How to split up a long f-string in python?

问题

I am getting a line too long pep8 E501 issue.

f'Leave Request created successfully. Approvers sent the request for approval: {leave_approver_list}'

I tried using a multi-line string, but that brings in a \n, which breaks my test:

f'''Leave Request created successfully.
Approvers sent the request for approval: {leave_approver_list}'''

How can I keep it single line and pass pep8 linting

回答1:

You will need a line break unless you wrap your string within parentheses. In this case, f will need to be prepended to the second line:

'Leave Request created successfully.'\ 
f'Approvers sent the request for approval: {leave_approver_list}'

Here's a little demo:

In [97]: a = 123

In [98]: 'foo_'\
    ...: f'bar_{a}'
Out[98]: 'foo_bar_123'

I recommend juanpa's answer since it is cleaner, but this is one way to do this.

回答2:

Use parentheses and string literal concatenation:

msg = (
         f'Leave Request created successfully. '
         f'Approvers sent the request for approval: {leave_approver_list}'
)

Note, the first literal doesn't need an f, but I include it for consistency/readability.

回答3:

Just add a backslash \ character:

f'''Leave Request created successfully.\
Approvers sent the request for approval: {leave_approver_list}'''

来源：https://stackoverflow.com/questions/48881196/how-to-split-up-a-long-f-string-in-python