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Python: Create a given flat list of all the keys in a flat dictionary

Python List: Exercise - 258 with Solution

Write a Python program to create a given flat list of all the keys in a flat dictionary.

  • Use dict.keys() to return the keys in the given dictionary.
  • Return a list() of the previous result.

Sample Solution:

Python Code:

def keys_only(students):
  return list(students.keys()) 
students = {
  'Laura': 10,
  'Spencer': 11,
  'Bridget': 9,
  'Howard ': 10,
}
print("Original directory elements:")
print(students)
print("\nFlat list of all the keys of the said dictionary:")
print(keys_only(students))

Sample Output:

Original directory elements:
{'Laura': 10, 'Spencer': 11, 'Bridget': 9, 'Howard ': 10}

Flat list of all the keys of the said dictionary:
['Laura', 'Spencer', 'Bridget', 'Howard ']

Flowchart:

Flowchart: Create a given flat list of all the keys in a flat dictionary.

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Previous: Write a Python program to check if two given lists contain the same elements regardless of order.
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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