dict Use

dict Extended dictionary length in ( many-ways )

dict_var = {
    1: 2, 3: 4}
dict_var.update(((5, 6), [7, 8]))
dict_var.update(qwe=1)
dict_var.setdefault('q', 'e')
dict_var[9] = 10
print(dict_var)
# {1: 2, 3: 4, 5: 6, 7: 8, 'qwe': 1, 'q': 'e', 9: 10}

dict Get all the key, Get all value, Get all item

dict_var = {
    1: 2, 3: 4}
var1 = dict_var.keys()
var2 = dict_var.values()
var3 = dict_var.items()
print(var1) # dict_keys([1, 3])
print(var2) # dict_values([2, 4])
print(var3) # dict_items([(1, 2), (3, 4)])

dict Through a nonexistent key To get the value ( No error is required )

dict_var = {
    1: 2, 3: 4}
var1 = dict_var.setdefault(4)
print(var1) # None
var2 = dict_var.get(4)
print(var2) # None

set Use

Define empty sets

set_var = set()
print(set_var) # set()

set in , Difference set , Ask for a collection , Find the intersection （ Requires operation on the original set ）

set_var1 = {
    1, 2, 3, 4}
set_var2 = {
    1, 3, 5, 7}
# set_var1.difference_update(set_var2)
# print(set_var1) # {2, 4}

# set_var1.intersection_update(set_var2)
# print(set_var1) # {1, 3}

set_var2.update(set_var1)
print(set_var2) # {1, 2, 3, 4, 5, 7}

Add an element

set_var1 = {
    1, 2, 3, 4}
set_var1.add(5)
print(set_var1) # {1, 2, 3, 4, 5}

Delete an element ( Using a variety of methods )

set_var1 = {
    1, 2, 3, 4}
set_var1.discard(1)
print(set_var1) # {2, 3, 4}
set_var1.remove(2)
print(set_var1) # {3, 4}
var = set_var1.pop()
print(set_var1) # {4}

Data type conversion

1. Will float , String to integer
2. The integer , String to floating point
3. Binary , octal ,16 Base to 10 Base number
4. take 10 Base to zero , Binary system , octal ,16 Base number
5. Convert string to byte
6. Convert bytes to strings
7. take ascii Code to string
8. Converts a string to ascii code

print(int(1.1)) # 1
print(int("1")) # 1
print(float(1)) # 1.0
print(float("1.3")) # 1.3
print(int("0b100", base=2))
print(int("0o100", base=8))
print(int("0x100", base=16))
print(bin(4))
print(oct(64))
print(hex(256))
print(bytes(' Assad ', encoding='UTF-8'))
print(str(b'\xe9\x98\xbf\xe8\x90\xa8\xe5\xbe\xb7', encoding="UTF-8"))
print(chr(97))
print(ord('a'))