﻿ Python: Extract a list of values from a given list of dictionaries - w3resource # Python: Extract a list of values from a given list of dictionaries

## Python dictionary: Exercise-52 with Solution

Write a Python program to extract a list of values from a given list of dictionaries.

Sample Solution:

Python Code:

``````def test(lst, marks):
result = [d[marks] for d in lst if marks in d]

return result

marks = [{'Math': 90, 'Science': 92},
{'Math': 89, 'Science': 94},
{'Math': 92, 'Science': 88}]

print("\nOriginal Dictionary:")
print(marks)
subj = "Science"
print("\nExtract a list of values from said list of dictionaries where subject =",subj)
print(test(marks, subj))

print("\nOriginal Dictionary:")
print(marks)
subj = "Math"
print("\nExtract a list of values from said list of dictionaries where subject =",subj)
print(test(marks, subj))
```
```

Sample Output:

```Original Dictionary:
[{'Math': 90, 'Science': 92}, {'Math': 89, 'Science': 94}, {'Math': 92, 'Science': 88}]

Extract a list of values from said list of dictionaries where subject = Science
[92, 94, 88]

Original Dictionary:
[{'Math': 90, 'Science': 92}, {'Math': 89, 'Science': 94}, {'Math': 92, 'Science': 88}]

Extract a list of values from said list of dictionaries where subject = Math
[90, 89, 92]
```

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Python Code Editor:

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## Python: Tips of the Day

Free up Memory:

• Manual garbage collection can be performed on timely or event based mechanism.
```import gc
collected_objects = gc.collect()
```