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"""
The `compat` module provides support for backwards compatibility with older
versions of django/python, and compatibility wrappers around optional packages.
"""
# handle different QuerySet representations
def queryset_to_value_list(queryset):
assert isinstance(queryset, str)
# django 1.10 introduces syntax "<QuerySet [(#1), (#2), ...]>"
# we extract only the list of tuples from the string
idx_bracket_open = queryset.find(u'[')
idx_bracket_close = queryset.rfind(u']')
return queryset[idx_bracket_open:idx_bracket_close + 1]
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