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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/howto/functional.rst | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/Doc/howto/functional.rst b/Doc/howto/functional.rst index 74e8614..c7f8bc8 100644 --- a/Doc/howto/functional.rst +++ b/Doc/howto/functional.rst @@ -65,11 +65,10 @@ output must only depend on its input. Some languages are very strict about purity and don't even have assignment statements such as ``a=3`` or ``c = a + b``, but it's difficult to avoid all -side effects. Printing to the screen or writing to a disk file are side -effects, for example. For example, in Python a call to the :func:`print` or -:func:`time.sleep` function both return no useful value; they're only called for -their side effects of sending some text to the screen or pausing execution for a -second. +side effects, such as printing to the screen or writing to a disk file. Another +example is a call to the :func:`print` or :func:`time.sleep` function, neither +of which returns a useful value. Both are called only for their side effects +of sending some text to the screen or pausing execution for a second. Python programs written in functional style usually won't go to the extreme of avoiding all I/O or all assignments; instead, they'll provide a |