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Chapter 6: Problem 9

When the random module is imported, what does it use as a seed value for random number generation?

Short Answer

Expert verified
Answer: The default seed value for random number generation in Python's random module is the current system time (time since the epoch: January 1, 1970, 00:00:00 (UTC)) when a seed value is not explicitly provided.

Step by step solution

01

1. Understanding Seed Value in Random Number Generation

In random number generation, the seed is an initial value used to generate a sequence of random numbers. Seeding ensures that the same sequence of random numbers is generated if the same seed value is used. This is useful for reproducing results and tests. If no seed value is provided, the generator uses a default seed value.
02

2. Python's Random Module

Python's random module is a built-in library used to generate random numbers. It provides various functions like randint, uniform, shuffle, and others to generate random numbers and sequences. When we import the random module, it automatically initializes the random number generator.
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3. Default Seed Value in Python's Random Module

When the random module is imported, if a seed value is not explicitly provided, the module uses the current system time (more specifically, the time since the epoch which is January 1, 1970, 00:00:00 (UTC)) as the default seed value. This ensures that every time we use the module, we get a different sequence of random numbers as the current time changes.
04

4. Seeding the Random Number Generator in Python

If you want to provide a specific seed value for the random number generator in Python, you can use the random.seed() function: import random random.seed(42) # This seeds the generator with the value 42 # Now the random number sequence generated will be the same every time this code is run.

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Most popular questions from this chapter

Look at the following function definition: def do_something(number): return number * 2 a. What is the name of the function? b. What does the function do? c. Given the function definition, what will the following statement display? print(do_something(10))

What does the following statement do? \(x=\) random.randint (1,100)

What is a library function?

Why are library functions like "black boxes"?

What is the purpose of the return statement in a function?
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