python - Python 3 Print Variables

Question

Is there a better way to print set of variable in python3 ?

In PHP I useally did something like this: echo "http://$username:$password@$server:$port"

But in python 3 it looks very ugly and longer to type with all those +'s

print('http://'+username+':'+password+'@'+server+':'+port)

Is there something like this in python like "$" symbol ? Thank you.

Answer 1

Python 不支持字符串插值，但您可以使用字符串格式化：

'http://{}:{}@{}:{}'.format(username, password, server, port)

或使用关键字参数（如果您已经在字典中有参数，则最好使用）：

'http://{username}:{password}@{server}:{port}'.format(
    username=username,
    password=password,
    server=server,
    port=port
)

你也可以滥用locals()一点，但我不建议这样做：

'http://{username}:{password}@{server}:{port}'.format(**locals())