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Python: Check whether a specified value is contained in a group of values

Python Basic: Exercise-25 with Solution

Write a Python program to check whether a specified value is contained in a group of values.

Test Data:
3 -> [1, 5, 8, 3] : True
-1 -> [1, 5, 8, 3] : False

Pictorial Presentation:

Check whether a specified value is contained in a group of values

Sample Solution-1:

Python Code:

def is_group_member(group_data, n):
   for value in group_data:
       if n == value:
           return True
   return False
print(is_group_member([1, 5, 8, 3], 3))
print(is_group_member([5, 8, 3], -1))

Sample Output:

True
False

Flowchart:

Flowchart: Check whether a specified value is contained in a group of values.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Python Code:

def is_group_member(group_data, n):
 return n in group_data
print(is_group_member([1, 5, 8, 3], 3))
print(is_group_member([5, 8, 3], -1))

Sample Output:

True
False

Flowchart:

Flowchart: Check whether a specified value is contained in a group of values.

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