Note added on string concatenation #261
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| **%** operator became deprecated in Python 3.1 and will be replaced by the | ||
| **format()** method in the later versions. | ||
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| .. code-block:: python |
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A newline is needed after this code-block line (otherwise the foo and bar assignments are treated as arguments to the code-block, and sphinx fails to build this entire code-block).
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Thanks for the warning. I fixed it.
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Not sure what others think, but I prefer to push people toward the right path for the future, which is to just use |
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But when you see the |
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I think it might be clearer to make a note of formatting techniques after the concatenation section, not within it. Otherwise, it seems like you're implying foo = 'foo'
bar = 'bar'
foobar = foo + bar # This is good
foobar = "%s%s" % (foo, bar) # This is good? I don't agree =)Formatting is meant for, well, formatting - not concatenation. Maybe a final paragraph like: |
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Actually, I didn't say in the note that formatting and + approach are equally good, besides formatting with % is slower than the + operator if you concatenate two strings. Here, I just pointed out the role of formatting within the concept of string concatenation. If someone gives a fully-detailed explanation about string formatting separately, it can be done in a different section and maybe linked with this note as well. PS: Anyone keen on writing the string formatting section, should in my humble opinion discourage the use of % operator whatsoever. |
Note added on string concatenation
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Besides the join() function and the + operator for concatenation , there is also this % formatting operator to merge the pre-determined number of strings. However, What's new in Python 3 tells that this will be replaced by the format() function in the later versions.
I added a small note about this change to keep the guys informed.