# 引入模块 from abstest import my_abs result = my_abs(111) print(result)
from abstest import my_abs
print(my_abs(-89))
print('hello')
# -*- coding: utf-8 -*-
from abstest import my_abs
import math
print(abs(-10))
print(max(1, 2, 3, -1, 2, 4, 100))
print(hex(100))
# 自定义函数
# def my_abs(x):
# if x >= 0:
# return x
# else:
# return -x
print(my_abs(-100))
# 定义两个返回的函数
def move(x, y, step, angle=0):
nx = x + step * math.cos(angle)
ny = y - step * math.sin(angle)
return nx, ny
# 使用函数
x, y = move(100, 100, 60, math.pi / 6)
print(x, y)
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# 在Python中，定义一个函数要使用def语句，依次写出函数名、括号、括号中的参数和冒号:，然后，在缩进块中编写函数体，函数的返回值用return语句返回。
# 如果没有return语句，函数执行完毕后也会返回结果，只是结果为None。
# return None可以简写为return
from abstest import my_abs
print('01.', my_abs(-100))
# import的用法在后续模块一节中会详细介绍。
# 如果想定义一个什么事也不做的空函数，可以用pass语句：
def nop():
pass
# 实际上pass可以用来作为占位符，比如现在还没想好怎么写函数的代码，就可以先放一个pass，让代码能运行起来。
# import math语句表示导入math包，并允许后续代码引用math包里的sin、cos等函数。
import math
# 返回多个值
def move(x, y, step, angle=0):
nx = x + step * math.cos(angle)
ny = y - step * math.sin(angle)
return nx, ny
# 同时获得返回值
from abstest import my_abs
from abstest import a
from functools import reduce
print(my_abs(-23))
a()
L = list(range(100))
print(L[2:7])
d = {'a': 1, 'b': 2, 'c': 3}
for key in d:
print(key)
for x, y in [(1, 1), (2, 4), (3, 9)]:
print(x, y)
def f**k(x):
return 2 * x
r = map(f**k, [1, 2, 3, 4, 5, 6, 7, 8, 9])
print(list(r))
def add(x, y):
return x + y
print(reduce(add, [12, 23, 34]))
import math #import math 语句表示导入 math 包，并允许后续代码引用 math包里的 sin、cos 等函数
def move(x, y, step, angle = 0):
nx = x + step * math.cos(angle)#横坐标变换
ny = y - step * math.sin(angle)#纵坐标变换
return nx, ny
print('\n'*3)
print(move(2, 4, 3, angle=4))
print(move(4, 1, 2, angle=0))
x, y = move(100, 100, 60, math.pi / 6)
r = move(100, 100, 60, math.pi / 6)#Python 的函数返回多值其实就是返回一个 tuple，但写起来更方返回一个 tuple 可以省略括号
print(x, y)#返回一个 tuple 可以省略括号？
print(r)
from abstest import my_abs #用from abstest import my_abs来导入my_abs()函数
print(my_abs(-3))
print(max(2, 3, 1, 9))
print(max(s))
print(min(s))
print(int('223'))
print(bool(8), bool(-2), bool(0))
print(str(288))
help(hex)
print(hex(11))
# 自定义函数
print('自定义的绝对值函数', my_abs(-8))
# print('报错', my_abs('3'))
nop()
# 多返回值函数返回的实质上是一个tuple, 多个变量可以同时接收一个tuple, 按位置赋给对应的值
def move(x, y, step, angle=0):
nx = x + step * math.cos(angle)
ny = y - step * math.sin(angle)
return nx, ny
x, y = move(100, 100, 60, math.pi / 6)
print(x, y)
print(move(100, 100, 60, math.pi/6))
a, b = (3, 5)
from abstest import my_abs my_abs(-9)
print(1 + 1 + 3)
else:
print('不好啊')
print(uuid.uuid1())
# hex()
# n1 = 255
# n2 = 1000
print(hex(255))
# 0xff
print(my_abs(-128))
print(power2(16))
print(power(15,2))
print(power(4,3))
# 输出2的平方根
print(math.sqrt(2))
print(math.sin(math.pi/2))
enroll('LC','LC1')
print(fact(5))
# 切片
L = ['Michael', 'Sarah', 'Tracy', 'Bob', 'Jack']
from abstest import my_abs
n1 = 255
n2 = 1000
print(hex(n1))
print(hex(n2))
print('my_abs(10)', my_abs(10))
print('my_abs(-10)', my_abs(10))
def calc(*numbers):
sum = 0
for n in numbers:
sum = sum + n * n
return sum
print(calc())
print(calc(1, 2, 3, 4))
def add_end(L=[]):
L.append('END')
return L
print(add_end())
print(add_end())
def add_end1(L=None):
if L is None:
L = []
L.append('END')
print(abs(-10))
print(max(1, 5, -15, 8))
print(int('123'))
#123
print(int(12.34))
#12
print(float("12.34"))
#12.34
print(float("12"))
#12.0
print(str(100))
print(str(12.34))
print(bool(1))
#True
print(bool(''))
#False
print(hex(1))
#0x1
from abstest import my_abs
print(my_abs(-222))
#调用外部函数
from abstest import my_abs print(my_abs(200)) print(my_abs(-200))
s = set([1, 2, 3, 4, (1, 2, 3)])
s
d = {(1, ):10}
print(d)
print(str(hex(110)) + '\n' + str(hex(120)))
