Python: Iterate over dictionaries using for loops
Python dictionary: Exercise-5 with Solution
Write a Python program to iterate over dictionaries using for loops.
Sample Solution:-
Python Code:
d = {'x': 10, 'y': 20, 'z': 30}
for dict_key, dict_value in d.items():
print(dict_key,'->',dict_value)
Sample Output:
x -> 10 y -> 20 z -> 30
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Previous: Write a Python program to check if a given key already exists in a dictionary.
Next: Write a Python script to generate and print a dictionary that contains a number (between 1 and n) in the form (x, x*x).
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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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