Python list Comprehensions

Python list comprehension

# List comprehension example
list = [0 for i in range(10)]
# Makes a list of 10 zeros (Change 0 for different result
# and range for different length)

# Nested List
list = [[0] * 5 for i in range(10)]
# Makes a nested list of 10 list containing 5 zeros (You can also change
# all of the int to produce different results)

List comprehensions

S = [x**2 for x in range(10)]
V = [2**i for i in range(13)]

Source: datacamp.com

List Comprehensions

numbers = [1, 2, 3, 4, 5, 6]
squares = [i*i for i in numbers]

print(squares)

List Comprehensions in python

[output_expression for variable in input_sequence if filter_condition]

Source: 8bitavenue.com

Python list Comprehensions

# List 
# new_list[<action> for <item> in <iterator> if <some condition>]
a = [i for i in 'hello']                  # ['h', 'e', 'l', 'l', '0']
b = [i*2 for i in [1,2,3]]                # [2, 4, 6]
c = [i for i in range(0,10) if i % 2 == 0]# [0, 2, 4, 6, 8]

Source: zerotomastery.io

Python list comprehension

 # A list comprehnsion is a for loop on a single line 
 # To create a list comprehension, swap the two lines in the for loop.

# Here we use PyBIDS to extract the relative path for each file:
for fmri in fmri_078:
    print(fmri.relpath)

# And here is the equivalent statement as a list comprehension.
# It must be enclosed in square brackets.
# It swaps the order of the lines and loses the colon and indentation
[ print(fmri.relpath) for fmri in fmri_078 ]

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