python omprehensions

Example Python program python-omprehensions.py Python version 3.x or newer. To check the Python version use:

python --version

Code

Python example

# Use this as a template for list - single line for loop.

new_list = [x for x in some_list]


# Doubling every item in a list
some_list = [1,2,3,4]
new_list = [x * 2 for x in some_list]
print(new_list)

# Doubling every item in a list that is larger than 2
some_list = [1,2,3,4]
new_list = [x * 2 for x in some_list if x > 2]
print(new_list)


# Use this as a template for Dictionary

d = {'a':1,'b':2,'c':3}
for pair in d.items():
  print(pair)

d = {k:v for (k,v) in d.items()}

# Creating a new dictionary with only pairs where the value is larger than 2
d = {'a':1,'b':2,'c':3}
d = {k:v for (k,v) in d.items() if v > 2}
print(d)


# We can also perform operations on the key value pairs
d = {'a':1,'b':2,'c':3}
d = {k + 'c':v * 2 for (k,v) in d.items() if v > 2}
print(d)

Useful Links

• Articles: https://python-commandments.org/
• Python shell: https://bsdnerds.org/learn-python/
• Tutorial: https://pythonprogramminglanguage.com/