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import random
import itertools
def to_list(obj):
if obj is None:
return None
elif hasattr(obj, '__iter__') and not isinstance(obj, str):
try:
return list(obj)
except:
return [obj]
else:
return [obj]
def convert_lists_to_record(*list_objs, delimiter=None):
assert len(list_objs) >= 1, 'list_objs length must >= 1.'
delimiter = delimiter or ','
assert isinstance(list_objs[0], (tuple, list))
number = len(list_objs[0])
for item in list_objs[1:]:
assert isinstance(item, (tuple, list))
assert len(item) == number, '{} != {}'.format(len(item), number)
records = []
record_list = zip(*list_objs)
for record in record_list:
record_str = [str(item) for item in record]
records.append(delimiter.join(record_str))
return records
def shuffle_table(*table):
"""
Notes:
table can be seen as list of list which have equal items.
"""
shuffled_list = list(zip(*table))
random.shuffle(shuffled_list)
tuple_list = zip(*shuffled_list)
return [list(item) for item in tuple_list]
def transpose_table(table):
"""
Notes:
table can be seen as list of list which have equal items.
"""
m, n = len(table), len(table[0])
return [[table[i][j] for i in range(m)] for j in range(n)]
def concat_list(in_list):
"""Concatenate a list of list into a single list.
Args:
in_list (list): The list of list to be merged.
Returns:
list: The concatenated flat list.
References:
mmcv.concat_list
"""
return list(itertools.chain(*in_list))
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