Share with you today 30 individual Python Common code cases , It is recommended to collect ~
1, Bubble sort
2, calculation x of n Power method
3, calculation aa + bb + c*c + ……
4, Calculate factorial n!
5, List all files and directory names under the current directory
6, Put one list All strings in become lowercase ：
7, Output the paths of all files and folders under a certain path
8, Output a path and all file paths under its subdirectories
9, Output a path and all its subdirectories with .html File with suffix
10, Reverse the key value pairs of the original dictionary and produce a new dictionary
11, Print 99 multiplication table
By specifying end Value of parameter , You can cancel outputting carriage return at the end , Realize no line breaks .
12, Replace all in the list 3 by 3a
13, Print each name
** Be good at using range() , Will make the problem simple
14, Merge de duplication
15, Two ways of randomly generating verification code
16, Calculate square root
17, Judge whether the string is only composed of numbers
18, Judge odd and even numbers
19, Judge leap year
20, Get maximum value
21, Fibonacci sequence Fibonacci series refers to such a series 0, 1, 1, 2, 3, 5, 8, 13;
In particular ： Section 0 Item is 0, Section 1 Item is the first 1. Start with the third item , Each term is equal to the sum of the first two terms .
22, Decimal to binary , octal number system , hexadecimal
23, greatest common divisor
23, Least common multiple
24, A simple calculator
25, Generate calendar
26, file IO
27, String judgment
28, String case conversion
29, Calculate the number of days per month
30, Get yesterday's date
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