Python 3 preparation: Py2 vs. Py3 value of type() in doctests

[wluebbe]

In Py2 we have

Python 2.7.5+ (default, Feb 27 2014, 19:37:08) 
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> b = True
>>> type(b)
<type 'bool'>

while in Py3

Python 3.3.2+ (default, Feb 28 2014, 00:52:16) 
[GCC 4.8.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> b = True
>>> type(b)
<class 'bool'>

The result may be unified with isinstance(). Py2

>>> isinstance(b, bool)
True

and Py3

>>> isinstance(b, bool)
True

About 161 py module are effected.

This ticket is tracked as a dependency of meta-ticket ticket:16052.

Using:

egrep -R --no-filename -o "<type '[a-z]*'>" src/sage | sort | uniq -c | sort -rn

to find what needs to be done in src/sage:

• 73 <type 'int'>
• 65 <type 'tuple'>
• 43 <type 'object'>
• 35 <type 'float'>
• 32 <type 'str'> #22060
• 22 <type 'dict'>
• 18 <type 'generator'>
• 9 <type 'function'>
• 9 <type 'bool'>
• 8 <type 'long'>
• 5 <type 'instance'>
• 5 <type 'complex'>
• 4 <type 'frozenset'>
• 3 <type 'type'>
• 1 <type 'set'>

and in src/doc:

• 19 <type 'str'>
• 18 <type 'list'>
• 14 <type 'tuple'>
• 14 <type 'function'>
• 8 <type 'int'>
• 8 <type 'instancemethod'>
• 8 <type 'dict'>
• 6 <type 'float'>

[chapoton]

see #21904 for list and #22060 for str