Python: File extension
Python Basic: Exercise-7 with Solution
Write a Python program to accept a filename from the user and print the extension of that.
Sample filename: abc.java
Python str.rsplit(sep=None, maxsplit=-1) function:
The function returns a list of the words of a given string using a separator as the delimiter string.
- If maxsplit is given, the list will have at most maxsplit+1 elements.
- If maxsplit is not specified or -1, then there is no limit on the number of splits.
- If sep is given, consecutive delimiters are not grouped together and are deemed to delimit empty strings.
- The sep argument may consist of multiple characters.
- Splitting an empty string with a specified separator returns [''].
Pictorial Presentation:
Sample Solution:-
Python Code:
filename = input("Input the Filename: ")
f_extns = filename.split(".")
print ("The extension of the file is : " + repr(f_extns[-1]))
Sample Output:
Input the Filename: abc.java The extension of the file is : 'java'
Flowchart:
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor:
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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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