python – Pythonic way to create a long multi-line string

python – Pythonic way to create a long multi-line string

Are you talking about multi-line strings? Easy, use triple quotes to start and end them.

s =  this is a very
        long string if I had the
        energy to type more and more ...

You can use single quotes too (3 of them of course at start and end) and treat the resulting string s just like any other string.

NOTE: Just as with any string, anything between the starting and ending quotes becomes part of the string, so this example has a leading blank (as pointed out by @root45). This string will also contain both blanks and newlines.

I.e.,:

 this is a veryn        long string if I had then        energy to type more and more ...

Finally, one can also construct long lines in Python like this:

 s = (this is a very
      long string too
      for sure ...
     )

which will not include any extra blanks or newlines (this is a deliberate example showing what the effect of skipping blanks will result in):

this is a verylong string toofor sure ...

No commas required, simply place the strings to be joined together into a pair of parenthesis and be sure to account for any needed blanks and newlines.

If you dont want a multiline string, but just have a long single line string, you can use parentheses. Just make sure you dont include commas between the string segments (then it will be a tuple).

query = (SELECT   action.descr as action, 
         role.id as role_id,
         role.descr as role
          FROM 
         public.role_action_def,
         public.role,
         public.record_def, 
         public.action
          WHERE role.id = role_action_def.role_id AND
          record_def.id = role_action_def.def_id AND
          action.id = role_action_def.action_id AND
          role_action_def.account_id = +account_id+ AND
          record_def.account_id=+account_id+ AND
          def_id=+def_id)

In a SQL statement like what youre constructing, multiline strings would also be fine. But if the extra white space a multiline string would contain would be a problem, then this would be a good way to achieve what you want.

As noted in the comments, concatenating SQL queries in this way is a SQL injection security risk waiting to happen, so use your databases parameterized queries feature to prevent this. However, Im leaving the answer as-is otherwise as it directly answers the question asked.

python – Pythonic way to create a long multi-line string

python – Pythonic way to create a long multi-line string

Breaking lines by works for me. Here is an example:

longStr = This is a very long string  
        that I wrote to help somebody  
        who had a question about  
        writing long strings in Python