Exercise --python data type 2

First, the role of the five types of data of the python brief, defined manner using the method

1. Digital Type

   • Integer

     Role: Description ID, Student ID, etc.

     Defined way

     a = int(123)

   • Float

     Role: height description, salary, etc.

     Defined way

     a = float(20000.0)

2. String type

   Role: Description name, hobbies, etc.

   Defined way

   a = 'byx'
   b = "byx"
   c = '''
   a
   b
   c
   '''

   Instructions

   a = 'my name is '
   b = 'byx'
   print(a + b) # 'my name is byx'
   print(b * 2) # 'byxbyx'
   print(a > b) # True

3. List

   Action: is capable of storing a plurality of sets of data of any type, and can be easily taken out one or more.

   It is defined by: a plurality of data separated by commas within brackets.

   Instructions

   l = [1, 2.3, 'a', ['b', 'c']]

4. dictionary

   Action: is capable of storing a plurality of sets of data, there are stored data corresponding to the description

   Is defined by: a plurality of memory elements braces, elements are key: value format stored key-value pairs separated by commas

   Instructions

   dic = {'a': 1, 'b': 2}
   dic = dict(a = 1, b = 2, c = 3)
   print(dic[a]) # 1

5. Boolean

   Role: right or wrong thing or feasibility logo

   Use

   tag = True
   tag = False

Second, the line of code to achieve the following function codes

x = 10
y = 10 
z = 10

x = y = z = 10

Third, the exchange of two ways to write x, y values

x = 10
y = 20

z = x 
x = y
y = z

x, y = y, x

Fourth, write a line of code in the first 2,3-loving nick

nick_info_dict = {
'name':'nick',
'age':'18',
'height':180,
'weight':140,
'hobby_list':['read','run','music','code'],
}

res1, res2 = nick_info_dict['hobby_list'][1], nick_info_dict['hobby_list'][2]

Fifth, formatted output using the following three ways output

name = 'byx'
height = 180
weight = 140
# "My name is 'Nick', my height is 180, my weight is 140"

print(f'My name is {name}, my height is {height}, my weight is {weight}')
print('My name is %s, my height is %s, my weight is %s' % (name, height, weight))
print('My name is {}, my height is {}, my weight is {}'.format(name, height, weight))