15 Python small case, learn these, Python Foundation has passed!

15 Python small case, do not know how much you will!

First, guess the number

1 to 4 How many three digits of a distinct and non-repeating number can be formed? What's the difference?

Analysis: Can be filled in hundreds, 10 digits, single digit numbers are 1, 2, 3, 4. Make all the permutations and then remove the permutations that do not meet the criteria.

Program Source code:

Second, the calculation of bonuses issued by the company

Analysis: Please use the axis to demarcation, positioning. Note that the bonus definition should be defined as the growth integral type.

Program Source code:

A city integer plus 100 is a complete square number, plus 168 is a complete square number, what is the number?

Analysis:

Program Source code:

Iv. Enter * YEAR * month * day to determine if this day is the first of the year?

Analysis: Take March 5 as an example, the first two months to add together, plus 5 days is the first day of this year, special cases leap years and enter the month greater than 2 o'clock to consider adding a day:

Program Source code:

The result of the above example output is:

Enter three integers x, y, Z, and turn these three numbers from small to large output

Analysis: We put the minimum number on X, first compare x with Y, if x>y the value of x and Y, and then compare X with Z, when x>z the value of x and z, so that x is the smallest.

Program Source code:

Vi. Fibonacci Sequence

Analysis: Fibonacci sequence (Fibonacci sequence), also known as the Golden Section, refers to a sequence of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 、......。

Mathematically, the faipot sequence is defined in a recursive way:

Program Source code:

Method One

Method Two

The above example outputs a 10th Fibonacci sequence with the result:

55

Method Three

The above program run output is:

[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]

Seven. Copy data from one list to another list

Program Analysis: Use list [:]

Program Source code:

The result of the above example output is:

[1, 2, 3]

Eight, output 9*9 multiplication table

Analysis: Branch and column considerations, a total of 9 rows of 9 columns, I control row, J control column.

Source:

The result of the above example output is:

Nine, pause one second output

Analysis: Using the Sleep () function of the time module

Program Source code:

The above example output is (there will be a pause effect):

2 B

1 A

Ten, pause the output for one second, and format the current time

Source:

The result of the above example output is:

2015-10-21 17:48:40

2015-10-21 17:48:41

Xi, there are a pair of rabbits, from the 3rd month after birth a pair of rabbits each month, the small rabbit to the third month after the birth of a pair of rabbits each month, if the rabbit is not dead, ask the total number of rabbits each month?

Program Analysis: The law of Rabbits for the series 1,1,2,3,5,8,13,21 ....

Program Source code:

The result of the above example output is:

12, determine how many primes between 101-200, and output all prime numbers

Analysis: The method of judging primes: to remove 2 to sqrt (this number) with a number, if divisible, indicates that the number is not a prime, and vice versa is a prime.

Code:

The result of the above example output is:

13, print out all the "Narcissus number"

Program Source code:

The result of the above example output is:

153

370

371

407

14, the decomposition of a positive integer factorization

Program Source code:

The result of the above example output is:

90 = 2 * 3 * 3 * 5

100 = 2 * 2 * 5 * 5

Using nesting of conditional operators to complete learning achievement calculation

The students of the study score >=90 with a, 60-89 points between the use of B, 60 points below the C expression.

Analysis: (a>b)? A:b This is a basic example of conditional operators.

Code:

The result of the above example output is:

Enter Score:

89

89 belongs to B

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15 Python small case, learn these, Python Foundation has passed!