Python Language Basics, IPython, and Jupyter Notebooks

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Questions

Question 1

According to the chapter, how does the Python interpreter execute a program?

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Question 2

What is the primary method described for running a Python script named 'hello_world.py' from the command line?

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Question 3

What is the file extension of a self-contained Jupyter notebook file?

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Question 4

In IPython, how can you access general information about an object, such as a variable 'b', including its type and docstring?

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Question 5

What is the purpose of using whitespace (tabs or spaces) in Python, as described in the section on Language Semantics?

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Question 6

What happens when you execute 'a.append(4)' where 'a' is a list and 'b = a' has been previously executed?

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Question 7

What is the defining characteristic of a 'strongly typed' language like Python, according to the chapter?

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Question 8

Which of the following data types is described as immutable in Python?

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Question 9

What is the result of integer division for the expression '3 / 2' in modern Python?

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Question 10

How do you create a multiline string in Python?

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Question 11

What is the purpose of the 'r' prefix before a string literal, for example, r'this\has\no\special\characters'?

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Question 12

Which method should be used to convert a Unicode string into its UTF-8 bytes representation?

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Question 13

In Python, what is the numerical value of 'True' when it is converted to an integer?

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Question 14

What is the Python keyword for the null value type?

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Question 15

What does the 'strftime' method of a datetime object do?

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Question 16

What is the result type when you subtract one datetime object from another, such as 'dt2 - dt'?

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Question 17

In a Python 'if/elif/else' structure, what happens when a compound condition like 'if a < b or c > d:' is evaluated and the first part ('a < b') is True?

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Question 18

What is the purpose of the 'continue' keyword within a for loop?

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Question 19

What is the primary function of the 'pass' statement in Python?

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Question 20

The 'range' function generates a sequence of evenly spaced integers. What does the output of 'range(10)' represent?

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Question 21

What is the output of the code `list(range(0, 20, 2))`?

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Question 22

What result does the expression `4 > 3 > 2 > 1` produce in Python?

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Question 23

Which of the following books is recommended in the chapter to deepen one's knowledge of the Python language?

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Question 24

In the context of IPython, what does the term 'object introspection' refer to?

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Question 25

What is the purpose of the wildcard search `np.*load*?` in IPython?

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Question 26

What does the concept 'everything is an object' mean in Python's object model?

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Question 27

What is the term for functions that are attached to an object and have access to its internal contents?

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Question 28

The term 'binding' in Python is used as another name for what action?

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Question 29

What is the purpose of the `isinstance` function?

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Question 30

What is the concept of 'duck typing'?

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Question 31

How can you give an imported module a different variable name in your code?

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Question 32

What is the difference between the `is` operator and the `==` operator when comparing two variables `a` and `c`?

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Question 33

What is the recommended way to handle potential side effects when writing a function?

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Question 34

Which of the following is NOT one of the standard Python scalar types listed in Table 2-2?

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Question 35

What is the result of applying the `str()` function to the float `5.6`?

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Question 36

In the string format method, what does the specifier `{0:.2f}` mean?

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Question 37

Which string formatting feature was introduced in Python 3.6 to make creating formatted strings more convenient?

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Question 38

What will `bool(0)` evaluate to?

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Question 39

In the example `dt.replace(minute=0, second=0)`, where `dt` is a datetime object, is the original `dt` object modified?

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Question 40

How many lines of text does the string `c` contain in the following code? `c = """ This is a longer string that spans multiple lines """`

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Question 41

What is slicing in Python?

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Question 42

What does the code `s = '12\\34'; print(s)` output?

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Question 43

What are the two Boolean values in Python?

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Question 44

What is a common default value for function arguments in Python, as shown in the `add_and_maybe_multiply` example?

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Question 45

What are the three main types provided by the built-in Python `datetime` module mentioned in the text?

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Question 46

What is the output of the following code? `sequence = [1, 2, 0, 4, 6, 5, 2, 1]; total_until_5 = 0; for value in sequence: if value == 5: break; total_until_5 += value;` What is the final value of `total_until_5`?

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Question 47

What does the code `for i in range(4): for j in range(4): if j > i: break; print((i, j))` produce?

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Question 48

What is the behavior of a `while` loop in Python?

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Question 49

What is the common use of the `range` function when iterating through sequences, as demonstrated in the text?

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Question 50

A user wants to sum all numbers from 0 to 99,999 that are multiples of 3 or 5. What is the memory-usage advantage of using `range(100_000)` in a for loop for this task, as mentioned in the text?

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