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annotate Lib/curses/wrapper.py @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents c731e02472c5
children
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1 """curses.wrapper
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2
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3 Contains one function, wrapper(), which runs another function which
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4 should be the rest of your curses-based application. If the
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5 application raises an exception, wrapper() will restore the terminal
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6 to a sane state so you can read the resulting traceback.
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7
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8 """
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9
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10 import curses
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12 def wrapper(func, *args, **kwds):
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13 """Wrapper function that initializes curses and calls another function,
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14 restoring normal keyboard/screen behavior on error.
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15 The callable object 'func' is then passed the main window 'stdscr'
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16 as its first argument, followed by any other arguments passed to
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17 wrapper().
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18 """
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19
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20 try:
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21 # Initialize curses
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22 stdscr = curses.initscr()
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23
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24 # Turn off echoing of keys, and enter cbreak mode,
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25 # where no buffering is performed on keyboard input
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26 curses.noecho()
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27 curses.cbreak()
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28
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29 # In keypad mode, escape sequences for special keys
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30 # (like the cursor keys) will be interpreted and
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31 # a special value like curses.KEY_LEFT will be returned
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32 stdscr.keypad(1)
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33
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34 # Start color, too. Harmless if the terminal doesn't have
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35 # color; user can test with has_color() later on. The try/catch
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36 # works around a minor bit of over-conscientiousness in the curses
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37 # module -- the error return from C start_color() is ignorable.
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38 try:
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39 curses.start_color()
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40 except:
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41 pass
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42
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43 return func(stdscr, *args, **kwds)
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44 finally:
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45 # Set everything back to normal
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46 if 'stdscr' in locals():
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47 stdscr.keypad(0)
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48 curses.echo()
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49 curses.nocbreak()
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50 curses.endwin()