'f={0}'.format(x)

'f=x'

'f={0:.3f}'.format(3.333333)

'f=3.333'

d = {'name':'sboku', 'age':'30', 'job':'engineer'}

'name:{0}, age:{1}'.format(d.get('name'), d.get('age'))

10//4 --> 2

10//4.0 -->2.0

import math
math.floor(3.4) -->3 math.floor(3.9) --> 3

math.floor(-3.4) -->-4  math.floor(-3.9) --> -4

math.trunc(3.9) -->3 math.trunc(-3.9) --> -3

0o 8进制, 0x 16进制, 0b 2进制

转换 oct(), hex(), bin()

"what's your name" == 'what\'s your name'

s = "asdfasdfagaf"

s[:] --> 'asdfasdfagaf'

s[-1] --> 'f', s[:-1] --> 'f'

s[::2] --> 'adadaa'

s[::3] --> 'afdg'