Dynamic Typing in python | why everyone is learning python | Thinkcloudly — Transcript

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1. 0:00[music]
2. 0:07>> Let's continue.
3. 0:08What is a dynamically typed language?
4. 0:11First, let's understand what is
5. 0:13statically typed language is.
6. 0:17In a statically typed language like
7. 0:20Java, C++, or C#.
8. 0:23We specify the type when we create a
9. 0:26variable.
10. 0:28If you notice here,
11. 0:30int age equals to 24.
12. 0:32We need to mention here
13. 0:34what type of data this age variable is
14. 0:37going to store. So, 24 is integer type.
15. 0:40So, that's why we have to mention here
16. 0:42int.
17. 0:43Same.
18. 0:44Delhi
19. 0:45is a string type of data.
20. 0:47So, the city variable is going to store
21. 0:50Delhi, which is of a string type. And
22. 0:52that you have to mention.
23. 0:54So,
24. 0:55but in Python,
25. 0:57you do not need to specify anything.
26. 1:01In Python, you do not need to specify
27. 1:05anything.
28. 1:06Directly
29. 1:07create the variable, store the data.
30. 1:10Done.
31. 1:11Then, how memory management happens?
32. 1:13Because integer take different type of
33. 1:16memory to store.
34. 1:17String take different type of memory,
35. 1:19different size of memory to store.
36. 1:21So, Python says, "User, you just create
37. 1:25a variable, store the data. Rest
38. 1:27everything, user, I will take care. How
39. 1:30much data, how much size is required, I
40. 1:33will take care.
41. 1:35When to create, when to destroy, I will.
42. 1:38You just store the data into it."
43. 1:42So, very simply,
44. 1:44Python is dynamically means
45. 1:46at the time of run,
46. 1:49the memory will get allocated in Python.
47. 1:53Okay?
48. 1:54Next, data types.
49. 1:57So, here if you see, first question
50. 1:59arises, what is a data type?
51. 2:02Before that, we have to understand what
52. 2:04is data.
53. 2:06Data is like, you say,
54. 2:08someone's information.
55. 2:10For example, someone's name, age,
56. 2:12address,
57. 2:13everything is data, right?
58. 2:15So, here if you see, we are storing 100
59. 2:18into a variable.
60. 2:20What kind of data it is?
61. 2:22How to get the data type of data?
62. 2:25I am saying that 100 is an integer. What
63. 2:27is a proof
64. 2:28that it is an integer?
65. 2:30Let's see that proof.
66. 2:32I will just move on to my VS code.
67. 2:35So, let's move on
68. 2:37here to my VS.
69. 2:43Now,
70. 2:45let's say,
71. 2:46I am taking one variable, data.
72. 2:49Same as slide. I'm storing 100.
73. 2:53If I'm going to print this data,
74. 2:54obviously, it will print me 100.
75. 2:57The question is same.
76. 2:59How do I trust it is integer?
77. 3:01Simple.
78. 3:03How we find it out the memory location
79. 3:06address using ID function? So, to get
80. 3:09the type of the data in Python, we have
81. 3:12a function that is type. T Y P E, type
82. 3:17function.
83. 3:18Here if you see, integer.
84. 3:21This is integer.
85. 3:22The proof is that 100 is integer.
86. 3:26Similarly,
87. 3:27I have another data, let's say, John.
88. 3:30Obviously, John is a string. So, if I am
89. 3:34going to print this John,
90. 3:36type of John is going to be STR, that
91. 3:40will be string. So, I can give here
92. 3:43data.
93. 3:45Okay, let's run it.
94. 3:47So, it should be string.
95. 3:49Let's do one thing. I will just declare,
96. 3:53I will change the value of this data.
97. 3:55So, you see now I'm giving 3.14. It is
98. 3:58float, agree? So, it should show float
99. 4:01now. So, you see some of the data types
100. 4:04I showed you how to get the data type in
101. 4:07Python. You can get the data type in
102. 4:09Python of a data using type function.
103. 4:14So, here now if you go back we are
104. 4:16looking on integer data, string data,
105. 4:19and anything. So, these are some of the
106. 4:21commons data types available in Python.
107. 4:24Integer, strings, float, bool means true
108. 4:26or false. List we have that is ordered
109. 4:29collection. Apart from it, we have
110. 4:31tuple, sets, dictionary, everything is
111. 4:34available in Python.
112. 4:37All do have separate separate uh
113. 4:39varieties. All do have separate separate
114. 4:41you say functionalities and importance
115. 4:43to utilize. Let
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