python format

 

 

1.  "," 每三位分割
   

   '{:,}'.format(88888888888888)

   

    

    

2. for align,text in zip('<^>',['left','right','right']):
       print('{0:{fill}{align}16}'.format(text,fill=align,align=align))

   

    

    

3. octets=[192,168,0,1]
   print('{:02X}:{:02X}:{:02X}:{:02X}'.format(*octets))

   

    

    

4. for num in range(5,12):
       for base in 'dXob':
           print('{0:{width}{base}}'.format(num,base=base,width=5),end='')
           print()

    

5. 'answer: {:.2%}'.format(19/22)

   

    

    

6. '{0!r:*^20}'.format('b')  # !r repr() !s str()  !a ascii()

   

    

    

    

    

7. 字符串前加f格式化
   

   name = 'jack'
   age = 18
   sex = 'man'
   job = "IT"
   salary = 9999.99
   print(f'name: {name.capitalize()}')
   print(f'age: {age:*^10}')
   print(f'sex: {sex}')
   print(f'salary: {salary:10.3f}')

   

    

    

8. 时间
   

   import datetime
   d=datetime.datetime(2020,7,4,12,15,58)
   '{:%Y-%m-%d %H:%M:%S}'.format(d)

    

9. 'int: {0:#d}, hex: {0:#x}, oct: {0:#0}, bin: {0:#b}'.format(42)