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Editorial Team
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Asked: 2026-05-27T05:19:31+00:00

sqlstring = ‘INSERT INTO {}’ table = ‘Product’ sqlstring.format(table) does not result to ‘INSERT

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sqlstring = 'INSERT INTO {}'
table = 'Product'
sqlstring.format(table)

does not result to ‘INSERT INTO Product’ but still ‘INSERT INTO {}’ why is this so?

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1 Answer

  1. Editorial Team

    Python 3.2 does this correctly:

    $ python3.2
Python 3.2.2 (default, Sep  5 2011, 22:09:30) 
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> sqlstring = 'INSERT INTO {}'
>>> table = 'Product'
>>> sqlstring.format(table)
'INSERT INTO Product'
>>>

    What version are you using?

    Additional thought:

    Strings are immutable and do not self-modify in-place. Maybe you want:

    sqlstring = sqlstring.format(table)

    If format strings self-modified themselves in place it would be quite annoying for Python programmers, as each format string could only be used once. Sometimes we want the chance to build a nice format string then use it hundreds of times — which is easy if format() returns the result instead of modifying the format in-place.

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