def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
"""
Parameters
----------
Returns
-------
"""
if len(left_keys) != len(right_keys):
raise AssertionError('left_key and right_keys must be the same length')
left_labels = []
right_labels = []
group_sizes = []
for lk, rk in zip(left_keys, right_keys):
llab, rlab, count = _factorize_keys(lk, rk, sort=sort)
left_labels.append(llab)
right_labels.append(rlab)
group_sizes.append(count)
max_groups = long(1)
for x in group_sizes:
max_groups *= long(x)
if max_groups > 2**63: # pragma: no cover
left_group_key, right_group_key, max_groups = \
_factorize_keys(lib.fast_zip(left_labels),
lib.fast_zip(right_labels))
else:
left_group_key = get_group_index(left_labels, group_sizes)
right_group_key = get_group_index(right_labels, group_sizes)
left_group_key, right_group_key, max_groups = \
_factorize_keys(left_group_key, right_group_key, sort=sort)
# preserve left frame order if how == 'left' and sort == False
kwargs = {'sort': sort} if how == 'left' else {}
join_func = _join_functions[how]
return join_func(left_group_key, right_group_key, max_groups, **kwargs)
def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
"""
Parameters
----------
Returns
-------
"""
if len(left_keys) != len(right_keys):
raise AssertionError('left_key and right_keys must be the same length')
left_labels = []
right_labels = []
group_sizes = []
for lk, rk in zip(left_keys, right_keys):
llab, rlab, count = _factorize_keys(lk, rk, sort=sort)
left_labels.append(llab)
right_labels.append(rlab)
group_sizes.append(count)
max_groups = long(1)
for x in group_sizes:
max_groups *= long(x)
if max_groups > 2 ** 63: # pragma: no cover
left_group_key, right_group_key, max_groups = \
_factorize_keys(lib.fast_zip(left_labels),
lib.fast_zip(right_labels))
else:
left_group_key = get_group_index(left_labels, group_sizes)
right_group_key = get_group_index(right_labels, group_sizes)
left_group_key, right_group_key, max_groups = \
_factorize_keys(left_group_key, right_group_key, sort=sort)
# preserve left frame order if how == 'left' and sort == False
kwargs = {'sort':sort} if how == 'left' else {}
join_func = _join_functions[how]
return join_func(left_group_key, right_group_key, max_groups, **kwargs)
def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
"""
Parameters
----------
Returns
-------
"""
if not ((len(left_keys) == len(right_keys))):
raise AssertionError()
left_labels = []
right_labels = []
group_sizes = []
for lk, rk in zip(left_keys, right_keys):
llab, rlab, count = _factorize_keys(lk, rk, sort=sort)
left_labels.append(llab)
right_labels.append(rlab)
group_sizes.append(count)
max_groups = long(1)
for x in group_sizes:
max_groups *= long(x)
if max_groups > 2**63: # pragma: no cover
left_group_key, right_group_key, max_groups = \
_factorize_keys(lib.fast_zip(left_labels),
lib.fast_zip(right_labels))
else:
left_group_key = get_group_index(left_labels, group_sizes)
right_group_key = get_group_index(right_labels, group_sizes)
left_group_key, right_group_key, max_groups = \
_factorize_keys(left_group_key, right_group_key, sort=sort)
join_func = _join_functions[how]
return join_func(left_group_key, right_group_key, max_groups)
def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
"""
Parameters
----------
Returns
-------
"""
if not ((len(left_keys) == len(right_keys))):
raise AssertionError()
left_labels = []
right_labels = []
group_sizes = []
for lk, rk in zip(left_keys, right_keys):
llab, rlab, count = _factorize_keys(lk, rk, sort=sort)
left_labels.append(llab)
right_labels.append(rlab)
group_sizes.append(count)
max_groups = 1L
for x in group_sizes:
max_groups *= long(x)
if max_groups > 2 ** 63: # pragma: no cover
left_group_key, right_group_key, max_groups = \
_factorize_keys(lib.fast_zip(left_labels),
lib.fast_zip(right_labels))
else:
left_group_key = get_group_index(left_labels, group_sizes)
right_group_key = get_group_index(right_labels, group_sizes)
left_group_key, right_group_key, max_groups = \
_factorize_keys(left_group_key, right_group_key, sort=sort)
join_func = _join_functions[how]
return join_func(left_group_key, right_group_key, max_groups)