Python: Update the list values within a given dictionary
Python dictionary: Exercise-51 with Solution
A Python Dictionary contains List as value. Write a Python program to update the list values in the said dictionary.
Sample Solution:
Python Code:
def test(dictionary):
dictionary['Math'] = [x+1 for x in dictionary['Math']]
dictionary['Physics'] = [x-2 for x in dictionary['Physics']]
return dictionary
dictionary = {
'Math' : [88, 89, 90],
'Physics' : [92, 94, 89],
'Chemistry' : [90, 87, 93]
}
print("\nOriginal Dictionary:")
print(dictionary)
print("\nUpdate the list values of the said dictionary:")
print(test(dictionary))
Sample Output:
Original Dictionary: {'Math': [88, 89, 90], 'Physics': [92, 94, 89], 'Chemistry': [90, 87, 93]} Update the list values of the said dictionary: {'Math': [89, 90, 91], 'Physics': [90, 92, 87], 'Chemistry': [90, 87, 93]}
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Previous: A Python Dictionary contains List as value. Write a Python program to clear the list values in the said dictionary.
Next: Write a Python program to extract a list of values from a given list of dictionaries.
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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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