## 定义函数
def my_abs( x ):
if x >= 0:
return x
else:
return -x
print(my_abs(-99))
from abstest import my_abs
print(my_abs(-110))
def my_abs2(x):
if not isinstance(x, (int, float)):
raise TypeError('bad operand type~')
if x >= 0:
pass
else:
return
print(my_abs2('a'))
## 位置函数
def power(x, n):
from abstest import my_abs my_abs(-10)
from abstest import my_abs,move,quadratic,power,power1,enroll,add_end,calc,person,person1
import math
#测试my_abs
print(my_abs(-20))
print(my_abs(99))
#print(my_abs('a'))
#测试move
x,y=move(100,100,60,math.pi/6)#返回的是一个tuple，可以使用多个变量接收，按位置赋值给变量
print(x,y)
z=move(50,50,30,math.pi/6)#返回tuple,在语法上返回一个tuple可以省略括号
print(z)
#测试二元一次方程式跟求解
print(math.sqrt(2))
print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
print('quadratic(1, 3, -4) =', quadratic(4, 1, 1))
print('quadratic(1, 3, -4) =', quadratic(1, 2, 1))
if quadratic(2,3,1)!=(-0.5,-1.0):
print('测试失败')
if quadratic(1,3,-4)!=(1.0,-4.0):
print('测试失败')
else:
print('测试成功')
#print('quadratic(b, 2, 1) =', quadratic(1, 'c', 1))
'''
函数的参数测试
print(float('12.34'))
print(str(1.23))
print(str(100))
print(bool(1))
print(bool(''))
a = abs
print(a(-1))
n1 = 255
n2 = 1000
print(hex(255))
print(hex(1000))
from abstest import my_abs
print(my_abs(-2))
#print(my_abs(-2,3))
#print(my_abs('222'))
'''
pass用法
def nop():
pass
age = 26
if age >= 18:
pass
'''
import math
def move(x, y, step, angle=0):
from abstest import my_abs
print('hello world')
names = ['Tom', 'Jack', 'Mary']
for name in names:
print(name)
print(my_abs(-5))
print 'I\'m ok.'
print 3 > 2
classmates = ['Michael', 'Bob', 'Tracy']
classmates.append("lhz")
print len(classmates)
print classmates[-1]
print max(1, 2)
from abstest import my_abs
print my_abs(-100)
L = ['Michael', 'Sarah', 'Tracy', 'Bob', 'Jack']
for i in L:
print i
def odd():
print('step 1')
yield 1
print('step 2')
yield (3)
print('step 3')
yield (5)
o = odd()
next(o)
next(o)
from abstest import my_abs print(my_abs(int(input())))
#! usr/bin/evn python3
# -*- coding: utf-8 -*-
from abstest import my_abs
print(my_abs(9))
print(my_abs(-10))
#print(my_abs('a'))
print(d['Bob'])
d['aa'] = 3
print(d['aa'])
d['Jack'] = 90
print('d[\'Jack\'] is %s' % d['Jack'])
d['Jack'] = 39
print('d[\'Jack\'] is %s' % d['Jack'])
print('hh' in d)
print(d.get('jack', -1))
print('d[\'Jack\'] is %s' % d.get('Jack', -1))
#help(abs)
print(abs(-19))
n1 = 299
print(hex(n1))
from abstest import my_abs
print(my_abs(-8))
def enroll(name, gender, age=6, city='Beijing'):
print('name:', name)
print('gender:', gender)
print('age:', age)
print('city:', city)
enroll('aa', 'asd', '7', 'beijing')
enroll('xx', '89')
def calc(*numbers):
sum = 0
# 函数执行完毕也没有return语句时，自动return None
from abstest import my_abs
print(my_abs(-9))
# practice
# 请定义一个函数quadratic(a, b, c)，接收3个参数，返回一元二次方程：
# ax2 + bx + c = 0
# 的两个解。
def quadratic(a, b, c):
import math
if not isinstance(a, (int, float)):
raise TypeError('数据类型错误')
elif not isinstance(b, (int, float)):
raise TypeError('数据类型错误')
elif not isinstance(c, (int, float)):
raise TypeError('数据类型错误')
d = b * b - 4 * a * c
if a == 0:
print('a值不能为0')
x1 = (-b + math.sqrt(d)) / 2 / a
x2 = (-b - math.sqrt(d)) / 2 / a
return x1, x2
# 测试:
print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
print('n1 = %d = %s' % (n1,hex(n1)))
print('n2 = %d = %s' % (n2,hex(n2)))
##################test part three#################
##########define function
#def my_abs(x):
# if x >= 0:
# return x
# else:
# return -x
x = 100
y = -100
print('x =',my_abs(x))
print('y =',my_abs(y))
#my_abs('A')
nop()
x1,y1 = move(100,100,60,math.pi / 6)
print(x1,y1)
print(quadratic(2,3,1))
print(quadratic(1,3,-4))
print(power(5))
print(power(5,3))
person('Micheal',30)
person('Bob',35,city='Beijing')
