def remove_list_from_list(input_list,
list_toremove_src,
warning=True,
debug=True):
'''
remove a list "list_toremove_src" from a list "list_src" if found, skip if not found
parameteters:
input_list: a list to be removed from
list_toremove_src: a list to be removed
outputs:
list_remained: a list of remaining elements after removal
list_removed: a list of elements to be successfully removed
(as some elements in list_toremove_src may not found in list_src, where the removal fails)
'''
list_remained = safe_list(input_list, warning=warning, debug=debug)
list_toremove = safe_list(list_toremove_src, warning=warning, debug=debug)
list_removed = []
for item in list_toremove:
try:
list_remained.remove(item)
list_removed.append(item)
except ValueError:
if warning:
print(
'Warning!!!!!! Item to remove is not in the list. Remove operation is not done.'
)
return list_remained, list_removed
def remove_unique_item_from_list(input_list, item, warning=True, debug=True):
'''
remove all instances of a single item from a list
parameters:
input_list: a list to be removed from
outputs:
list_remained: a list of remaining elements after removal
count_removal: number of times the requested item to be removed
'''
list_remained = safe_list(input_list, warning=warning, debug=debug)
count_removal = 0
while 1:
try:
list_remained.remove(item)
count_removal += 1
except ValueError:
if warning and count_removal == 0:
print(
'Warning!!!!!! Item to remove is not in the list. Remove operation is not done.'
)
break
return list_remained, count_removal
def find_unique_common_from_lists(input_list1,
input_list2,
warning=True,
debug=True):
'''
find common items from 2 lists, the returned elements are unique. repetitive items will be ignored
if the common items in two elements are not in the same order, the outputs follows the order in the first list
parameters:
input_list1, input_list2: two input lists
outputs:
list_common: a list of elements existing both in list_src1 and list_src2
'''
input_list1 = safe_list(input_list1, warning=warning, debug=debug)
input_list2 = safe_list(input_list2, warning=warning, debug=debug)
common_list = list(set(input_list1).intersection(input_list2))
return common_list
def remove_list_from_index(list_src, list_index_src, warning=True, debug=True):
'''
remove a list "list_to_remove" from a list "list_all_src" based on value
'''
if debug:
assert islist(list_src) and islist(
list_index_src), 'input lists are not valid'
input_list = safe_list(list_src, warning=warning, debug=debug)
index_list = safe_list(list_index_src, warning=warning, debug=debug)
index_list.sort(reverse=True)
for item_index in index_list:
try:
del input_list[item_index]
except ValueError:
if warning:
print(
'Warning!!!!!! Item to remove is not in the list. Remove operation is not done.'
)
return input_list
def reverse_list(input_list, warning=True, debug=True):
'''
reverse the order of a list
parameters:
input_list: a list
outputs:
reversed_list: the list in a reverse order
'''
input_list = safe_list(input_list, warning=warning, debug=debug)
reversed_list = input_list[::-1]
return reversed_list