更多关于字符串string

1 print('Chris' + 2)

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-37-82ccfdd3d5d3> in <module>()
----> 1 print('Chris' + 2)

TypeError: must be str, not int

print('Chris' + str(2))

Chris2

字符串的格式设置 
1 sales_record = {
 2 'price': 3.24,
 3 'num_items': 4,
 4 'person': 'Chris'}
 5 
 6 sales_statement = '{} bought {} item(s) at a price of {} each for a total of {}'
 7 
 8 print(sales_statement.format(sales_record['person'],
 9                              sales_record['num_items'],
10                              sales_record['price'],
11                              sales_record['num_items']*sales_record['price']))

Chris bought 4 item(s) at a price of 3.24 each for a total of 12.96