8思维

常用函数

print(2+1)

print(2-1)

print(3*1)

print(3/1)

3.0 /

_

print(2**3)

print(10%3)

print(10/3)

:

e

列表

s=[‘a’,’b’,’c’,’d’]

print(s)

print(len(s))

print(type(s))

:

s=[‘a’,’b’,’c’,’d’]

print(s[2])

print(s[-2])

:

正序-1

s=[‘a’,’b’,’c’,’d’]

print(s[0:4])

print(s[1:3])

print(s[1:])

print(s[:3])

:列表

省略：开头，结尾

s=[‘a’,’b’,’c’,’d’]

s.append(‘e’)

print(s[4])

o

字典

d={‘qq’:[‘1’,’2’,’3’],456:[‘a’,’b’,’c’],’j’:100}

a1=d[‘qq’]

b1=a1[0]

print(b1)

d={‘qq’:[‘1’,’2’,’3’],456:[‘a’,’b’,’c’],’j’:100}

print(d[456])

print(d[456][1])

d={‘qq’:[‘1’,’2’,’3’],456:[‘a’,’b’,’c’],’j’:100}

print(d[‘j’])

d[‘j’]=900

print(d[‘j’])

d={‘qq’:[‘1’,’2’,’3’],456:[‘a’,’b’,’c’],’j’:100}

print(d)

d[89]=’r’

print(d)

新增

2

for

:

冒号+

for i in[1,2,3]:

print(i)

for i in{1:1,2:2,3:3}:

print(i)

字典

字符串

a=10

b=3.14

c=’hh’

print(‘n%dm’%a)

a=10

b=3.14

c=’hh’

print(‘n%fm’%b)

a=10

b=3.14

c=’hh’

print(‘n%sm’%c)

a=10

b=3.14

c=’hh’

print(‘n,%d,or%f+%sm’%(a,b,c))

+

换行，上限