day 004 jobs

The role of the five data types Python 1. Briefly, the defined manner using the method:

1. Digital Type

   Integer:

   Role: represents the person's age, all kinds of numbers, level

   Use:

   x = 1
   y = 2
   print(x + y)
   print(x - y)
   print(x * y)
   print(x / y)
   print(x % y)  # 取余
   print(x // y) # 取整
   print(x ** y) # 幂

   Definition method:

   age=18
   age=int(18)

   Float:

   Role: represents the height, weight, payroll

   Defined method:

   salary=3.2
   salary=float(3.2)

   Instructions:

   + - * / % // **

2. String type

   Role: represents the name of hobbies

   definition:

   name='nick'
   int_str=str(123)

   Instructions:

   Self string comparison logic + *

3. List

   Action: storing a plurality of (of any data type) element

   Definition: a plurality of spaced elements (of any data type) with a comma in []

   Instructions:

   hobby_list=['read','run','girl']
                  0      1     2
   print(bobby_list[1])

4. dictionary

   Action: storing a plurality of values, each value by the description but

   Definition: {} the plurality of keys separated by commas (described, string): the value (a specific value, can be any data type)

   Instructions:

   user_info={'name':'nick','gender':'male','age':19}
   print(user_info['name'])

5. Boolean

   Effect: Conditions for determination result

   Definitions: True, False usually not directly quoted, required logic operation result obtained

   Instructions:

   print(type(True))
   print(True)
   print(bool(0))
   print(bool('nick'))
   print(bool(1 > 2))
   print(bool(1 == 1))

   2. The following line of code to implement the functions of the code implementation:

x = 10
y = 10
z = 10
x=y=z=10

3. Write two ways exchange x, y values:

x = 10
y = 20
#第一种
m=x
x=y
y=x
#第二种
x,y=y,x

4. Remove the line of code nickof 3 interests:

nick_info_dict = {
'name':'nick',
'age':'18',
'height':180,
'weight':140,
'hobby_list':['read','run','music','code'],
}
print(nick_info_dict['hobby_list'][1],nick_info_dict['hobby_list'][2])

5. Use the formatted output of three ways to achieve the following outputs (name changed to his name, acquired modify height and weight, do not brazen)

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