Method of List
| Method Name | Use | Explanation |
|---|---|---|
| append | alist.append(item) | Adds a new item to the end of a list |
| insert | alist.insert(i,item) | Inserts an item at the ith position in a list |
| pop | alist.pop() | Removes and returns the last item in a list |
| pop | alist.pop(i) | Removes and returns the ith item in a list |
| sort | alist.sort() | Modifies a list to be sorted |
| reverse | alist.reverse() | Modifies a list to be in reverse order |
| del | del alist[i] | Deletes the item in the ith position |
| index | alist.index(item) | Returns the index of the first occurrence of item |
| count | alist.count(item) | Returns the number of occurrences of item |
| remove | alist.remove(item) | Removes the first occurrence of item |
Method of String
| Method Name | Use | Explanation |
|---|---|---|
| center | astring.center(w) | Returns a string centered in a field of size w |
| count | astring.count(item) | Returns the number of occurrences of item in the string |
| ljust | astring.ljust(w) | Returns a string left-justified in a field of size w |
| lower | astring.lower() | Returns a string in all lowercase |
| rjust | astring.rjust(w) | Returns a string right-justified in a field of size w |
| find | astring.find(item) | Returns the index of the first occurrence of item |
| split | astring.split(schar) | Splits a string into substrings at schar |
Method of Set
| Operation Name | Operator | Explanation |
|---|---|---|
| membership | in | Set membership |
| length | len | Returns the cardinality of the set |
| 'bar' | aset 'bar' otherset | Returns a new set with all elements from both sets |
| & | aset & otherset | Returns a new set with only those elements common to both sets |
| - | aset - otherset | Returns a new set with all items from the first set not in second |
| <= | aset <= otherset | Asks whether all elements of the first set are in the second |
| Method Name | Use | Explanation |
|---|---|---|
| union | aset.union(otherset) | Returns a new set with all elements from both sets |
| intersection | aset.intersection(otherset) | Returns a new set with only those elements common to both sets |
| difference | aset.difference(otherset) | Returns a new set with all items from first set not in second |
| issubset | aset.issubset(otherset) | Asks whether all elements of one set are in the other |
| add | aset.add(item) | Adds item to the set |
| remove | aset.remove(item) | Removes item from the set |
| pop | aset.pop() | Removes an arbitrary element from the set |
| clear | aset.clear() | Removes all elements from the set |
Method of Dictionary
| Operation Name | Operator | Explanation |
|---|---|---|
| [] | myDict[k] | Returns the value associated with k, otherwise its an error |
| in | key in adict | Returns True if key is in the dictionary, False otherwise |
| del | del adict[key] | Removes the entry from the dictionary |
| Method Name | Use | Explanation |
|---|---|---|
| keys | adict.keys() | Returns the keys of the dictionary in a dict_keys object |
| values | adict.values() | Returns the values of the dictionary in a dict_values object |
| items | adict.items() | Returns the key-value pairs in a dict_items object |
| get | adict.get(k) | Returns the value associated with k, None otherwise |
| get | adict.get(k,alt) | Returns the value associated with k, alt otherwise |
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