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Python: Insert an element at the beginning of a given OrderedDictionary

Python Collections: Exercise-22 with Solution

Write a Python program to insert an element at the beginning of a given OrderedDictionary.

Sample Solution:

Python Code:

from collections import OrderedDict
color_orderdict = OrderedDict([('color1', 'Red'), ('color2', 'Green'), ('color3', 'Blue')]) 
print("Original OrderedDict:")
print(color_orderdict)
print("Insert an element at the beginning of the said OrderedDict:")
color_orderdict.update({'color4':'Orange'})
color_orderdict.move_to_end('color4', last = False)
print("\nUpdated OrderedDict:")
print(color_orderdict)

Sample Output:

Original OrderedDict:
OrderedDict([('color1', 'Red'), ('color2', 'Green'), ('color3', 'Blue')])
Insert an element at the beginning of the said OrderedDict:

Updated OrderedDict:
OrderedDict([('color4', 'Orange'), ('color1', 'Red'), ('color2', 'Green'), ('color3', 'Blue')])

Flowchart:

Python Collections: Insert an element at the beginning of a given OrderedDictionary.

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Python Code Editor:

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Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

def tips_collect_dictionary(obj):
  inv_obj = {}
  for key, value in obj.items():
    inv_obj.setdefault(value, list()).append(key)
  return inv_obj
ages = {
  "Owen": 25,
  "Jhon": 25,
  "Pepe": 15,
}
print(tips_collect_dictionary(ages))

Output:

{25: ['Owen', 'Jhon'], 15: ['Pepe']}