python的滥觞

# python的滥觞

python的骨骼

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python 的经典题型

if 语句嵌套

year = int(input(‘请输入年份:’))
if year %4 == 0:
if year %100 ==0:
if year %400 ==0:
print(year,‘是闰年’)
else:
print(year,‘年不是闰年’)
else:
print(year,‘年是闰年’)
else:
print(year,‘年不是闰年’)

字符串的格式化

n = 14
s = ‘{0:X}–{0:#05x}’.format(n)
print( s )

n = 27
m = 57
s = ‘{:<4d}+{:>4d}’.format(n,m)
print( s )

x = ‘我知道你不知道我知道’.split(‘道’)
y = ‘#’.join(x)
print( y )

a = ‘编号{},名字叫{},性格是{}’.format(33,‘踵’,‘沉稳内敛’)
print(a)

b = ‘编号{1:^10},名字叫{0},性格是{2}’.format(33,‘踵’,‘沉稳内敛’)
print(b)

c = ‘编号{1:>10s},名字叫{},性格是{}’.format(33,‘踵’,‘沉稳内敛’)
print©

对于列表的排序

用for循环和enumerate函数实现对于列表的索引与元素内容

list = [23,12,34,12,45,12,12]
for index, item in enumerate(list):
print(index,item)

统计列表元素出现的次数

a = []
import random
a = [random.randint(0,100)for i in range(100)]
print(a)
b = a.count(input(‘请输入一个数:’))
print(b)
c = sum(a)
print©

A = [20170101,20170102,20170103,20170104,20170109,20170110,20170111,20170112,20170113,20170114,2017020170105,20170106,20170107,20170108,115,20170116,20170117,20170118,20170119,20170120,20170121,20170122,20170123,20170124,20170125,20170126,20170127,20170128,20170129,20170130,20170131]
B = [20170201,20170202,20170203,20170204,20170205,20170206,20170207,20170208,20170209,20170210,20170211,20170212,20170213,20170214,20170215,20170216,20170217,20170218,20170219,20170220,20170221,20170222,20170223,20170224,20170225,20170226,20170227,20170228]
C = [20170301,20170302,20170303,20170304,20170305,20170306,20170307,20170308,20170309,20170310,20170311,20170312,20170313,20170314,20170315,20170316,20170317,20170318,20170319,20170320,20170321,20170322,20170323,20170324,20170325,20170326,20170327,20170328,20170329,20170330,20170331]
H = [A,B,C]
input(“请输入星期几”)
h=0
G=0
while H:
if h<31:
print(H[G][h])
h=h+7
if h>31:
break
G=G+1
i=4
while H:
if i<28:
print(H[G][i])
i=i+7
if i>28:
break
G=G+1
j=4
while H:
if j<31:
print(H[G][j])
j=j+7
if j>31:
break

s = “abcABCabc”
print(str.lower(s))

print(str.upper(s))

y=“A，B，C”.split(",")
print(y)

t=“a apple a day”.count(“a”)
print(t)

z=s.replace(“a”,“111”)
print(z)

v=s.center(20,"=")
print(v)

f="= python ="
ff=f.strip("= np")
print(ff)

u=",".join(“12345”)
print(u)

“”"
for line in open(“test.txt”,encoding = “utf-8”):

b=(line.split(",")[2]) #所有销售价格

“”"
ball=(4.5+3+5.5+5+3+4.5+7+8+3+2+5+3+3+5+5+5)
print(ball)
Z=1
for line in open(“test.txt”,encoding = “utf-8”):
b=(line.split(",")[5])
c=(b.split(" “)[1])
print(c[0])
while line:
if 8 < int(c[Z]) < 12:
print(“430g泰奇八宝粥,2017/1/1 8:45,E,已出货未退款,已提现,48g好丽友薯愿香烤原味,2017/1/1 9:05,C,已出货未退款,已提现，600ml可口可乐,2017/1/1 9:41,B,已出货未退款,已提现营养快线,2017/1/1 9:41,B,已出货未退款,已提现，330ml伊利畅意乳酸菌原味,2017/1/1 10:02,C,已出货未退款,已提现，160g盼盼手撕面包,2017/1/1 11:33,C,已出货未退款,已提现，茉莉蜜茶,2017/1/1 11:56,B,已出货未退款,已提现，鸭翅,2017/1/1 11:56,C,已出货未退款,已提现”)
else: Z=Z+1
0:02,C,已出货未退款,已提现，160g盼盼手撕面包,2017/1/1 11:33,C,已出货未退款,已提现，茉莉蜜茶,2017/1/1 11:56,B,已出货未退款,已提现，鸭翅,2017/1/1 11:56,C,已出货未退款,已提现”)
else: Z=Z+1
break