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Bookmark or Share- Filtering a list of strings based on contents - Stack OverflowGiven the list ['a','ab','abc','bac'], I want to compute a list with strings that have 'ab' in them. I.e. the result is ['ab','abc'].
- Best way to remove elements from a list - Stack OverflowThis makes indexing a list a[i] an operation whose cost is independent of the size of the list or the value of the index. When items are appended or inserted, the array of references is resized. Some algorithm is applied to improve the performance of appending items repeatedly; when the array must be grown, some extra space is allocated so the ...
- How do I subtract one list from another? - Stack OverflowNote: This does require the values to be hashable, but any solution that doesn't require hashable objects either isn't general purpose (e.g. can count ints into fixed length array) or has to do more than O(m + n) work (e.g. the next best big-O would be to make a sorted list of unique value/count pairs, changing O(1) dict lookups into O(log n ...
- python - How to get item's position in a list? - Stack Overflowif l[i] == num: print(i) Explanation: Taken a list of integer "l" (separated by commas) in line 1. Taken a integer "num" in line 2. Used for loop in line 3 to traverse inside the list and checking if numbers (of the list) meets the given number (num) then it will print the index of the number inside the list.
- How can I pass a list as a command-line argument with argparse?1. You can parse the list as a string and use of the eval builtin function to read it as a list. In this case, you will have to put single quotes into double quote (or the way around) in order to ensure successful string parse. # declare the list arg as a string. parser.add_argument('-l', '--list', type=str) # parse.
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