Python - List of Files: Functions, Modules and Files - remove method
Head First Python: A Learner’s Guide to the Fundamentals of Python Programming, A Brain-Friendly Guide、 Paul Barry(著)、 O’Reilly Mediaの Chapter 4.(List of Files: Functions, Modules & Files)、EXERCISE(226/682)の解答を求めてみる。
Jupyter(コード、入出力結果)
Files.ipynb
import os
from swimclub import FOLDER
swim_files = os.listdir(FOLDER)
swim_files
['Hannah-13-100m-Free.txt',
'Darius-13-100m-Back.txt',
'Owen-15-100m-Free.txt',
'Mike-15-100m-Free.txt',
'Hannah-13-100m-Back.txt',
'Mike-15-100m-Back.txt',
'Mike-15-100m-Fly.txt',
'Abi-10-50m-Back.txt',
'Ruth-13-200m-Free.txt',
'.DS_Store',
'Tasmin-15-100m-Back.txt',
'Erika-15-100m-Free.txt',
'Ruth-13-200m-Back.txt',
'Abi-10-50m-Free.txt',
'Maria-9-50m-Free.txt',
'Elba-14-100m-Free.txt',
'Tasmin-15-100m-Free.txt',
'Abi-10-100m-Back.txt',
'Abi-10-50m-Breast.txt',
'Mike-15-200m-IM.txt',
'Ali-12-100m-Back.txt',
'Ruth-13-100m-Back.txt',
'Chris-17-100m-Back.txt',
'Ali-12-100m-Free.txt',
'Darius-13-100m-Breast.txt',
'Ruth-13-100m-Free.txt',
'Aurora-13-50m-Free.txt',
'Katie-9-100m-Breast.txt',
'Alison-14-100m-Breast.txt',
'Ruth-13-400m-Free.txt',
'Emma-13-100m-Free.txt',
'Calvin-9-50m-Fly.txt',
'Darius-13-100m-Fly.txt',
'Mike-15-200m-Free.txt',
'Emma-13-100m-Breast.txt',
'Tasmin-15-100m-Breast.txt',
'Blake-15-100m-Free.txt',
'Abi-10-100m-Breast.txt',
'Chris-17-100m-Breast.txt',
'Blake-15-100m-Back.txt',
'Bill-18-200m-Back.txt',
'Darius-13-200m-IM.txt',
'Dave-17-100m-Free.txt',
'Alison-14-100m-Free.txt',
'Lizzie-14-100m-Free.txt',
'Katie-9-50m-Fly.txt',
'Katie-9-50m-Breast.txt',
'Katie-9-50m-Back.txt',
'Lizzie-14-100m-Back.txt',
'Tasmin-15-200m-Breast.txt',
'Katie-9-50m-Free.txt',
'Dave-17-200m-Back.txt',
'Erika-15-200m-Breast.txt',
'Calvin-9-50m-Back.txt',
'Calvin-9-50m-Free.txt',
'Carl-15-100m-Back.txt',
'Bill-18-100m-Back.txt',
'Katie-9-100m-Free.txt',
'Blake-15-100m-Fly.txt',
'Erika-15-100m-Breast.txt',
'Katie-9-100m-Back.txt']
sorted(swim_files)
['.DS_Store',
'Abi-10-100m-Back.txt',
'Abi-10-100m-Breast.txt',
'Abi-10-50m-Back.txt',
'Abi-10-50m-Breast.txt',
'Abi-10-50m-Free.txt',
'Ali-12-100m-Back.txt',
'Ali-12-100m-Free.txt',
'Alison-14-100m-Breast.txt',
'Alison-14-100m-Free.txt',
'Aurora-13-50m-Free.txt',
'Bill-18-100m-Back.txt',
'Bill-18-200m-Back.txt',
'Blake-15-100m-Back.txt',
'Blake-15-100m-Fly.txt',
'Blake-15-100m-Free.txt',
'Calvin-9-50m-Back.txt',
'Calvin-9-50m-Fly.txt',
'Calvin-9-50m-Free.txt',
'Carl-15-100m-Back.txt',
'Chris-17-100m-Back.txt',
'Chris-17-100m-Breast.txt',
'Darius-13-100m-Back.txt',
'Darius-13-100m-Breast.txt',
'Darius-13-100m-Fly.txt',
'Darius-13-200m-IM.txt',
'Dave-17-100m-Free.txt',
'Dave-17-200m-Back.txt',
'Elba-14-100m-Free.txt',
'Emma-13-100m-Breast.txt',
'Emma-13-100m-Free.txt',
'Erika-15-100m-Breast.txt',
'Erika-15-100m-Free.txt',
'Erika-15-200m-Breast.txt',
'Hannah-13-100m-Back.txt',
'Hannah-13-100m-Free.txt',
'Katie-9-100m-Back.txt',
'Katie-9-100m-Breast.txt',
'Katie-9-100m-Free.txt',
'Katie-9-50m-Back.txt',
'Katie-9-50m-Breast.txt',
'Katie-9-50m-Fly.txt',
'Katie-9-50m-Free.txt',
'Lizzie-14-100m-Back.txt',
'Lizzie-14-100m-Free.txt',
'Maria-9-50m-Free.txt',
'Mike-15-100m-Back.txt',
'Mike-15-100m-Fly.txt',
'Mike-15-100m-Free.txt',
'Mike-15-200m-Free.txt',
'Mike-15-200m-IM.txt',
'Owen-15-100m-Free.txt',
'Ruth-13-100m-Back.txt',
'Ruth-13-100m-Free.txt',
'Ruth-13-200m-Back.txt',
'Ruth-13-200m-Free.txt',
'Ruth-13-400m-Free.txt',
'Tasmin-15-100m-Back.txt',
'Tasmin-15-100m-Breast.txt',
'Tasmin-15-100m-Free.txt',
'Tasmin-15-200m-Breast.txt']
help(swim_files)
Help on list object:
class list(object)
| list(iterable=(), /)
|
| Built-in mutable sequence.
