print('hey,u')
print('hey', ' u')
x,y,z = 1,2,3
print(x, y, z)
print('x = %d, y = %d, z = %d' %(x,y,z))
print('x = {}, y = {}, z = {}'.format(x,y,z))
print(f'x = {x}, y = {y}, z = {z}')
print(x)
print(y)
print(z)
print(x, end=' ')
print(y, end=' ')
print(z)

 

 

#test1
x1,y1=1.2,3.57
x2,y2=2.26,8.7
# 输出1
print('{:-^40}'.format('输出1'))
print('x1={},y1={}'.format(x1,y1))
print('x2={},y2={}'.format(x2,y2))
# 输出2
print('{:-^40}'.format('输出2'))
print('x1 = {:.1f}, y1 = {:.1f}'.format(x1, y1))
print('x2 = {:.1f}, y2 = {:.1f}'.format(x2, y2))
# 输出3
print(':{:-^40}'.format('输出3'))
print('x1={:<15.1f},y1={:<15.1f}'.format(x1,y1))
print('x2={:<15.1f},y2={:<15.1f}'.format(x2,y2))
# 输出4
print(':{:-^40}'.format('输出4'))
print('x1={:>15.1f},y1={:>15.1f}'.format(x1,y1))
print('x2={:>15.1f},y2={:>15.1f}'.format(x2,y2))

 

 

name1, age1 = 'Bill', 19
name2, age2 = 'Hellen', 18
title = 'Personnel Information'
print(f'{title:=^40}')
print(f'name: {name1:10}, age: {age1:3}')
print(f'name: {name2:10}, age: {age2:3}')
print(40*'=')

 

 

r1 = eval('1 + 2')
print(type(r1), r1)
r2 = eval('[1, 6, 7.5]')
r3 = eval('"python"')
print(type(r3), r3)
r4 = eval('7, 42')
print(type(r4), r4)
r1 = eval('1 + 2')
print(type(r1), r1)
r2 = eval('[1, 6, 7.5]')
r3 = eval('"python"')
print(type(r3), r3)
r4 = eval('7, 42')
print(type(r4), r4)

 

 

x,y=eval(input('Enter two oprands: '))
ans=x+y
print(f'{x}+{y}={ans}')
print(f'{type(x)}+{type(y)}={type(ans)}')

 

 

 

 

 

 

ans1 = 0.1 + 0.2
print(f'0.1 + 0.2 = {ans1}')
from decimal import Decimal
ans2 = Decimal('0.1') + Decimal('0.2')
print(f'0.1 + 0.2 = {ans2}')

 

 

# 字符编码相关
# chr()返回unicode编码对应的字符
print(chr(0x1f600), end = " ")
print(chr(0x1f601), end = " ")
print(chr(0x1f602), end = " ")
print(chr(0x1f603), end = " ")
print(chr(0x1f604))
print(chr(10000), end=" ")
print(chr(0x025b), end=" ")
print(chr(0x2708), end=" ")
print(chr(0x00A5), end=" ")
print(chr(0x266b))
# ord()返回字符的unicode编码
print(ord('a'), end = " ")
print(ord('b'), end = " ")
print(ord('c'))
print(ord('A'), end = " ")
print(ord('B'), end = " ")
print(ord('C'))
print(ord('0'), end = " ")
print(ord('1'), end = " ")
print(ord('2'))
print(ord('1'), end = " ")
print(ord('2'))

 

 

# 简单的数学计算
from math import sqrt
n = float(input('输入一个数:'))
# python中计算开平方的两种方式
ans1 = sqrt(n)
ans2 = n**0.5
print('%.2f的平方根是: %.2f' %(n, ans1))
print('{:.2f}的平方根是: {:.2f}'.format(n, ans2))
print(f'{n:.2f}的平方根是: {ans2:.2f}')

# 神奇的pi, 与大饼
from math import pi
text = '''
    好奇心是人的天性。
    理想情况下，学习新东西是让人愉快的事。
    但学校里的学习似乎有点像苦役。
    有时候，需要画一个大饼，每次尝试学一些新鲜的，才会每天变得更好一点点。
'''
print(text)
r = float(input('给学习画一个大饼，大饼要做的很大，半径要这么大: '))
circle = 2*pi*r
print(f'绕起来，大饼的圆周有这么长, {circle}, 够不够激发你探索未知的动力...')

x = eval(input('输入一个数字：'))
y = x**365
print(f'x的356次方:{y}')
x = eval(input('输入一个数字：'))
y = x**365
print(f'x的356次方:{y}')
x = eval(input('输入一个数字：'))
y = x**365
print(f'x的356次方:{y}')1

ρ = 1.038
c = 3.7
K = 5.4*10 **(-3)
Tw = 100
Ty = 70
M = 47
M = 67
T0=eval(input("温度最初为："))
from math import log
from math import pi
t=(M**(2/3)*c*(ρ)**(1/3))/(K*pi*pi*((4*pi)/3)**(2/3))*log(0.76*(T0-Tw)/(Ty-Tw))
b=int(t/60)
h=int(t-b*60)
print(f'T0={T0}℃,t={b}分{h}秒')