.mkdir('test')

Day06/function5.py

@@ -0,0 +1,54 @@
+"""
+
+函数的参数
+	- 默认参数
+	- 可变参数
+	- 关键字参数
+	- 命名关键字参数
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+
+# 参数默认值
+def f1(a, b=5, c=10):
+	return a + b * 2 + c * 3
+
+
+print(f1(1, 2, 3))
+print(f1(100, 200))
+print(f1(100))
+print(f1(c=2, b=3, a=1))
+
+
+# 可变参数
+def f2(*args):
+	sum = 0
+	for num in args:
+		sum += num
+	return sum
+
+
+print(f2(1, 2, 3))
+print(f2(1, 2, 3, 4, 5))
+print(f2())
+
+
+# 关键字参数
+def f3(**kw):
+	if 'name' in kw:
+		print('欢迎你%s!' % kw['name'])
+	elif 'tel' in kw:
+		print('你的联系电话是: %s!' % kw['tel'])
+	else:
+		print('没找到你的个人信息!')
+
+
+param = {'name': '骆昊', 'age': 38}
+f3(**param)
+f3(name='骆昊', age=38, tel='13866778899')
+f3(user='骆昊', age=38, tel='13866778899')
+f3(user='骆昊', age=38, mobile='13866778899')

Day06/function6.py

@@ -0,0 +1,47 @@
+"""
+
+作用域问题
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-05
+
+"""
+
+
+# 局部作用域
+def foo1():
+	a = 5
+
+
+foo1()
+# print(a)	# NameError
+
+# 全局作用域
+b = 10
+
+
+def foo2():
+	print(b)
+
+
+foo2()
+
+
+def foo3():
+	b = 100		# 局部变量
+	print(b)
+
+
+foo3()
+print(b)
+
+
+def foo4():
+	global b
+	b = 200		# 全局变量
+	print(b)
+
+
+foo4()
+print(b)