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Python Exercise: Find the index of an item of a tuple

Python tuple: Exercise-14 with Solution

Write a Python program to find the index of an item of a tuple.

Sample Solution:-

Python Code:

#create a tuple
tuplex = tuple("index tuple")
print(tuplex)
#get index of the first item whose value is passed as parameter
index = tuplex.index("p")
print(index)
#define the index from which you want to search
index = tuplex.index("p", 5)
print(index)
#define the segment of the tuple to be searched
index = tuplex.index("e", 3, 6)
print(index)
#if item not exists in the tuple return ValueError Exception
index = tuplex.index("y")

Sample Output:

('i', 'n', 'd', 'e', 'x', ' ', 't', 'u', 'p', 'l', 'e')                                                       
8                                                                                                             
8                                                                                                             
3                                                                                                             
Traceback (most recent call last):                                                                            
  File "d0e5ee40-30ab-11e7-a6a0-0b37d4d0b2c6.py", line 14, in <module>                                       
    index = tuplex.index("y")                                                                                 
ValueError: tuple.index(x): x not in tuple   

Pictorial Presentation:

Python Tuple: Find the index of an item of a tuple.
Python Tuple: Find the index of an item of a tuple.
Python Tuple: Find the index of an item of a tuple.

Flowchart:

Flowchart: Find the index of an item of a tuple

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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