Python: Convert a given string to snake case
Python String: Exercise-97 with Solution
From Wikipedia,
Snake case (stylized as snake_case) refers to the style of writing in which each space is replaced by an underscore (_) character, and the first letter of each word written in lowercase. It is a commonly used naming convention in computing, for example for variable and subroutine names, and for filenames. One study has found that readers can recognize snake case values more quickly than camel case.
Write a Python program to convert a given string to snake case.
- Use re.sub() to match all words in the string, str.lower() to lowercase them.
- Use re.sub() to replace any - characters with spaces.
- Finally, use str.join() to combine all words using - as the separator.
Sample Solution:
Python Code:
from re import sub
def snake_case(s):
return '_'.join(
sub('([A-Z][a-z]+)', r' \1',
sub('([A-Z]+)', r' \1',
s.replace('-', ' '))).split()).lower()
print(snake_case('JavaScript'))
print(snake_case('Foo-Bar'))
print(snake_case('foo_bar'))
print(snake_case('--foo.bar'))
print(snake_case('Foo-BAR'))
print(snake_case('fooBAR'))
print(snake_case('foo bar'))
Sample Output:
java_script foo_bar foo_bar foo.bar foo_bar foo_bar foo_bar
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Previous: Write a Python program to convert a given string to camelcase.
Next: Write a Python program to decapitalize the first letter of a given string.
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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