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sheet.md

@@ -8,6 +8,7 @@ Scientific Python Cheatsheet
         - [Types](#types)
         - [Lists](#lists)
         - [Dictionaries](#dictionaries)
+        - [Sets](#sets)
         - [Strings](#strings)
         - [Operators](#operators)
         - [Control Flow](#control-flow)
@@ -68,18 +69,54 @@ g = c[-1]                          # access last element
 h = ['re', 'bl'] + ['gr']          # list concatenation
 i = ['re'] * 5                     # repeat a list
 ['re', 'bl'].index('re')           # returns index of 're'
+a.append('yellow')                 # add new element to end of list
+a.extend(b)                        # add elements from list `b` to end of list `a`
+a.insert(1, 'yellow')              # insert element in specified position
 're' in ['re', 'bl']               # true if 're' in list
+'fi' not in ['re', 'bl']           # true if 'fi' not in list
 sorted([3, 2, 1])                  # returns sorted list
+a.pop(2)                           # remove and return item at index (default last)
 ```
 
 ### Dictionaries
 
 ```python
 a = {'red': 'rouge', 'blue': 'bleu'}         # dictionary
 b = a['red']                                 # translate item
+'red' in a                                   # true if dictionary a contains key 'red'
 c = [value for key, value in a.items()]      # loop through contents
 d = a.get('yellow', 'no translation found')  # return default
 a.setdefault('extra', []).append('cyan')     # init key with default
+a.update({'green': 'vert', 'brown': 'brun'}) # update dictionary by data from another one
+a.keys()                                     # get list of keys
+a.values()                                   # get list of values
+a.items()                                    # get list of key-value pairs
+del a['red']                                 # delete key and associated with it value
+a.pop('blue')                                # remove specified key and return the corresponding value
+```
+
+
+### Sets
+
+```python
+a = {1, 2, 3}                                # initialize manually
+b = set(range(5))                            # initialize from iteratable
+a.add(13)                                    # add new element to set
+a.discard(13)                                # discard element from set
+a.update([21, 22, 23])                       # update set with elements from iterable
+a.pop()                                      # remove and return an arbitrary set element
+2 in {1, 2, 3}                               # true if 2 in set
+5 in {1, 2, 3}                               # true if 5 not in set
+a.issubset(b)                                # test whether every element in a is in b
+a <= b                                       # issubset in operator form
+a.issuperset(b)                              # test whether every element in b is in a
+a >= b                                       # issuperset in operator form
+a.intersection(b)                            # return the intersection of two sets as a new set
+a.difference(b)                              # return the difference of two or more sets as a new set
+a - b                                        # difference in operator form
+a.symmetric_difference(b)                    # return the symmetric difference of two sets as a new set
+a.union(b)                                   # return the union of sets as a new set
+c = frozenset()                              # the same as set but immutable
 ```
 
 ### Strings
@@ -109,8 +146,11 @@ abs(a)            # absolute value
 2 < 1             # smaller
 1 != 2            # not equal
 1 != 2 and 2 < 3  # logical AND
+a & b             # logical AND
 1 != 2 or 2 < 3   # logical OR
+a | b             # logical OR
 not 1 == 2        # logical NOT
+a ^ b             # logical XOR
 'a' in b          # test if a is in b
 a is b            # test if objects point to the same memory (id)
 ```