Python – Test if elements of list are in Min/Max range from other list

When it is required to test if all elements from one list fall within the minimum and maximum range of another list, we can iterate through the elements and check if each one lies between the min and max values.

Example

Below is a demonstration of the same −

my_list = [5, 6, 4, 7, 8, 13, 15]
print("The list is:")
print(my_list)

range_list = [4, 7, 10, 6]
print("The range list is:")
print(range_list)

# Find min and max values from the main list
min_val = min(my_list)
max_val = max(my_list)
print(f"Min value: {min_val}, Max value: {max_val}")

# Check if all elements in range_list are within min/max range
my_result = True
for elem in range_list:
    if elem < min_val or elem > max_val:
        my_result = False
        break

if my_result:
    print("All elements are in the min/max range")
else:
    print("All elements are not in the min/max range")

Output

The list is:
[5, 6, 4, 7, 8, 13, 15]
The range list is:
[4, 7, 10, 6]
Min value: 4, Max value: 15
All elements are in the min/max range

Using List Comprehension

A more concise approach using list comprehension and the all() function −

my_list = [5, 6, 4, 7, 8, 13, 15]
range_list = [4, 7, 10, 6]

min_val = min(my_list)
max_val = max(my_list)

# Check using all() and list comprehension
result = all(min_val <= elem <= max_val for elem in range_list)

if result:
    print("All elements are in the min/max range")
else:
    print("All elements are not in the min/max range")

Output

All elements are in the min/max range

Example with Elements Outside Range

Here's an example where some elements fall outside the range −

my_list = [5, 6, 7, 8]
range_list = [4, 7, 10, 6]  # 4 and 10 are outside range

min_val = min(my_list)  # 5
max_val = max(my_list)  # 8

result = all(min_val <= elem <= max_val for elem in range_list)

print(f"Range: [{min_val}, {max_val}]")
print(f"Test elements: {range_list}")
print(f"All in range: {result}")

Output

Range: [5, 8]
Test elements: [4, 7, 10, 6]
All in range: False

Explanation

• The main list is defined to establish the range boundaries.

• The min() and max() functions find the minimum and maximum values.

• Each element in the test list is checked to see if it falls within the range [min_val, max_val].

• The all() function returns True only if all elements satisfy the condition.

• The result indicates whether all elements are within the specified range.

Conclusion

Use all() with list comprehension for a concise solution. The approach checks if every element in the test list falls between the minimum and maximum values of the reference list.