python基础操作

1。f.string字符串

　　它的學名叫作 “Literal String Interpolation”。用法如下：　　

>>>defupper(s):
...    returns.upper()
...
>>>stock= 'tsmc'
>>>close= 217.5
>>>f'{stock} price: {close}'
'tsmc price: 217.5'

　　还可以：

>>>f'{upper(stock)} price: {close}'
'TSMC price: 217.5'
>>>

2,exit 和finally

try:
    sys.exit(0)
except:
    exit(-1)
    print('die')
finally:
    print('cleanup')

输出

cleanup

 

转载于:https://www.cnblogs.com/a-cloud---/p/10758710.html