替代在Python 3.5+中传递格式字符串作为关键字参数

Question

In Python 3.5, using keyword arguments in str.format has been deprecated:

"Hi {s}".format(s="world")

From the string docs :

Deprecated since version 3.5 : Passing a format string as keyword argument format_string has been deprecated.

What are the best alternatives in Python 3.5+?

Answer 1

Deprecation is about string.Formatter and not about str.Formatter :

Source:

Passing a format string as keyword argument format_string to the format() method of the string.Formatter class has been deprecated.

You can use in str.format , but not in string.Formatter

Answer 2

Or use fstrings :

name = "Bob"
hello = f"Hello {name}"
print (hello)

Output:

Hello Bob

Answer 3

Try this

name = "john"
hello = "GoodMorning %s" %(name,)
print (hello)