| """ Fixer for itertools.(imap|ifilter|izip) --> (map|filter|zip) and |
| itertools.ifilterfalse --> itertools.filterfalse (bugs 2360-2363) |
| |
| imports from itertools are fixed in fix_itertools_import.py |
| |
| If itertools is imported as something else (ie: import itertools as it; |
| it.izip(spam, eggs)) method calls will not get fixed. |
| """ |
| |
| # Local imports |
| from .. import fixer_base |
| from ..fixer_util import Name |
| |
| class FixItertools(fixer_base.BaseFix): |
| BM_compatible = True |
| it_funcs = "('imap'|'ifilter'|'izip'|'izip_longest'|'ifilterfalse')" |
| PATTERN = """ |
| power< it='itertools' |
| trailer< |
| dot='.' func=%(it_funcs)s > trailer< '(' [any] ')' > > |
| | |
| power< func=%(it_funcs)s trailer< '(' [any] ')' > > |
| """ %(locals()) |
| |
| # Needs to be run after fix_(map|zip|filter) |
| run_order = 6 |
| |
| def transform(self, node, results): |
| prefix = None |
| func = results['func'][0] |
| if ('it' in results and |
| func.value not in (u'ifilterfalse', u'izip_longest')): |
| dot, it = (results['dot'], results['it']) |
| # Remove the 'itertools' |
| prefix = it.prefix |
| it.remove() |
| # Replace the node which contains ('.', 'function') with the |
| # function (to be consistent with the second part of the pattern) |
| dot.remove() |
| func.parent.replace(func) |
| |
| prefix = prefix or func.prefix |
| func.replace(Name(func.value[1:], prefix=prefix)) |
