Here is a weird bug in the sage command line. As you may have noticed,
the sage: prompt does not return, and the command is actually still
inside the for loop.
┌────────────────────────────────────────────────────────────────────┐
│ Sage Version 6.1.beta5, Release Date: 2014-01-15 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: V = Integers(2)**2
sage: for v in V:
....: print v # pressing ^C now
KeyboardInterrupt
....: # This line is not indented. Let's press Enter
....: # This line is indented.
....: 2+2 # Still indented (and in reality we are inside the for loop)
KeyboardInterrupt
....: 2+2
....:
KeyboardInterrupt
....:
File "<ipython-input-2-d2906b15c545>", line 4
Integer(2)+Integer(2)
^
IndentationError: expected an indented block
If you want to paste code into IPython, try the %paste and %cpaste magic
functions.
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