Dictionary keys via for in Python

When iterating over a dictionary with the for loop, its keys are always printed by default.

Example

Let us have a dictionary dct:

dct = {
	'a': 1,
	'b': 2,
	'c': 3
}

Let's run it in a loop:

for key in dct:
	print(key)

As a result of executing the code, all keys will be displayed:

'a'
'b'
'c'

You can also get the dictionary keys using the keys method. The method returns a special object that can be iterated over in a loop:

for key in dct.keys():
	print(key)

Result of code execution:

'a'
'b'
'c'

Given a dictionary:

tst = {
	'a': 1,
	'b': 2,
	'c': 3,
	'd': 4,
	'e': 5
}

Output its keys to the console:

'a'
'b'
'c'
'd'
'e'

Given a dictionary:

tst = {
	2: 'a',
	4: 'b',
	6: 'c',
	8: 'd'
}

Print its keys to the console, except 8.

Given a dictionary:

tst = {
	'1': 'a',
	'2': 'b',
	'3': 'c',
	'4': 'd'
}

Obtain the following tuple from its keys:

('2', '3', '4')