|
| If no argument is given, the constructor creates a new empty list.
| The argument must be an iterable if specified.
|
| Methods defined here:
|
| __add__(self, value, /)
| Return self+value.
|
| __contains__(self, key, /)
| Return bool(key in self).
|
| __delitem__(self, key, /)
| Delete self[key].
|
| __eq__(self, value, /)
| Return self==value.
|
| __ge__(self, value, /)
| Return self>=value.
|
| __getattribute__(self, name, /)
| Return getattr(self, name).
|
| __getitem__(self, index, /)
| Return self[index].
|
| __gt__(self, value, /)
| Return self>value.
|
| __iadd__(self, value, /)
| Implement self+=value.
|
| __imul__(self, value, /)
| Implement self*=value.
|
| __init__(self, /, *args, **kwargs)
| Initialize self. See help(type(self)) for accurate signature.
|
| __iter__(self, /)
| Implement iter(self).
|
| __le__(self, value, /)
| Return self<=value.
|
| __len__(self, /)
| Return len(self).
|
| __lt__(self, value, /)
| Return self<value.
|
| __mul__(self, value, /)
| Return self*value.
|
| __ne__(self, value, /)
| Return self!=value.
|
| __repr__(self, /)
| Return repr(self).
|
| __reversed__(self, /)
| Return a reverse iterator over the list.
|
| __rmul__(self, value, /)
| Return value*self.
|
| __setitem__(self, key, value, /)
| Set self[key] to value.
|
| __sizeof__(self, /)
| Return the size of the list in memory, in bytes.
|
| append(self, object, /)
| Append object to the end of the list.
|
| clear(self, /)
| Remove all items from list.
|
| copy(self, /)
| Return a shallow copy of the list.
|
| count(self, value, /)
| Return number of occurrences of value.
|
| extend(self, iterable, /)
| Extend list by appending elements from the iterable.
|
| index(self, value, start=0, stop=9223372036854775807, /)
| Return first index of value.
|
| Raises ValueError if the value is not present.
|
| insert(self, index, object, /)
| Insert object before index.
|
| pop(self, index=-1, /)
| Remove and return item at index (default last).
|
| Raises IndexError if list is empty or index is out of range.
|
| remove(self, value, /)
| Remove first occurrence of value.
|
| Raises ValueError if the value is not present.
|
| reverse(self, /)
| Reverse *IN PLACE*.
|
| sort(self, /, *, key=None, reverse=False)
| Sort the list in ascending order and return None.
|
| The sort is in-place (i.e. the list itself is modified) and stable (i.e. the
| order of two equal elements is maintained).
|
| If a key function is given, apply it once to each list item and sort them,
| ascending or descending, according to their function values.
|
| The reverse flag can be set to sort in descending order.
|
| ----------------------------------------------------------------------
| Class methods defined here:
|
| __class_getitem__(object, /)
| See PEP 585
|
| ----------------------------------------------------------------------
| Static methods defined here:
|
| __new__(*args, **kwargs)
| Create and return a new object. See help(type) for accurate signature.
|
| ----------------------------------------------------------------------
| Data and other attributes defined here:
|
| __hash__ = None
dir(swim_files)
['__add__',
'__class__',
'__class_getitem__',
'__contains__',
'__delattr__',
'__delitem__',
'__dir__',
'__doc__',
'__eq__',
'__format__',
'__ge__',
'__getattribute__',
'__getitem__',
'__getstate__',
'__gt__',
'__hash__',
'__iadd__',
'__imul__',
'__init__',
'__init_subclass__',
'__iter__',
'__le__',
'__len__',
'__lt__',
'__mul__',
'__ne__',
'__new__',
'__reduce__',
'__reduce_ex__',
'__repr__',
'__reversed__',
'__rmul__',
'__setattr__',
'__setitem__',
'__sizeof__',
'__str__',
'__subclasshook__',
'append',
'clear',
'copy',
'count',
'extend',
'index',
'insert',
'pop',
'remove',
'reverse',
'sort']
help(swim_files.remove)
Help on built-in function remove:
remove(value, /) method of builtins.list instance
Remove first occurrence of value.
Raises ValueError if the value is not present.
len(swim_files)
61
swim_files.remove('.DS_Store')
len(swim_files)
60
sorted(swim_files)[0]
'Abi-10-100m-Back.txt'